/* ============================================================
  欧乐-B 官网 · 全局样式
  品牌色：欧乐-B Blue #0057B8 / 深蓝 #003A75 / 强调红 #E4002B
   ============================================================ */

/* 中文字体：SourceHanSansCN（自托管，零外部依赖） */
@font-face {
  font-family: "SourceHanSansCN";
  src: url("../fonts/SourceHanSansCN-Light.otf") format("opentype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "SourceHanSansCN";
  src: url("../fonts/SourceHanSansCN-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "SourceHanSansCN";
  src: url("../fonts/SourceHanSansCN-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 英文/数字字体：HurmeGeometricSans1 */
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Hairline.otf") format("opentype");
  font-weight: 100;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Thin.otf") format("opentype");
  font-weight: 200;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Light.otf") format("opentype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-SemiBold.otf") format("opentype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "HurmeGeometricSans1";
  src: url("../fonts/HurmeGeometricSans1-Black.otf") format("opentype");
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "SourceHanSansCN";
  src: url("../fonts/SourceHanSansCN-Regular.otf") format("opentype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --ob-blue: #133068;
  --ob-blue-dark: #00318E;
  --ob-blue-light: #E7F2FF;
  --ob-cyan: #00B4D8;
  --ob-accent: #0066FF;
  --ob-black: #133068;
  --ob-black-2: #133068;
  --ob-red: #E94B3E;
  --ob-ink: #133068;
  --ob-gray: #133068;
  --ob-line: #E0E0E0;
  --ob-bg: #F2F2F2;
  --ob-white: #ffffff;
  --radius: 16px;
  --shadow-sm: 0 2px 8px rgba(19, 48, 104, 0.06);
  --shadow-md: 0 8px 28px rgba(19, 48, 104, 0.1);
  --shadow-lg: 0 18px 48px rgba(19, 48, 104, 0.14);
  --maxw: 1200px;
  --font: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--ob-ink);
  background: var(--ob-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 80px;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(var(--maxw), 100% - 160px);
  margin: 0 auto;
}

/* ---------- 顶部导航 ---------- */
.topbar {
  background: var(--ob-blue-dark);
  color: #cfe3f8;
  font-size: 13px;
}
.topbar .container {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 36px;
}
.topbar a {
  color: #cfe3f8;
  margin-left: 20px;
  transition: color 0.2s;
}
.topbar a:hover {
  color: #fff;
}
.lang-switch {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lang-switch a {
  margin-left: 0;
  font-weight: 600;
}
.lang-switch a.active {
  color: #fff;
}
.lang-switch .sep {
  color: rgba(255, 255, 255, 0.35);
}

.nav {
  position: fixed;
  top: 20px;
  width: 100%;
  z-index: 100;
  background: transparent;
  border-bottom: none;
}
.nav .container {
  display: flex;
  align-items: center;
  height: 60px;
  gap: 32px;
  position: relative;
}
.nav .container::before {
  content: "";
  position: absolute;
  inset: -4px -20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(24px) saturate(200%) brightness(1.15);
  backdrop-filter: blur(24px) saturate(200%) brightness(1.15);
  border: none;
  box-shadow: 0 4px 16px rgba(0, 33, 68, 0.12);
  opacity: 1;
  transition: opacity 0.35s ease;
  z-index: -1;
  pointer-events: none;
}
.nav.scrolled .container::before {
  opacity: 1;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--ob-blue);
  white-space: nowrap;
  transition: opacity 0.35s, transform 0.35s;
}
.nav.scrolled .brand {
}
.brand .dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, #4aa3ff, var(--ob-blue) 60%, var(--ob-blue-dark));
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.55);
}
.brand-logo {
  display: block;
  height: 40px;
  width: auto;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-wrap: wrap;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  line-height: 1;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: #002D72;
  background: transparent;
  border: none;
  transition: all 0.18s;
}
.nav-links a:hover {
  background: rgba(0, 45, 114, 0.08);
  color: #002D72;
}
.nav-links a.active {
  background: rgba(0, 45, 114, 0.08);
  border: none;
  color: #002D72;
}
.nav-links a[href="faqs.html"],
.nav-links a[href$="/faqs.html"] {
  display: none;
}
.footer a[href="faqs.html"],
.footer a[href$="/faqs.html"] {
  display: none;
}
.credentials-page .cta-band a[href="faqs.html"],
.credentials-page .cta-band a[href$="/faqs.html"] {
  display: none;
}

/* ---------- Mega 下拉菜单（参考 usmile 全宽展示区） ---------- */
/* 重置 .nav-links a 样式，避免污染 mega 内所有链接 */
.mega a {
  display: block;
  background: none;
  border: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  box-shadow: none;
  padding: 0;
  border-radius: 0;
  font-weight: inherit;
  font-size: inherit;
  color: inherit;
}
.mega a:hover {
  background: none;
  color: inherit;
}
.nav-item {
  position: static;
}
.nav-trigger .caret {
  font-style: normal;
  font-size: 12px;
  margin-left: 2px;
  display: none;
  transition: transform 0.2s;
}
.nav-item:hover .nav-trigger .caret {
  transform: rotate(180deg);
}

.mega {
  display: none;
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  width: calc(var(--maxw) - 48px);
  max-width: calc(100vw - 48px);
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 30, 80, 0.18);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(10px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  z-index: 90;
  overflow: hidden;
}
.nav-item:hover .mega {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
/* hover 桥接，避免指针移动时闪断 */
.mega::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.mega-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  padding: 32px 24px;
}
.mega-inner {
  padding: 0;
  display: flex;
  flex-direction: column;
  text-align: left;
}
.mega-menu-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.mega-col h5 {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ob-blue);
  padding-bottom: 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--ob-line);
}
.mega-col a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  background: none;
  transition: background 0.16s;
}
.mega-col a:hover {
  background: none;
  color: var(--ob-blue);
}
.mega-col a:hover b {
  color: var(--ob-blue);
}
.mega-col a b {
  display: block;
  font-size: 16px;
  color: var(--ob-ink);
  font-weight: 700;
}
.mega-col a span {
  display: block;
  font-size: 13px;
  color: var(--ob-gray);
  margin-top: 2px;
}

/* 精选产品卡（参考品牌货架产品卡样式） */
.mega-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: transparent;
  border-radius: 16px;
  padding: 18px;
}
.feat-card {
  background: none;
  border: none;
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: none;
  transition: all 0.2s;
}
.feat-card:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--ob-line);
}
.feat-thumb {
  position: relative;
  height: 160px;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.feat-thumb::after {
  content: "产品图";
  position: absolute;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 2px;
  color: #aeb9c4;
}
.feat-thumb .brush {
  width: 48px;
  height: 48px;
  border-radius: 0;
  box-shadow: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aab4bf' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Ccircle cx='8.5' cy='9.5' r='1.6'/%3E%3Cpath d='M21 15l-4.5-4.5L7 20'/%3E%3C/svg%3E") center/contain no-repeat;
}
.feat-thumb .brush::before {
  content: none;
}
.feat-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
  background: var(--ob-red);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
}
.feat-body {
  padding: 12px 14px 14px;
}
.feat-cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--ob-blue);
  margin-bottom: 4px;
}
.feat-body b {
  display: block;
  font-size: 15px;
  color: var(--ob-ink);
}
.feat-body > span {
  display: block;
  font-size: 12px;
  color: var(--ob-gray);
  margin-top: 4px;
}

/* Issue mega */
.mega-title {
  font-size: 13px;
  font-weight: 800;
  color: var(--ob-blue);
  padding: 24px 24px 0;
  letter-spacing: 0.3px;
  text-align: left;
}
.mega-issues {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  padding: 16px 24px 32px;
  text-align: left;
}
.mega-issue {
  border: 1px solid var(--ob-line);
  border-radius: 14px;
  padding: 14px 12px 18px;
  text-align: left;
  transition: all 0.2s;
  background: transparent;
}
.mega-issue::before {
  content: none;
}
.mega-issue:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--ob-line);
  color: var(--ob-blue);
}
.mega-issue i {
  font-style: normal;
  font-size: 30px;
  display: block;
  margin-bottom: 8px;
}
.mega-issue b {
  display: block;
  font-size: 15px;
  color: var(--ob-ink);
}
.mega-issue span {
  display: block;
  font-size: 12px;
  color: var(--ob-gray);
  margin-top: 3px;
}

/* 产品选购悬浮卡片 */
.product-nav-item {
  position: static;
}
.product-nav-trigger[aria-expanded="true"] {
  background: rgba(0, 45, 114, 0.08);
}
.product-menu {
  display: grid;
  grid-template-columns: auto auto;
  gap: 60px;
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  width: 100%;
  max-width: none;
  height: 261px;
  padding: 24px;
  justify-content: center;
  align-items: start;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 16px 44px rgba(0, 30, 80, 0.2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(10px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  z-index: 90;
}
.product-menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.product-menu::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}
.product-menu-primary {
  display: grid;
  grid-template-columns: repeat(2, 180px);
  gap: 60px;
}
.product-menu-secondary {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 40px;
  height: 180px;
  align-self: start;
}
.product-menu-primary {
  align-self: start;
}
.product-menu-card {
  display: flex !important;
  flex-direction: column;
  gap: 12px;
  padding: 0 !important;
  color: var(--ob-ink) !important;
  border-radius: 12px !important;
  text-align: left;
  transition: transform 0.2s ease;
}
.product-menu-card:hover {
  color: var(--ob-ink) !important;
  background: transparent !important;
  transform: translateY(-3px);
}
.product-menu-secondary .product-menu-card {
  display: grid !important;
  grid-template-columns: 70px max-content;
  align-items: center;
  gap: 20px;
}
.product-menu-secondary .product-menu-card:first-child {
  align-self: flex-start;
}
.product-menu-secondary .product-menu-card:last-child {
  align-self: flex-end;
}
.product-menu-media {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 16px;
  background: linear-gradient(135deg, #dfeeff 0%, #0e3c82 100%);
}
.product-menu-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: inherit;
  transform: scale(1);
  transition: transform 0.2s ease;
}
.product-menu-card:hover .product-menu-media::before {
  transform: scale(1.12);
}
.product-menu-primary .product-menu-media {
  width: 180px;
  align-self: center;
}
.product-menu-electric {
  background: url("../assets/导航牙刷图.png") center / cover no-repeat;
}
.product-menu-head {
  background: url("../assets/导航刷头图.png") center / cover no-repeat;
}
.product-menu-floss {
  background: url("../assets/导航牙线图.jpeg?v=2") center / contain no-repeat, #fff;
}
.product-menu-paste {
  background: url("../assets/导航牙膏图.png?v=3") center / contain no-repeat, #fff;
}
.product-menu-secondary .product-menu-media {
  width: 70px;
  border-radius: 14px;
}
.product-menu-card-title {
  display: block;
  font-size: 16px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ob-ink);
}
.product-menu-card:hover .product-menu-card-title {
  color: var(--ob-blue);
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.button-arrow {
  display: inline-block;
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--ob-blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--ob-blue-dark);
  transform: translateY(-2px);
}
.btn-ghost {
  background: #fff;
  color: var(--ob-blue);
  border: 2px solid var(--ob-blue);
}
.btn-ghost:hover {
  background: var(--ob-blue-light);
}
.btn-white {
  background: linear-gradient(to bottom, #0057B7, #002D72);
  background-size: 160% 100%;
  border: none;
  color: #fff;
  animation: btn-white-flow 3s ease-in-out infinite alternate;
}
@keyframes btn-white-flow {
  to {
    background-position: 100% 0;
  }
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 45, 114, 0.25);
}
@media (prefers-reduced-motion: reduce) {
  .btn-white {
    animation: none;
  }
}

/* ---------- 通用区块标题 ---------- */
.section {
  padding: 72px 0;
}
.faq-page .faq-module,
.faq-page .faq-section {
  padding: 72px 0;
}
.faq-page > .pagehead,
.faq-page > .faq-module,
.faq-page > .faq-section {
  display: none;
}
.section-head {
  text-align: left;
  max-width: 720px;
  margin: 0 0 48px;
}
.eyebrow {
  display: none;
}
.section-head h2 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  color: #002D72;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
}
.section-head p {
  margin-top: 22px;
  color: var(--ob-gray);
  font-size: 17px;
  line-height: 1.6;
}
#brand-history-head h2 {
  display: inline-block;
  font-size: 26px;
  font-weight: 800;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
#brand-history-head p {
  margin-top: 12px;
  color: var(--ob-gray);
  font-size: 15px;
  line-height: 1.6;
}

/* ---------- Hero ---------- */
.hero {
  background: #F2F2F2;
  color: var(--ob-ink);
  position: relative;
  overflow: hidden;
  margin-top: -80px;
  min-height: calc(92vh - 80px);
  display: flex;
  align-items: center;
  padding-top: 80px;
}
.hero-bg {
  position: absolute;
  top: 0;
  right: calc(max(0px, (100% - var(--maxw)) / 2) - 180px);
  height: 100%;
  width: auto;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 16%, #000 85%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, #000 16%, #000 85%, transparent 100%);
}
.hero::after {
  content: none;
}
.hero::before {
  content: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  position: relative;
  z-index: 2;
}
.hero-pretitle {
  font-size: 40px;
  color: var(--ob-ink);
  font-weight: 400;
  font-family: "SourceHanSansCN", sans-serif;
  margin-bottom: 4px;
  line-height: 1.2;
}
.io-mark {
  height: 1em;
  width: auto;
  display: inline-block;
  vertical-align: -0.14em;
  margin: 0 0.22em 0 0.02em;
}
.oralb-title-brand {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
.oralb-title-brand-latin {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
#io-series .section-head h2 .io-series-product-name-latin {
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-weight: 800;
}
.hero-claim {
  font-size: 56px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
  font-family: "SourceHanSansCN", sans-serif;
  color: #002D72;
}
.hero-claim-latin {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
.credentials-latin-number {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
.hc-num {
  font-size: 18px;
  font-weight: 700;
  vertical-align: super;
  line-height: 1;
}
.hero-desc {
  margin-top: 24px;
  font-size: 17px;
  font-weight: 600;
  color: #002D72;
  line-height: 1.6;
  max-width: 520px;
}
.hero-disclaimer {
  margin-top: 24px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ob-ink);
  opacity: 0.8;
  max-width: 480px;
  text-align: left;
}
.hero-cta {
  margin-top: 24px;
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.hero-cta .btn-ghost {
  background: transparent;
  color: #002D72;
  border: 2px solid #002D72;
}
.hero-cta .btn-ghost:hover {
  background: #002D72;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 45, 114, 0.25);
}
.hero-badges {
  margin-top: 40px;
  display: flex;
  gap: 18px;
  justify-content: flex-start;
  align-items: flex-start;
  max-width: 560px;
  flex-wrap: wrap;
}
.hero-badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-badge-img {
  height: 120px;
  width: auto;
  display: block;
}
.hero-badge-label {
  margin-top: -16px;
  font-size: 15px;
  font-weight: 500;
  font-family: "SourceHanSansCN", sans-serif;
  color: var(--ob-ink);
  line-height: 1.5;
}
.hero-badge-label b {
  font-family: "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
.hero-visual {
  display: none;
}
.round-head {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffffff, #d9ecff 45%, #7fb6f0 100%);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35), inset 0 0 0 14px rgba(255, 255, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.round-head::before {
  content: "";
  position: absolute;
  inset: 40px;
  border-radius: 50%;
  border: 3px dashed rgba(0, 87, 184, 0.35);
}
.round-head b {
  font-size: 26px;
  color: var(--ob-blue-dark);
  font-weight: 800;
  text-align: center;
  line-height: 1.3;
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) {
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 999px) and (min-width: 761px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 999px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

.card p {
  word-break: break-word;
  overflow-wrap: break-word;
}
.card {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
  overflow: hidden;
}
.card-media {
  aspect-ratio: 16/9;
  margin: -28px -28px 20px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: #eef3fa center / cover no-repeat;
}
/* 「为什么选择」板块：标题胶囊框 + 卡片标题加粗 */
#why-oralb .section-head {
  text-align: left;
  margin-bottom: 48px;
}
#why-oralb .section-head h2 {
  display: inline-block;
  font-size: 26px;
  font-weight: 800;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
#why-oralb .card-media,
#how-oralb .card-media {
  aspect-ratio: 1/1;
}
#why-oralb .card h3,
#how-oralb .card h3 {
  font-weight: 700;
  color: #002D72;
}
#why-oralb .card > h3,
#why-oralb .card > p,
#how-oralb .card > h3,
#how-oralb .card > p {
  text-align: left;
}
.health-bento {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.health-card {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.22s;
}
.health-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c9ddf3;
}
.health-card-big {
  grid-column: 1 / -1;
  position: relative;
  min-height: 440px;
  justify-content: center;
}
.health-card-big .health-body {
  position: relative;
  z-index: 1;
  flex: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-left: 64px;
}
.health-card-big .health-media {
  position: absolute;
  inset: 0;
  height: auto;
  background-color: #fff;
  background-size: cover !important;
  background-position: center;
  z-index: 0;
}
.health-card-big .health-body h3 {
  font-size: 44px;
  line-height: 1.3;
  font-weight: 300;
  color: #fff;
}
.health-media {
  height: 320px;
  background: #eef3fa center / cover no-repeat;
  flex-shrink: 0;
}
.health-body {
  padding: 28px;
}
.health-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ob-ink);
  margin-bottom: 18px;
  line-height: 1.2;
}
.health-body p {
  color: var(--ob-gray);
  font-size: 15px;
  margin-top: 8px;
}
.health-highlight {
  color: var(--ob-blue);
  font-weight: 700;
}
.health-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.health-list li {
  font-size: 16px;
  color: var(--ob-ink);
}
.health-list li b {
  color: var(--ob-blue);
  font-weight: 700;
}
.health-card-big .health-list {
  flex-direction: row;
  gap: 40px;
  margin-top: 12px;
}
.health-card-big .health-list li {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  white-space: nowrap;
}
.health-card-big .health-list li b {
  font-size: 28px;
  color: #fff;
}
.health-card-big .health-list li span {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  white-space: nowrap;
}

/* ===「欧乐B如何帮助改善口腔健康」重设计：3列卡片=== */
.how-title,
#how-oralb .section-head h2,
#credentials .section-head h2 {
  display: inline-block;
  font-size: 26px;
  font-weight: 800;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
.how-grid {
  gap: 20px;
}
.how-card {
  background: #F5F8FC;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 14px rgba(0,45,114,0.08);
  display: flex;
  flex-direction: column;
  transition: transform 0.22s, box-shadow 0.22s;
}
.how-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0,45,114,0.12);
}
.how-card-media {
  height: 260px;
  background: #0B1F45 center / cover no-repeat;
  flex-shrink: 0;
}
.how-card-media--2 {
  background-color: #0d2248;
  background-image: url('assets/图像 (7).png');
}
.how-card-media--3 {
  background-color: #091830;
  background-image: url('assets/图像 (6).png');
}
.how-card-body {
  padding: 24px 28px 30px;
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: left;
}
.how-card-body h3 {
  font-size: 20px;
  font-weight: 800;
  color: #002D72;
  line-height: 1.2;
  margin-bottom: 20px;
}
.how-divider {
  height: 1px;
  background: #dde8f5;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.how-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.how-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--ob-ink);
}
.how-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 11px;
  border-radius: 100px;
  border: 1.5px solid #0057B7;
  background: #F5F8FC;
  color: #0057B7;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}
.how-card-body p {
  font-size: 15px;
  color: var(--ob-gray);
  line-height: 1.6;
  margin-top: 10px;
}
.how-card-body p:first-of-type {
  margin-top: 0;
}
.how-highlight {
  color: var(--ob-gray) !important;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px !important;
}
.how-highlight b {
  font-weight: 800;
  color: var(--ob-blue);
}
@media (max-width: 900px) {
  .how-grid { grid-template-columns: 1fr !important; }
  .how-card-media { height: 220px; }
}
.cred-hero {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--ob-line);
  background: #fff;
}
.cred-hero-media {
  aspect-ratio: 6336/2688;
  width: 100%;
  background: #061a4a center / cover no-repeat;
}
.cred-hero-caption {
  padding: 28px 32px;
  border-top: 1px solid #D5D7E0;
  background: #002D72;
  color: #ffffff;
  text-align: left;
}
.cred-hero-caption h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
  line-height: 1.2;
}
.cred-hero-caption p {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
}
.cred-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--ob-line);
  padding: 20px 32px;
}
.cred-strip-item {
  flex: 0 1 auto;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.cred-strip-item + .cred-strip-item {
  border-left: none;
}
.cred-strip .trust-divider {
  align-self: center;
  height: 40px;
}
.cred-strip-item b {
  font-size: 15px;
  font-weight: 700;
  color: var(--ob-blue);
  white-space: nowrap;
  font-family: "SourceHanSansCN", sans-serif;
  font-variant-numeric: lining-nums;
}
.cred-strip-item b .num {
  font-weight: 700;
}
.cred-strip-item p {
  margin-top: 0;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(19, 48, 104, 0.8);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c9ddf3;
}
.card .icon {
  width: 44px;
  height: 5px;
  border-radius: 999px;
  background: var(--ob-blue);
  margin-bottom: 18px;
}
.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.2;
  color: #002D72;
}
.card p {
  color: var(--ob-gray);
  font-size: 15px;
  line-height: 1.6;
}
#io-series .card {
  display: flex;
  flex-direction: column;
  overflow: visible;
}
#io-series .io-series-product-name {
  font-family: "SourceHanSansCN", sans-serif;
}
#io-series .io-series-product-name-latin {
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
}
#io-series .io-series-product-description {
  font-family: "SourceHanSansCN", sans-serif;
}
#io-series .card p {
  margin-bottom: 20px;
}
#io-series .card .card-price {
  margin-top: auto;
  padding-top: 8px;
}
#io-series .card .product-card-button {
  margin-top: auto;
}
.product-card-button {
  width: 100%;
  min-height: 44px;
  margin: 20px 0 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid #002D72;
  border-radius: 999px;
  color: #002D72;
  background: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  transition: background-color 0.2s, color 0.2s, transform 0.2s;
}
.product-card-button:hover {
  color: #fff;
  background: #002D72;
  transform: translateY(-2px);
}
#issue-overview .section-head h2,
#issue-overview .section-head p {
  color: #fff;
}
#issue-overview .issue-overview-title-latin {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
#issue-overview .section-head > p:not(.issue-overview-disclaimer) {
  white-space: nowrap;
}
#issue-overview .section-head .issue-overview-disclaimer {
  margin-top: 22px;
  margin-bottom: 0;
  font-size: 12px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  text-align: left;
  white-space: normal;
}
#issue-overview .issue-nav .card {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
#issue-overview .issue-nav {
  grid-auto-rows: 1fr;
}
#issue-overview .issue-nav .card h3 {
  position: relative;
  padding-left: 28px;
  margin-bottom: 0;
  flex: 0 0 auto;
}
#issue-overview .issue-nav .card h3::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: #002D72;
  font-weight: 800;
}
#issue-overview .issue-nav .card p {
  margin-top: 0;
}
#issue-overview .issue-nav .card .product-card-button {
  margin-top: auto;
}
#issue-overview > .container > p {
  color: #fff !important;
}
#issue-overview .issue-overview-notes {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  text-align: left;
}
#issue-overview .issue-overview-notes p {
  margin-bottom: 4px;
}
#issue-overview .issue-overview-notes sup {
  margin-right: 4px;
}
.card-price {
  margin-top: 16px;
}
.price-label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ob-ink);
  opacity: 0.5;
}
.price-value {
  font-size: 16px;
  font-weight: 700;
  font-family: "HurmeGeometricSans1", sans-serif;
  color: #002D72;
}
.card .link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 15px;
}
.card .link:hover { gap: 10px; }

/* 知识中心「阅读科普」按钮：与「前往购买」保持一致的字体与间距 */
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  color: #002D72;
  transition: gap 0.2s;
}
.card-link .arr {
  transition: transform 0.2s;
}
.card:hover .card-link {
  gap: 10px;
}
.card:hover .card-link .arr {
  transform: translateX(2px);
}

/* 刷头适用人群标签 */
.brush-tag {
  display: inline-block;
  margin: 16px 0 8px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: var(--ob-blue);
  background: var(--ob-blue-light);
  letter-spacing: 0.3px;
}

/* ---------- 刷头家族：卡片式布局（对齐 cred-hero 样式） ---------- */
.brush-hero {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--ob-line);
  background: #fff;
}
.brush-hero-media {
  position: relative;
  width: 100%;
  min-height: 340px;
  display: flex;
  align-items: center;
  background: #061a4a center / cover no-repeat;
}
.brush-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,20,50,0.78) 0%, rgba(0,20,50,0.5) 45%, transparent 75%);
  display: flex;
  align-items: center;
}
.brush-hero-text {
  width: 50%;
  padding: 40px 48px;
  text-align: left;
}
.brush-hero-text p {
  font-size: 15px;
  line-height: 1.6;
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 14px;
}
.brush-head-list {
  padding-left: 20px;
  line-height: 1.9;
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
}
.brush-head-list li {
  margin-bottom: 2px;
}
.brush-head-note {
  margin-top: 16px;
  font-size: 14px;
  color: #ffffff;
  font-weight: 700;
  line-height: 1.6;
}
/* 五个刷头横向排列 */
.brush-strip {
  display: flex;
  align-items: stretch;
  gap: 0;
  border-top: 1px solid var(--ob-line);
  padding: 0;
}
.brush-strip-item {
  flex: 1;
  padding: 24px 20px 40px;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  transition: background 0.2s;
  position: relative;
}
.brush-strip-item + .brush-strip-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: rgba(19, 48, 104, 0.05);
}
.brush-strip-item:hover {
  background: #f7f9fc;
}
.brush-strip-img {
  width: 100%;
  aspect-ratio: 1/1;
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: #eef3fa center / cover no-repeat;
}
.brush-strip-item .brush-tag {
  margin-top: 0;
  margin-bottom: 12px;
  background: rgba(0, 87, 183, 0.08);
  color: #003A75;
}
.brush-strip-item h3 {
  font-size: 20px;
  font-weight: 700;
  color: #002D72;
  margin-bottom: 12px;
  line-height: 1.2;
}
.brush-strip-item p {
  font-size: 13px;
  color: var(--ob-gray);
  line-height: 1.6;
}
.brush-disclaimers {
  margin-top: 32px;
  font-size: 12px;
  color: rgba(19, 48, 104, 0.8);
  line-height: 1.6;
  text-align: left;
}
.brush-disclaimers p {
  margin-bottom: 4px;
}
.brush-disclaimers sup {
  margin-right: 4px;
}
.io2-document-page #why-io2 .card h3 sup.cheerio-note-four {
  position: relative;
  top: -0.25em;
  font-size: 0.55em;
  font-weight: 400;
  line-height: 0;
}
.io2-document-page #why-io2 .card p .note-keep {
  white-space: nowrap;
}
.io2-document-page #modes .section-head h2 .cheerio-mode-number {
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
/* 标题内脚注符号：与注释小字一致，不加粗 */
sup.title-sup {
  font-size: 12px;
  font-weight: 400;
  vertical-align: super;
  position: relative;
  top: -8px;
  margin-right: 4px;
}
/* 临床数据卡片副文本分点符号加粗 */
#clinical-data .card p b.dot {
  font-weight: 900;
  font-size: 18px;
  line-height: 0;
  margin-right: 4px;
}
/* 临床数据卡片标题内脚注符号：与注释小字一致(12px/400)，位置与title-sup一致 */
#clinical-data .card h3 sup {
  font-size: 12px;
  font-weight: 400;
  vertical-align: super;
  position: relative;
  top: -8px;
  margin-right: 4px;
}
@media (max-width: 999px) {
  .brush-strip { flex-wrap: wrap; }
  .brush-strip-item { flex: 1 1 33.333%; }
  .brush-strip-item:nth-child(3) { border-left: none; }
  .brush-strip-item:nth-child(n+4) { border-top: 1px solid #D5D7E0; }
}
@media (max-width: 760px) {
  .brush-strip { flex-direction: column; }
  .brush-strip-item { flex: 1 1 auto; border-left: none; border-top: 1px solid #D5D7E0; }
  .brush-strip-item:first-child { border-top: none; }
}

/* ---------- iO 产品总览：横向滚动卡片轮播 ---------- */
.io-carousel {
  position: relative;
}
.io-viewport {
  /* hover 阴影需要上下留空间，用 padding + 负 margin 让 overflow 不裁切 */
  overflow: visible;
  padding: 40px 0;
  margin: -40px 0;
}
.io-viewport-inner {
  /* clip 只裁切横向（滚动），纵向阴影可溢出 */
  overflow-x: clip;
  overflow-y: visible;
}
.io-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
}
/* 3.5 张卡片：3张完整 + 0.5张露出 */
.io-card {
  flex: 0 0 calc((100% - 72px) / 3.5);
  min-width: 0;
}
@media (max-width: 999px) {
  .io-card { flex: 0 0 calc((100% - 48px) / 2.5); }
}
@media (max-width: 760px) {
  .io-card { flex: 0 0 calc((100% - 24px) / 1.5); }
}
.io-arrow {
  position: absolute;
  top: 120px; /* 对齐卡片图片中线 */
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--ob-line);
  background: #fff;
  color: var(--ob-blue);
  font-size: 0;
  line-height: 0;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,30,80,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
  z-index: 3;
}
.io-arrow::before {
  content: "";
  width: 10px;
  height: 10px;
  border-top: 2.5px solid currentColor;
  border-right: 2.5px solid currentColor;
}
.io-prev {
  left: -56px;
}
.io-prev::before {
  transform: rotate(-135deg);
  margin-left: 4px;
}
.io-next {
  right: -56px;
}
.io-next::before {
  transform: rotate(45deg);
  margin-right: 4px;
}
.io-arrow:hover {
  background: var(--ob-blue);
  color: #fff;
  border-color: var(--ob-blue);
}
.io-arrow:disabled {
  opacity: 0;
  cursor: default;
  pointer-events: none;
}

/* 品牌发展历程 — 横向时间轴 */
.timeline-section {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  max-width: var(--maxw);
  width: calc(100% - 160px);
  margin: 0 auto;
}
.timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  border-radius: var(--radius);
}
.timeline-section > .container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.timeline-line {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0;
  min-height: 400px;
}
.timeline-line::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: rgba(255, 255, 255, 0.5);
}
.timeline-node {
  position: relative;
  flex: 1;
  height: 100%;
  display: flex;
  justify-content: center;
}
.timeline-node::before {
  content: "";
  position: absolute;
  top: 50%;
  left: var(--dot-left, 50%);
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #0057B7;
  z-index: 1;
}
.timeline-up .timeline-content {
  position: absolute;
  bottom: calc(50% + 24px);
  left: 50%;
  transform: translateX(-50%);
  width: fit-content;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.timeline-down .timeline-content {
  position: absolute;
  top: calc(50% + 24px);
  left: 50%;
  transform: translateX(-50%);
  width: fit-content;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.timeline-content {
  text-align: left;
  max-width: 400px;
  width: fit-content;
}
.timeline-date {
  font-size: 16px;
  font-weight: 800;
  font-family: "HurmeGeometricSans1", sans-serif;
  color: #fff;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  width: fit-content;
  text-align: left;
}
.timeline-content h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px;
  color: #fff;
  line-height: 1.3;
}
.timeline-content p {
  font-size: 13px;
  color: #fff;
  line-height: 1.5;
  text-align: left;
}
.timeline-wrap {
  position: relative;
  margin-top: 0;
  border-radius: var(--radius);
  overflow: hidden;
}
.timeline-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4%;
}
.tl-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  max-width: 15%;
}
.tl-year {
  font-size: 14px;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 2px;
  white-space: nowrap;
}
.tl-desc {
  font-size: 9px;
  line-height: 1.4;
  color: #ffffff;
}
.tl-item:nth-child(odd) .tl-year {
  color: #ffffff;
}
.tl-item:nth-child(even) .tl-year {
  color: #ffffff;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  background: #fff;
  border-bottom: 1px solid var(--ob-line);
  font-size: 14px;
  color: var(--ob-gray);
}
.breadcrumb .container {
  padding: 14px 24px;
}
.breadcrumb a { color: var(--ob-blue); font-weight: 600; }
.breadcrumb span { margin: 0 8px; color: #b9c4cf; }

/* ---------- 页头 banner（子页） ---------- */
.pagehead {
  background: #F2F2F2;
  color: var(--ob-ink);
  padding: 0;
  margin-top: -80px;
  position: relative;
  overflow: hidden;
  min-height: calc(92vh - 80px);
  display: flex;
  align-items: center;
  padding-top: 80px;
}
.pagehead-bg {
  position: absolute;
  top: 0;
  right: calc(max(0px, (100% - var(--maxw)) / 2) - 180px);
  height: 100%;
  width: auto;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 16%, #000 85%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, #000 16%, #000 85%, transparent 100%);
}
.pagehead::after {
  content: none;
}
.pagehead .container {
  position: relative;
  z-index: 2;
  padding-top: 40px;
  padding-bottom: 40px;
}
.pagehead h1 {
  font-size: 56px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-family: "SourceHanSansCN", sans-serif;
  color: #002D72;
}
.pagehead-title-latin {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
.pagehead p {
  margin-top: 24px;
  font-size: 17px;
  font-weight: 600;
  color: #002D72;
  max-width: 520px;
  line-height: 1.6;
}
.pagehead .pagehead-disclaimer {
  margin-top: 24px;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--ob-ink);
  opacity: 0.5;
  max-width: 480px;
  text-align: left;
}

/* ---------- 产品卡 ---------- */
.product {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
  display: flex;
  flex-direction: column;
}
.product:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.product .thumb {
  height: 200px;
  background: #eef2f7;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.product .thumb::after {
  content: "产品图";
  position: absolute;
  bottom: 18px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 2px;
  color: #aeb9c4;
}
.product .thumb .brush {
  width: 64px;
  height: 64px;
  border-radius: 0;
  box-shadow: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aab4bf' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Ccircle cx='8.5' cy='9.5' r='1.6'/%3E%3Cpath d='M21 15l-4.5-4.5L7 20'/%3E%3C/svg%3E") center/contain no-repeat;
}
.product .thumb .brush::before {
  content: none;
}
.product .tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--ob-red);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.product .body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product .body .cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--ob-blue);
}
.product .body h3 {
  font-size: 18px;
  margin: 6px 0;
}
.product .body p {
  font-size: 14px;
  color: var(--ob-gray);
  flex: 1;
}
.product .price {
  font-size: 22px;
  font-weight: 800;
  color: var(--ob-ink);
  margin: 12px 0;
}
.product .price small {
  font-size: 13px;
  color: #9aa7b4;
  font-weight: 500;
  text-decoration: line-through;
  margin-left: 6px;
}
.link-detail {
  display: block;
  text-align: center;
  margin-top: 10px;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 14px;
}
.link-detail:hover {
  text-decoration: underline;
}
.rec-price {
  font-size: 14px;
  color: var(--ob-gray);
  margin: 10px 0;
}
.rec-price b {
  color: var(--ob-ink);
  font-size: 18px;
  font-weight: 800;
  margin-left: 4px;
}
/* 页面级双 Tab（品牌货架页 / 产品页） */
.page-tabs {
  background: #fff;
  border-bottom: 1px solid var(--ob-line);
}
.page-tabs .container {
  display: flex;
  gap: 10px;
  justify-content: center;
  padding: 16px 24px;
}
.page-tabs a {
  padding: 9px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  color: var(--ob-ink);
  border: 1px solid var(--ob-line);
  background: #fff;
  transition: all 0.18s;
}
.page-tabs a:hover {
  border-color: var(--ob-blue);
  color: var(--ob-blue);
}
.page-tabs a.active {
  background: var(--ob-blue);
  color: #fff;
  border-color: var(--ob-blue);
}
/* SKU 列表（Product Page 第一模块，列表样式） */
.sku-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sku-row {
  display: flex;
  align-items: center;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.sku-row:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: #c9ddf3;
}
.sku-row-thumb {
  width: 100px;
  height: 72px;
  border-radius: 10px;
  flex-shrink: 0;
}
.sku-row-info {
  flex: 1;
  min-width: 0;
}
.sku-row-info .cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--ob-blue);
}
.sku-row-info h3 {
  font-size: 18px;
  margin: 2px 0;
}
.sku-row-info p {
  font-size: 14px;
  color: var(--ob-gray);
}
.sku-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.sku-specs span {
  font-size: 12px;
  color: var(--ob-gray);
  background: var(--ob-bg);
  border: 1px solid var(--ob-line);
  padding: 3px 10px;
  border-radius: 999px;
}
.sku-row-price {
  font-size: 13px;
  color: var(--ob-gray);
  white-space: nowrap;
  text-align: right;
}
.sku-row-price b {
  display: block;
  font-size: 20px;
  color: var(--ob-ink);
  font-weight: 800;
}
.sku-row-go {
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .sku-row {
    flex-wrap: wrap;
    gap: 12px;
  }
  .sku-row-thumb {
    width: 72px;
    height: 56px;
  }
  .sku-row-price,
  .sku-row-go {
    text-align: left;
  }
}

/* Word brief: iO2 ten-module editorial product story. */
.io2-document-page {
  --io2-ink: #10243e;
  --io2-blue: #002d72;
  --io2-cyan: #dff3fb;
  --io2-line: #c8d8e8;
  color: var(--io2-ink);
  background: #fff;
}
.io2-document-page#document-summary {
  background: var(--ob-bg);
}
.io2-site {
  padding-top: 0;
  background: #fff;
}
.io2-site .breadcrumb {
  position: absolute;
  top: 98px;
  left: 0;
  z-index: 5;
  width: 100%;
  background: transparent;
  border-bottom: 0;
  pointer-events: none;
}
.io2-site .breadcrumb .container {
  padding: 10px 0;
}
.io2-site .breadcrumb a,
.io2-site .breadcrumb strong {
  color: #002D72;
  pointer-events: auto;
}
.io2-site .io2-document-hero {
  margin-top: 0;
  padding-top: 180px;
}
.io2-document-page p,
.io2-document-page li {
  font-size: 16px;
  line-height: 1.9;
}
.io2-document-page .brush-disclaimers p {
  font-size: 12px;
  font-weight: 400;
  color: rgba(19, 48, 104, 0.8);
  line-height: 1.6;
}
.io2-document-page .brush-hero-text p {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  line-height: 1.6;
}
.io2-document-page .brush-head-note {
  font-size: 14px;
}
.io2-document-page .brush-strip-item p {
  font-size: 13px;
  font-weight: 400;
  color: var(--ob-gray);
  line-height: 1.6;
}
.io2-document-hero {
  padding: 96px 0 88px;
  min-height: 0;
  background: #fff;
}
.io2-document-hero-grid {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(48px, 7vw, 104px);
}
.io2-doc-split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: clamp(44px, 6vw, 96px);
}
.io2-document-visual {
  min-height: 0;
  aspect-ratio: 1;
  width: 100%;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid #e2e5e8;
  border-radius: 0;
  background: transparent;
  padding: 24px;
}
.io2-document-hero .io2-document-visual {
  display: grid;
  min-height: 0;
  border: 1px solid #e2e5e8;
  border-radius: 16px;
  background: transparent;
  padding: 0;
}
.io2-document-hero .io2-hero-media::before {
  content: none;
}
.io2-document-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0;
}
.io2-document-hero .io2-document-visual img {
  display: block;
  width: auto;
  height: auto;
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  justify-self: center;
}
.io2-document-copy {
  width: 100%;
  max-width: 650px;
  padding-top: 0;
}
.io2-document-copy h1 {
  max-width: 620px;
  margin: 0 0 28px;
  color: var(--io2-blue);
  font-family: "SourceHanSansCN", sans-serif;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-document-copy .io2-brand-lockup {
  font-family: "SourceHanSansCN", sans-serif;
  font-weight: 700;
  white-space: nowrap;
}
.io2-document-copy .io2-brand-latin {
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-weight: 600;
}
.io2-document-copy > p:not(.io2-footnote) {
  color: #133068;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.75;
}
.io2-document-copy > p.io2-hero-small {
  color: #002D72;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
}
.io2-document-copy > p.io2-hero-question {
  color: #133068;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}
.io2-document-copy > p.io2-hero-question .hero-note-mark {
  position: relative;
  top: -0.3em;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-size: 0.65em;
  line-height: 0;
}
.io2-document-copy p + p {
  margin-top: 18px;
}
.io2-document-copy .io2-footnote,
.io2-footnote {
  color: #5d7186;
  font-size: 12px;
  line-height: 1.65;
}
.io2-document-copy .io2-price {
  margin-top: 18px;
}
.io2-document-copy .io2-price {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  margin-top: 18px;
  padding-top: 0;
  border-top: 0;
  opacity: 1;
}
.io2-document-copy .io2-price span {
  color: #002D72;
  font-size: 12px;
  font-weight: 400;
}
.io2-document-copy .io2-price strong {
  color: #002D72;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.1;
}
.io2-doc-section {
  padding: clamp(72px, 10vw, 132px) 0;
}
.io2-doc-section-tint {
  background: #f4fbfe;
}
.io2-doc-section-intro {
  padding: 48px 0;
  background: #002D72;
  color: #fff;
}
.io2-doc-section-intro .eyebrow,
.io2-doc-section-intro h2,
.io2-doc-section-intro h3,
.io2-doc-section-intro p,
.io2-doc-section-intro li {
  color: #fff;
}
.io2-doc-section-benefit {
  background: #fff;
}
.io2-doc-section-blue {
  color: #fff;
  background: var(--io2-blue);
}
.io2-doc-section-blue .eyebrow,
.io2-doc-section-blue h2,
.io2-doc-section-blue h3 {
  color: #fff;
}
.io2-doc-copy h2,
.io2-doc-head h2 {
  max-width: 700px;
  margin: 14px 0 28px;
  color: var(--io2-blue);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
}
.io2-doc-section-blue .io2-doc-copy h2,
.io2-doc-section-blue .io2-doc-head h2 {
  color: #fff;
}
.io2-doc-copy {
  max-width: 650px;
}
.io2-doc-art {
  min-height: 400px;
  display: grid;
  place-items: center;
  padding: 30px;
  border-radius: 44% 56% 50% 50%;
  background: #e5f6fb;
}
.io2-doc-section-blue .io2-doc-art {
  background: rgba(255, 255, 255, 0.12);
}
.io2-doc-art img {
  max-width: 78%;
  max-height: 360px;
  object-fit: contain;
}
.io2-doc-split-reverse > :first-child {
  order: 2;
}
.io2-doc-split-reverse > :last-child {
  order: 1;
}
.io2-art-circular {
  border-radius: 50%;
}
.io2-doc-section-intro .io2-doc-copy h2 {
  max-width: none;
  margin: 0 0 16px;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0;
}
.io2-doc-section-intro .io2-doc-copy > p {
  color: #fff;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
}
.io2-doc-section-intro .io2-doc-copy > p + p {
  margin-top: 10px;
}
.io2-image-placeholder {
  width: min(100%, 360px);
  min-height: 0;
  aspect-ratio: 3 / 4;
  justify-self: end;
  border: 1px dashed #9eb6ca;
  border-radius: 0;
  background: #fff;
  color: #6f879d;
  font-size: 14px;
  font-weight: 600;
}
.io2-doc-section-intro .io2-image-placeholder {
  justify-self: start;
  border-color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.io2-doc-section-blue .io2-image-placeholder {
  justify-self: start;
  border-color: rgba(255, 255, 255, 0.65);
  border-radius: 0;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.io2-doc-section-module-four {
  color: #002D72;
  background: var(--ob-bg);
}
.io2-doc-section-module-four .io2-doc-copy,
.io2-doc-section-module-four .io2-doc-copy h2,
.io2-doc-section-module-four .io2-doc-copy p,
.io2-doc-section-module-four .io2-doc-copy li {
  color: #002D72;
}
.io2-doc-section-module-four .io2-doc-copy p {
  font-weight: 600;
}
.io2-doc-section-module-four .io2-check-list li {
  font-weight: 600;
}
.io2-doc-section-module-four .io2-image-placeholder {
  border-color: #9eb6ca;
  background: #fff;
  color: #6f879d;
}
.io2-doc-section-module-four .io2-check-list li::before {
  color: #002D72;
}
.io2-doc-section-module-five {
  color: #fff;
  background: #002D72;
}
.io2-doc-section-module-five .io2-doc-copy,
.io2-doc-section-module-five .io2-doc-copy h2,
.io2-doc-section-module-five .io2-doc-copy p,
.io2-doc-section-module-five .io2-doc-copy li {
  color: #fff;
}
.io2-doc-section-module-five .io2-doc-copy p,
.io2-doc-section-module-five .io2-check-list li {
  font-weight: 600;
}
.io2-doc-section-module-five .io2-image-placeholder {
  justify-self: end;
  border-color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.io2-doc-section-module-six {
  color: #002D72;
  background: #fff;
}
.io2-doc-section-module-six .io2-doc-copy,
.io2-doc-section-module-six .io2-doc-copy h2,
.io2-doc-section-module-six .io2-doc-copy p,
.io2-doc-section-module-six .io2-doc-copy li {
  color: #002D72;
}
.io2-doc-section-module-six .io2-doc-copy h2 {
  margin: 0 0 28px;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-doc-section-module-six .io2-doc-copy > .io2-check-list + p {
  margin: 24px 0 0 !important;
}
.io2-doc-section-module-six .io2-doc-copy p,
.io2-doc-section-module-six .io2-check-list li {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-module-seven {
  color: #002D72;
  background: var(--ob-bg);
}
.io2-doc-section-module-seven .io2-doc-copy,
.io2-doc-section-module-seven .io2-doc-copy h2,
.io2-doc-section-module-seven .io2-doc-copy p {
  color: #002D72;
}
.io2-doc-section-module-seven .io2-doc-copy h2 {
  margin: 0 0 28px;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-doc-section-module-ten {
  color: #002D72;
  background: var(--ob-bg);
  padding-top: 72px;
}
.io9-page .io2-doc-section-module-ten {
  padding-bottom: 0;
}
.io2-purchase-channels .grid-3 {
  align-items: stretch;
}
.io2-summary-title-latin {
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
.io2-doc-section-module-ten .io2-doc-copy,
.io2-doc-section-module-ten .io2-doc-copy h2,
.io2-doc-section-module-ten .io2-doc-copy li {
  color: #002D72;
}
.io2-doc-section-module-ten .io2-doc-copy h2 {
  max-width: 700px;
  margin: 14px 0 28px;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-summary-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.io2-summary-list .io2-summary-item {
  align-items: flex-start;
}
.io2-summary-item {
  display: flex;
  align-items: flex-start;
  min-height: 68px;
  margin: 0;
  padding: 20px 28px;
  border-color: var(--ob-line);
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
}
.io2-summary-item:hover {
  transform: none;
  border-color: var(--ob-line);
  box-shadow: var(--shadow-sm);
}
.io2-summary-item span {
  position: relative;
  padding-left: 32px;
  color: #002D72;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0;
}
.io2-summary-item span::before {
  position: absolute;
  left: 0;
  color: #002D72;
  content: "✓";
  font-weight: 800;
}
.io2-doc-section-module-eight .io2-mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}
.io2-doc-section-module-eight .io2-mode-grid article {
  position: relative;
  min-height: 0;
  padding: 0 0 0 28px;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.io2-doc-section-module-eight .io2-mode-grid article::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.6;
}
.io2-doc-section-module-eight .io2-mode-grid h3 {
  margin: 0;
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-module-eight .io2-mode-grid p {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.9;
  letter-spacing: 0;
}
.io2-doc-section-module-seven .io2-doc-copy p {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-module-nine {
  color: #002D72;
  background: var(--ob-bg);
}
.io2-document-page #brush-heads {
  padding-top: 72px;
}
.io2-document-page #brush-heads .card h3 {
  font-size: 20px;
}
.io2-document-page #brush-heads .card {
  padding-bottom: 28px;
  text-align: left;
}
.io2-document-page #brush-heads .card h3 {
  margin-bottom: 0;
}
.io2-document-page #brush-heads .io2-brush-card-note {
  margin: 10px 0 0;
  color: var(--ob-gray);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.6;
}
.io2-document-page #brush-heads .io2-brush-subtitle {
  margin-top: 10px;
  color: var(--ob-gray);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.6;
}
.io2-brush-title-number {
  display: inline-block;
  margin-right: 4px;
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
.io2-care-service-section {
  color: #002D72;
  background: var(--ob-bg);
}
.io2-care-title-number {
  display: inline-block;
  margin-right: 4px;
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 700;
}
#why-io5 .section-head {
  max-width: none;
}
#why-io5 .section-head h2 .io2-brand-latin {
  font-weight: 600;
}
#why-io5 .section-head h2 sup.title-sup {
  font-weight: 600;
}
#why-io3 .section-head {
  max-width: none;
}
#why-io3 .section-head h2 .io2-brand-latin {
  font-weight: 700;
}
#why-io7 .section-head {
  max-width: none;
}
#why-io7 .section-head h2 {
  line-height: 1.5;
}
#why-io7 .section-head h2 .io2-brand-latin {
  font-weight: 700;
}
#why-io7 .section-head h2 sup.title-sup {
  font-weight: 600;
}
#why-io7 .section-head h2 br + * {
  font-weight: 400;
}
#why-io7 .section-head h2 br + * sup.title-sup {
  font-weight: 600;
}
#why-io7 .section-head h2 .io7-issue-line {
  font-weight: 800;
}
#why-io7 .section-head h2 .io7-sep {
  font-weight: 300;
}
.io2-document-page #brush-heads,
.io2-document-page #care-service,
.io2-document-page #document-summary {
  padding: 72px 0;
}
.cheerio-page .io2-document-page#document-summary {
  padding-bottom: 72px;
}
.io9-page #document-summary {
  padding-bottom: 40px;
}
.cheerio-page #modes {
  padding-top: 72px;
  padding-bottom: 72px;
}
.io2-care-service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.io2-care-service-card {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin: 0;
}
.io2-care-service-card h3 {
  margin-bottom: 0;
}
.io2-care-service-card p {
  margin-top: 0;
}
.io2-care-service-card .io2-care-service-note {
  margin-top: auto;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ob-ink);
  opacity: 0.8;
  text-align: left;
}
.io2-doc-section-module-nine .io2-doc-copy,
.io2-doc-section-module-nine .io2-doc-copy h2,
.io2-doc-section-module-nine .io2-doc-copy p,
.io2-doc-section-module-nine .io2-doc-copy li {
  color: #002D72;
}
.io2-doc-section-module-nine .io2-doc-copy h2 {
  margin: 0 0 28px;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-doc-section-module-nine .io2-doc-copy p,
.io2-doc-section-module-nine .io2-brush-list li {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-module-nine .io2-brush-list + p {
  margin: 24px 0 0;
}
@media (min-width: 901px) {
  .io2-doc-section-intro .io2-doc-split {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .io2-doc-section-intro .io2-doc-copy {
    max-width: none;
    min-width: 0;
    order: initial;
  }
  .io2-doc-section-benefit .io2-doc-split {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 96px;
  }
  .io2-doc-section-benefit .io2-doc-copy {
    width: auto;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-blue .io2-doc-split {
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 96px;
  }
  .io2-doc-section-blue .io2-doc-copy {
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-four .io2-doc-copy {
    width: 100%;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-five .io2-doc-split {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 96px;
  }
  .io2-doc-section-module-five .io2-doc-copy {
    width: 100%;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-six .io2-doc-split {
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 96px;
  }
  .io2-doc-section-module-six .io2-doc-copy {
    width: auto;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-seven .io2-doc-split {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 96px;
  }
  .io2-doc-section-module-seven .io2-doc-copy {
    width: 100%;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-nine .io2-doc-split {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 96px;
  }
  .io2-doc-section-module-nine .io2-doc-copy {
    width: 100%;
    max-width: none;
    min-width: 0;
  }
  .io2-doc-section-module-ten .io2-doc-split {
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 96px;
  }
  .io2-doc-section-module-ten .io2-doc-copy {
    width: 100%;
    max-width: none;
    min-width: 0;
  }
}
.io2-doc-section-benefit .io2-doc-copy {
  width: auto;
  max-width: none;
}
.io2-doc-section-benefit .io2-doc-copy > .section-head {
  margin-bottom: 0;
}
.io2-doc-section-benefit .io2-doc-copy h2 {
  margin: 0 0 28px;
  color: #002D72;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.io2-doc-section-benefit .io2-doc-copy > .section-head > p:not(.io2-footnote) {
  margin-top: 8px;
  color: #002D72;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-benefit .io2-doc-copy > .section-head > .io2-footnote {
  color: #133068;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
  opacity: 0.8;
}
.io2-doc-section-benefit .io2-benefit-title {
  margin: 16px 0 0;
  color: #002D72;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-benefit .io2-benefit-list {
  margin-top: 16px;
}
.io2-doc-section-benefit .io2-benefit-list li {
  color: #002D72;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0;
}
.io2-doc-section-benefit sup {
  position: relative;
  top: -0.35em;
  margin-left: 1px;
  font-size: 0.65em;
  line-height: 0;
}
.io2-doc-section-benefit .io2-benefit-list li::before {
  color: #002D72;
}
.io2-doc-section-benefit .io2-benefit-notes {
  display: grid;
  gap: 2px;
  max-width: 650px;
  margin-top: 36px;
}
.io2-doc-section-benefit .io2-benefit-notes .io2-footnote {
  max-width: 650px;
  margin: 0;
  color: #133068;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
  opacity: 0.5;
  text-align: left;
}
.io2-benefit-grid,
.io2-mode-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 42px;
}
.io2-benefit-title {
  margin: 46px 0 0;
  color: var(--io2-blue);
  font-size: 28px;
}
.io2-benefit-grid article,
.io2-mode-grid article {
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--io2-line);
  border-radius: 24px;
  background: #fff;
}
.io2-benefit-grid article:nth-child(2),
.io2-benefit-grid article:nth-child(4) {
  transform: translateY(22px);
}
.io2-benefit-grid h3,
.io2-mode-grid h3 {
  margin-top: 26px;
  color: var(--io2-blue);
  font-size: 21px;
  line-height: 1.35;
}
.io2-benefit-grid b,
.io2-mode-grid span {
  color: #4a7ea4;
  font-size: 13px;
  font-weight: 700;
}
.io2-centered-note {
  max-width: 820px;
  margin: 54px auto 0;
  text-align: center;
}
.io2-io-mark {
  position: absolute;
  width: 94px !important;
  margin: -260px 0 0 -230px;
  filter: brightness(0) invert(1);
}
.io2-check-list,
.io2-brush-list,
.io2-summary ul {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.io2-check-list li::before,
.io2-brush-list li::before {
  display: inline-block;
  width: 24px;
  margin-right: 8px;
  color: #4aa8c8;
  content: "✓";
  font-weight: 800;
}
.io2-doc-section-blue .io2-check-list li::before {
  color: #9de6f5;
}
.io2-doc-section-module-four .io2-check-list li::before {
  color: #002D72;
}
.io2-doc-section-module-five .io2-check-list li::before {
  color: #fff;
}
.io2-doc-section-module-six .io2-check-list li::before {
  color: #002D72;
}
.io2-doc-section-module-ten .io2-check-list li::before {
  color: #002D72;
}
.io2-doc-section-module-nine .io2-brush-list li::before {
  color: #002D72;
}
.io2-pressure-art {
  position: relative;
  overflow: hidden;
}
.io2-pressure-art img {
  height: 360px;
}
.io2-pressure-ring {
  position: absolute;
  top: 24px;
  right: 30px;
  display: grid;
  width: 86px;
  height: 86px;
  place-items: center;
  border: 1px solid #4aa8c8;
  border-radius: 50%;
  color: #4aa8c8;
  font-size: 10px;
  letter-spacing: 0.12em;
}
.io2-brush-art img {
  height: 420px;
}
.io2-mode-grid {
  grid-template-columns: repeat(3, 1fr);
}
.io2-mode-grid article {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.1);
}
.io2-mode-grid h3 {
  color: #fff;
}
.io2-mode-grid p {
  color: rgba(255, 255, 255, 0.82);
}
.io2-head-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  border-radius: 28px;
}
.io2-head-grid img {
  width: 100%;
  height: 330px;
}
.io2-summary {
  padding: clamp(76px, 10vw, 138px) 0;
  color: #fff;
  background: #071b35;
}
.io2-summary-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(34px, 6vw, 72px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 34px;
  background: radial-gradient(circle at 88% 8%, rgba(96, 200, 227, 0.24), transparent 35%), #0d2a4e;
}
.io2-summary h2 {
  margin: 16px 0 34px;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.12;
}
.io2-summary li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  font-size: clamp(17px, 2vw, 22px);
}
.io2-summary li:last-child {
  border-bottom: 0;
}
.io2-document-page a:focus-visible {
  outline: 3px solid #5bd3ec;
  outline-offset: 4px;
}
@media (prefers-reduced-motion: reduce) {
  .io2-document-page *,
  .io2-document-page *::before,
  .io2-document-page *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
@media (max-width: 900px) {
  .io2-document-hero-grid,
  .io2-doc-split {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .io2-document-visual {
    min-height: 440px;
  }
  .io2-document-hero .io2-document-visual {
    min-height: 0;
  }
  .io2-document-hero .io2-document-visual img {
    height: auto;
    max-height: 100%;
    max-width: 100%;
  }
  .io2-document-visual img {
    height: 390px;
  }
  .io2-document-copy {
    width: 100%;
  }
  .io2-doc-section-benefit .io2-doc-copy {
    width: 100%;
    max-width: 100%;
  }
  .io2-doc-split-reverse > :first-child,
  .io2-doc-split-reverse > :last-child {
    order: initial;
  }
  .io2-benefit-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .io2-site .breadcrumb {
    top: 132px;
  }
  .io2-document-hero {
    padding: 214px 0 60px;
  }
  .io2-document-copy h1 {
    font-size: 44px;
  }
  .io2-document-visual {
    min-height: 340px;
  }
  .io2-document-hero .io2-document-visual {
    min-height: 0;
  }
  .io2-document-hero .io2-document-visual img {
    height: auto;
    max-height: 100%;
    max-width: 100%;
  }
  .io2-document-visual img {
    height: 300px;
  }
  .io2-doc-section {
    padding: 72px 0;
  }
  .io2-doc-art {
    min-height: 300px;
    padding: 18px;
  }
  .io2-benefit-grid,
  .io2-mode-grid,
  .io2-care-service-grid {
    grid-template-columns: 1fr;
  }
  .io2-benefit-grid article:nth-child(2),
  .io2-benefit-grid article:nth-child(4) {
    transform: none;
  }
  .io2-head-grid img {
    height: 250px;
  }
  .io2-summary-inner {
    padding: 30px 22px;
    border-radius: 24px;
  }
}
/* 官方购买渠道卡 */
.channel-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #eef2f8;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 33, 68, 0.06);
  transition: all 0.25s;
  text-decoration: none;
  color: inherit;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
.channel-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 33, 68, 0.12);
  border-color: #d6e2f5;
}
.channel-logo {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 14px;
}
.channel-platform {
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  font-family: "SourceHanSansCN", sans-serif;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}
.channel-body {
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.channel-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: #002D72;
  margin-bottom: 10px;
  line-height: 1.3;
}
.channel-body p {
  font-size: 13px;
  color: rgba(19, 48, 104, 0.8);
  line-height: 1.5;
  margin-bottom: 16px;
}
.channel-go {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: #002D72;
  transition: gap 0.2s;
  align-self: flex-start;
}
/* 非flex卡片内复用「前往购买」按钮样式：固定与副文本的16px间距 */
.card .channel-go {
  margin-top: 16px;
  align-self: auto;
}
.credentials-page .card {
  display: flex;
  flex-direction: column;
}
.credentials-page .card .channel-go,
.credentials-page .card .card-link {
  margin-top: auto;
  padding-top: 12px;
}
.card:hover .channel-go {
  gap: 10px;
}
.card:hover .channel-go .arr {
  transform: translateX(2px);
}
.channel-card:hover .channel-go {
  gap: 10px;
}
.channel-go .arr {
  transition: transform 0.2s;
}
.channel-card:hover .channel-go .arr {
  transform: translateX(2px);
}

/* ---------- 徽章/信任标 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ob-blue);
  background: var(--ob-blue-light);
  padding: 5px 12px;
  border-radius: 999px;
}
.pill.green { color: #0a7d3c; background: #e5f6ec; }
.pill.amber { color: #b26a00; background: #fdf0d9; }

/* ---------- 对比表 ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--ob-line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
/* ---------- 圆头对比表格 ---------- */
#round-compare .section-head {
  margin-bottom: 32px;
}
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.6;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
#round-compare .cmp-table {
  table-layout: fixed;
}
#round-compare .cmp-table th:first-child,
#round-compare .cmp-table td:first-child {
  width: 15%;
}
#round-compare .cmp-table th:not(:first-child),
#round-compare .cmp-table td:not(:first-child) {
  width: 28.3333%;
}
.cmp-table thead th {
  font-size: 14px;
  font-weight: 700;
  text-align: left;
  vertical-align: top;
  padding: 16px 24px;
  color: #fff;
  background: #002D72;
  border-bottom: none;
}
.cmp-table thead th:nth-child(2) {
  background: #002D72;
}
.cmp-table tbody td {
  font-size: 15px;
  font-weight: 400;
  padding: 16px 24px;
  color: var(--ob-ink);
  border-bottom: 1px solid #EEF2F8;
  vertical-align: top;
}
.cmp-table tbody tr:last-child td { border-bottom: none; }
.cmp-table .cmp-dim {
  font-weight: 700;
  color: #002D72;
  width: 16%;
}
.cmp-table .cmp-trademark {
  font-size: 8px;
  font-weight: 800;
  line-height: 0;
  margin: 0 0.2em;
  position: relative;
  top: -0.3em;
  vertical-align: super;
}
.cmp-table .cmp-ok {
  background: #EBF5FF;
  color: #002D72;
  width: 38%;
}
.cmp-table .cmp-no {
  color: var(--ob-gray);
  width: 46%;
}
#issue-brush-guide .cmp-table {
  table-layout: fixed;
}
#issue-brush-guide .cmp-table th,
#issue-brush-guide .cmp-table td {
  width: 50%;
}

/* ---------- iO 参数表格局部样式 ---------- */
#io-specs .cmp-table {
  table-layout: fixed;
}
#io-specs .cmp-table thead th,
#io-specs .cmp-table tbody td {
  text-align: left;
}
#io-specs .cmp-table thead th:first-child,
#io-specs .cmp-table tbody td:first-child {
  width: 20%;
  background: #EBF5FF;
}
#io-specs .cmp-table thead th:first-child {
  background: #002D72;
}
#io-specs .cmp-table thead th:nth-child(2) {
  background: #002D72;
}
#io-specs .cmp-table thead th:not(:first-child),
#io-specs .cmp-table tbody td:not(:first-child) {
  width: 16%;
}
#io-specs .cmp-table tbody td {
  background: #fff;
}
#io-specs .cmp-table tbody td:first-child {
  background: #EBF5FF;
}

/* ---------- Issue 决策器 ---------- */
.issue-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.issue-card {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
  border-top: 4px solid var(--ob-blue);
}
.issue-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.issue-card .ic {
  position: relative;
  height: 150px;
  border-radius: 12px;
  margin-bottom: 18px;
  background: #eef2f7;
  display: flex;
  align-items: center;
  justify-content: center;
}
.issue-card .ic::before {
  content: "";
  width: 52px;
  height: 52px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aab4bf' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Ccircle cx='8.5' cy='9.5' r='1.6'/%3E%3Cpath d='M21 15l-4.5-4.5L7 20'/%3E%3C/svg%3E") center/contain no-repeat;
}
.issue-card .ic::after {
  content: "配图";
  position: absolute;
  bottom: 12px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 2px;
  color: #aeb9c4;
}
.issue-card h3 { font-size: 20px; margin-bottom: 12px; }
.issue-card .benefit {
  font-size: 14px;
  color: var(--ob-gray);
  margin-bottom: 14px;
}
.issue-card .rec {
  font-size: 13px;
  background: var(--ob-blue-light);
  color: var(--ob-blue-dark);
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 600;
}
.issue-card .rec b { color: var(--ob-blue); }

/* ---------- FAQ 手风琴 ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
}
.faq-item:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
  border-color: var(--ob-line);
}
.faq-item.open {
  border-color: var(--ob-line);
  box-shadow: var(--shadow-sm);
}
#faqs .section-head {
  margin-bottom: 32px;
}
.faq-module .section-head {
  margin-bottom: 32px;
}
#round-compare .section-head,
#io-series .section-head,
#why-trust .section-head,
#channels .section-head {
  margin-bottom: 32px;
}
#why-io2 {
  background: var(--ob-bg);
}
#why-io2 .section-head {
  text-align: left;
  width: 100%;
  max-width: none;
  margin-bottom: 48px;
}
#why-io2 .section-head h2 {
  display: block;
  width: 100%;
  max-width: none;
  font-size: 26px;
  font-weight: 800;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
#why-io2 .section-head h2 sup.title-sup {
  font-size: 12px;
  font-weight: 600;
  vertical-align: super;
  position: relative;
  top: -8px;
  margin-right: 4px;
}
#why-io2 .card-media {
  aspect-ratio: 1/1;
}
#why-io2 .card h3 {
  font-weight: 700;
  color: #002D72;
}
#why-io2 .card > h3,
#why-io2 .card > p {
  text-align: left;
}
#why-io2 .card {
  display: flex;
  flex-direction: column;
}
#why-io2 .card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ob-gray);
}
#why-io2 .io2-merged-placeholder {
  display: grid;
  place-items: center;
  background: #eef3fa;
}
#why-io2 .io2-pressure-image {
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}
#why-io2 .io2-round-head-image {
  background: #fff center / cover no-repeat;
}
#why-io2 .io2-merged-placeholder span {
  color: #6f879d;
  font-size: 14px;
  font-weight: 600;
}
.faq-q {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 16px;
  padding: 20px 28px 8px;
  cursor: default;
  font-weight: 700;
  font-size: 17px;
}
.faq-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--ob-blue);
  letter-spacing: 0.5px;
  flex-shrink: 0;
  line-height: 1;
}
.faq-q .plus {
  display: none;
}
.faq-q .plus::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: -3px;
  border-right: 2px solid var(--ob-blue);
  border-bottom: 2px solid var(--ob-blue);
  transform: rotate(45deg);
}
.faq-item.open .faq-q {
  color: var(--ob-blue);
}
.faq-a {
  max-height: 400px;
  overflow: hidden;
  color: var(--ob-gray);
  font-size: 15px;
}
.faq-item.open .faq-a { max-height: 400px; }
.faq-a .inner { padding: 0 28px 20px 67px; color: var(--ob-ink); }

/* ---------- Tab ---------- */
.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  justify-content: center;
}
.tab {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--ob-line);
  background: #fff;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.18s;
  color: var(--ob-ink);
}
.tab:hover { border-color: var(--ob-blue); }
.tab.active {
  background: var(--ob-blue);
  color: #fff;
  border-color: var(--ob-blue);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- CTA 大条 ---------- */
.cta-band {
  background: linear-gradient(135deg, #133068 0%, #002144 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 30px 48px;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 204px;
  align-items: center;
  gap: 48px;
}
.cta-band::before {
  content: none;
}
.cta-band::after {
  content: none;
}
.cta-band > * {
  position: relative;
  z-index: 1;
}
.cta-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
/* CTA 满版背景图变体（产品选购中心用） */
.cta-band.cta-band-full {
  position: relative;
  border-radius: var(--radius);
  padding: 0;
  display: block;
  background: #002D72;
  overflow: hidden;
}
.cta-band-full .cta-bg-img {
  width: 100%;
  height: auto;
  display: block;
}
.cta-band-full .cta-copy {
  position: absolute;
  top: 50%;
  left: 64px;
  transform: translateY(-50%);
  max-width: var(--maxw);
  width: calc(100% - 160px);
  margin: 0;
}
.cta-band h2 {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  text-align: left;
  font-family: "SourceHanSansCN", sans-serif;
}
.cta-band p {
  margin: 0;
  color: #fff;
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
}
.cta-actions {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.cta-visual {
  grid-column: 2;
  justify-self: end;
  align-self: center;
  width: min(204px, 100%);
  height: auto;
}
.cta-band .cta-actions .btn-ghost {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.9);
}
.cta-band .cta-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 45, 114, 0.25);
}

/* ---------- 信任 logo 条 ---------- */
.trust-strip {
  background: #fff;
  padding: 23px 0;
}
.trust-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.trust-strip .t {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ob-gray);
  font-weight: 700;
  font-size: 15px;
}
.trust-strip .t b { color: var(--ob-blue); font-size: 22px; }

/* trust-strip 内的徽章：图标 + 文字左右排版 */
.trust-strip .hero-badge-item {
  flex: 0 1 auto;
  flex-direction: row;
  align-items: center;
  text-align: left;
  gap: 12px;
  min-width: 0;
  padding: 0;
}
.trust-strip .hero-badge-item:first-child {
  transform: none;
}
.trust-divider {
  width: 1px;
  align-self: stretch;
  background: rgba(19, 48, 104, 0.1);
  flex: 0 0 auto;
}
.trust-strip .hero-badge-img {
  height: 48px;
  width: 48px;
  flex-shrink: 0;
}
.trust-strip .hero-badge-text {
  flex: 1;
  min-width: 0;
}
.trust-strip .hero-badge-label {
  margin-top: 0;
  font-size: 15px;
  line-height: 1.3;
  color: var(--ob-blue);
}
.trust-strip .hero-badge-disclaimer {
  display: none;
}
.trust-strip-disclaimer {
  flex-basis: 100%;
  margin-top: 8px;
  text-align: left;
}
.trust-strip-disclaimer p {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ob-ink);
  opacity: 0.8;
  text-align: left;
}

/* ---------- 圆头模块 ---------- */
.round-bg-wrap {
  background-color: #C7CDD9;
  background-position: right center;
  background-size: auto 100%;
  background-repeat: no-repeat;
  border-radius: 16px;
  min-height: 530px; /* 716/1620 × 1200px */
  padding: 40px 40px 30px 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin-bottom: 0;
}
.round-4bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  max-width: 720px;
  align-self: flex-start;
  width: 100%;
}
.round-4item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 24px;
  position: relative;
}
.round-4item:nth-child(odd)::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: #c8cdd6;
}
.round-4item:nth-child(-n+2)::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: #c8cdd6;
}
.round-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid var(--ob-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 900;
  color: var(--ob-blue);
  flex-shrink: 0;
  letter-spacing: -0.5px;
}
.round-4text b {
  font-size: 15px;
  font-weight: 700;
  color: var(--ob-ink);
  line-height: 1.5;
}
.round-feat {
  text-align: left;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--ob-line);
}
.round-icon {
  font-size: 13px;
  font-weight: 800;
  color: var(--ob-blue);
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--ob-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}
.round-feat b {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ob-ink);
  margin-bottom: 6px;
}
.round-feat p {
  font-size: 13px;
  color: var(--ob-gray);
  margin: 0;
  line-height: 1.5;
}
.round-vs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 30px;
  align-items: stretch;
  margin-top: 0;
  position: relative;
}
.round-vs-item {
  border-radius: 16px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
}
.round-vs-item ul {
  margin: 12px 0 0;
  padding-left: 0;
  list-style: none;
}
.round-vs-item li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  line-height: 1.4;
  padding: 4px 0;
}
.round-vs-item li svg {
  flex-shrink: 0;
  align-self: center;
}
.round-vs-label {
  font-weight: 800;
  font-size: 17px;
}
.round-vs-good {
  background: linear-gradient(135deg, #133068 0%, #002144 100%);
  color: #fff;
  padding-left: 44px;
}
.round-vs-good .round-vs-label { color: #fff; }
.round-vs-good li { color: rgba(255,255,255,0.85); }
.round-vs-bad {
  background: linear-gradient(135deg, #bdc6d3 0%, #e1e2e6 100%);
  color: var(--ob-ink);
  text-align: left;
  padding-left: 44px;
}
.round-vs-bad .round-vs-label { color: var(--ob-gray); text-align: left; }
.round-vs-bad li { color: var(--ob-gray); text-align: left; }
.round-vs-bad ul { padding-left: 0; list-style: none; }
.round-vs-badge {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--ob-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 900;
  color: var(--ob-gray);
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
}

/* ---------- 品牌历史时间轴 ---------- */
.timeline {
  display: flex;
  position: relative;
  align-items: stretch;
  padding: 0 32px 0 0;
  justify-content: space-between;
  gap: 8px;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 32px;
  height: 1.5px;
  transform: translateY(-50%);
  background: linear-gradient(to right, transparent 0%, #bbc8d8 8%, #bbc8d8 100%);
  z-index: 0;
}
.timeline::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 24px;
  transform: translateY(-50%);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid #bbc8d8;
  z-index: 1;
}
.tl-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 220px;
}
.tl-item:first-child {
  padding-left: 0;
}
.tl-upper,
.tl-lower {
  flex: none;
  height: 103px;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0 12px 0 0;
  text-align: left;
  overflow: visible;
}
.tl-upper {
  justify-content: flex-end;
  padding-bottom: 12px;
}
.tl-lower {
  justify-content: flex-start;
  padding-top: 12px;
}
.tl-node {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ob-blue);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--ob-blue);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.tl-item--active .tl-node {
  width: 20px;
  height: 20px;
  background: var(--ob-blue);
  box-shadow: 0 0 0 3px var(--ob-blue);
  margin: -3px 0;
}
.tl-year {
  font-size: 14px;
  font-weight: 900;
  color: #ffffff;
  margin: 0 0 2px;
  letter-spacing: -0.3px;
}
.tl-title {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ob-ink);
  margin-bottom: 3px;
  line-height: 1.4;
}
.tl-title::before {
  content: none;
}
.tl-desc {
  font-size: 12px;
  color: #ffffff;
  line-height: 1.6;
  margin: 0;
  padding-left: 0;
}

/* ---------- Footer ---------- */
.footer {
  background: #002D72;
  color: #b9d2ee;
  padding: 56px 0 28px;
  margin-top: 0;
}
.footer .cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  letter-spacing: 0.5px;
}
.footer a {
  display: block;
  color: #b9d2ee;
  font-size: 14px;
  padding: 5px 0;
  margin-top: 10px;
  transition: color 0.18s;
}
.footer-nav-parent {
  display: block;
  color: #b9d2ee;
  font-size: 14px;
  padding: 5px 0;
  margin-top: 10px;
}
.footer-nav-link {
  display: block;
  color: #b9d2ee;
  font-size: 14px;
  padding: 5px 0;
  margin-top: 10px;
  transition: color 0.18s;
}
.footer-nav-subitems {
  margin-left: 16px;
}
.footer-nav-subitems a::before {
  content: "•";
  display: inline-block;
  margin-right: 6px;
}
.footer-nav-subitems .footer-nav-link::before {
  content: "•";
  display: inline-block;
  margin-right: 6px;
}
.footer a:hover,
.footer-nav-link:hover { color: #fff; }
.footer .brand { color: #fff; margin-bottom: 12px; }
.footer .brand-logo { height: 34px; }
.footer .brand .dot { box-shadow: inset 0 0 0 3px rgba(255,255,255,.3); }
.footer p.desc { font-size: 14px; color: #9cbbdd; max-width: 300px; }
.footer .bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #8fb0d4;
  flex-wrap: wrap;
  gap: 10px;
}
.footer .bottom > span {
  width: max-content;
  flex: 0 0 max-content;
  white-space: nowrap;
}
.footer .bottom > span a {
  display: inline;
  color: inherit;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  margin: 0;
  padding: 0;
}

/* ---------- 通用工具 ---------- */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.lead-list { list-style: none; }
.lead-list li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 10px;
  color: var(--ob-gray);
}
.lead-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--ob-blue);
  font-weight: 800;
}

/* ============================================================
   SKU 单品详情页
   ============================================================ */
/* 返回按钮 */
.back-bar {
  background: #fff;
  border-bottom: 1px solid var(--ob-line);
}
.back-bar .container {
  padding: 14px 24px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ob-blue);
  cursor: pointer;
}
.back-link:hover {
  gap: 10px;
}
/* 通用图片占位符 */
.img-ph {
  position: relative;
  background: #eef2f7;
  display: flex;
  align-items: center;
  justify-content: center;
}
.img-ph::before {
  content: "";
  width: 22%;
  max-width: 72px;
  min-width: 34px;
  aspect-ratio: 1 / 1;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aab4bf' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Ccircle cx='8.5' cy='9.5' r='1.6'/%3E%3Cpath d='M21 15l-4.5-4.5L7 20'/%3E%3C/svg%3E") center/contain no-repeat;
}
.img-ph[data-label]::after {
  content: attr(data-label);
  position: absolute;
  bottom: 12px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 2px;
  color: #aeb9c4;
}

/* Hero 区 */
.sku-hero {
  padding: 116px 0 56px;
  margin-top: -80px;
}
.sitemap-hero {
  padding: 116px 0 56px;
  margin-top: -80px;
  background: #06001C;
  color: #fff;
}
.sku-hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.gallery-main {
  height: 460px;
  border-radius: var(--radius);
  border: 1px solid var(--ob-line);
}
.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.gallery-thumbs .img-ph {
  height: 84px;
  border-radius: 10px;
  border: 1px solid var(--ob-line);
  cursor: pointer;
  transition: border-color 0.18s;
}
.gallery-thumbs .img-ph:hover,
.gallery-thumbs .img-ph.active {
  border-color: var(--ob-blue);
}

.sku-info .sku-eyebrow {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ob-blue);
}
.sku-info h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 8px 0 12px;
  line-height: 1.2;
  font-family: "SourceHanSansCN", sans-serif;
}
.rating {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ob-gray);
}
.stars {
  color: #f5a623;
  letter-spacing: 2px;
  font-size: 16px;
}
.rating a {
  color: var(--ob-blue);
  font-weight: 600;
}
.price-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 20px 0;
  padding: 18px 0;
  border-top: 1px solid var(--ob-line);
  border-bottom: 1px solid var(--ob-line);
}
.price-row .now {
  font-size: 34px;
  font-weight: 800;
  color: var(--ob-red);
}
.price-row .was {
  font-size: 16px;
  color: #9aa7b4;
  text-decoration: line-through;
}
.price-row .save {
  font-size: 13px;
  font-weight: 700;
  color: var(--ob-red);
  background: #fdeaee;
  padding: 4px 10px;
  border-radius: 999px;
}
.sku-bullets {
  list-style: none;
  margin: 20px 0;
}
.sku-bullets li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--ob-ink);
  font-size: 15px;
}
.sku-bullets li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--ob-blue);
  font-weight: 800;
}
.variant {
  margin: 22px 0;
}
.variant .lbl {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
}
.variant .lbl span {
  color: var(--ob-gray);
  font-weight: 500;
}
.swatches {
  display: flex;
  gap: 10px;
}
.swatch {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  box-shadow: inset 0 0 0 2px #fff;
  outline: 1px solid var(--ob-line);
}
.swatch.active {
  border-color: var(--ob-blue);
}
.buy-row {
  display: flex;
  align-items: stretch;
  gap: 12px;
  margin: 24px 0;
  flex-wrap: wrap;
}
.qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--ob-line);
  border-radius: 999px;
  overflow: hidden;
}
.qty button {
  width: 42px;
  height: 48px;
  border: none;
  background: #fff;
  font-size: 20px;
  color: var(--ob-ink);
  cursor: pointer;
}
.qty button:hover { background: var(--ob-blue-light); color: var(--ob-blue); }
.qty span {
  width: 44px;
  text-align: center;
  font-weight: 700;
  font-size: 16px;
}
.buy-row .btn { height: 48px; }
.buy-row .btn-cart { flex: 1; min-width: 150px; }
.buy-row .btn-buy {
  flex: 1;
  min-width: 150px;
  background: var(--ob-red);
  color: #fff;
  box-shadow: 0 6px 18px rgba(228, 0, 43, 0.28);
  justify-content: center;
}
.buy-row .btn-buy:hover { background: #c40025; transform: translateY(-2px); }
.assurance {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}
.assurance .a {
  text-align: center;
  font-size: 12px;
  color: var(--ob-gray);
  background: var(--ob-bg);
  border: 1px solid var(--ob-line);
  border-radius: 12px;
  padding: 12px 6px;
}
.assurance .a b {
  display: block;
  font-size: 13px;
  color: var(--ob-ink);
  margin-bottom: 2px;
}

/* 锚点子导航 */
.subnav {
  position: sticky;
  top: 68px;
  z-index: 80;
  background: #fff;
  border-top: 1px solid var(--ob-line);
  border-bottom: 1px solid var(--ob-line);
}
.subnav .container {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}
.subnav a {
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ob-ink);
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
.subnav a:hover { color: var(--ob-blue); }

/* 核心亮点 alternating */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}
.feature-row:nth-child(even) .feature-media { order: 2; }
.feature-media {
  height: 340px;
  border-radius: var(--radius);
  border: 1px solid var(--ob-line);
}
.feature-row h3 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 12px;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
.feature-row p {
  color: var(--ob-gray);
  font-size: 16px;
}

/* 技术规格 */
.spec-table th {
  width: 30%;
  color: var(--ob-blue-dark);
  background: var(--ob-blue-light);
  font-weight: 700;
}

/* 包装清单 */
.box-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.box-item {
  text-align: center;
}
.box-item .img-ph {
  height: 150px;
  border-radius: var(--radius);
  border: 1px solid var(--ob-line);
  margin-bottom: 12px;
}
.box-item b { display: block; font-size: 15px; }
.box-item span { font-size: 13px; color: var(--ob-gray); }

/* 用户评价 */
.review-summary {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}
.review-score {
  text-align: center;
  border-right: 1px solid var(--ob-line);
}
.review-score .big {
  font-size: 56px;
  font-weight: 800;
  color: var(--ob-ink);
  line-height: 1;
}
.review-bars .bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--ob-gray);
}
.review-bars .track {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: var(--ob-line);
  overflow: hidden;
}
.review-bars .fill {
  height: 100%;
  background: #f5a623;
  border-radius: 999px;
}
.review-card {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.review-card .head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.review-card .who { font-weight: 700; }
.review-card .date { font-size: 13px; color: #9aa7b4; }
.review-card p { color: var(--ob-gray); font-size: 15px; margin-top: 6px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-claim { font-size: 56px; }
  .grid-3, .grid-4, .issue-nav { grid-template-columns: repeat(2, 1fr); }
  .cred-strip { flex-wrap: wrap; }
  .cred-strip-item { flex: 1 1 50%; }
  .cred-strip-item:nth-child(3) { border-left: none; }
  .footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 960px) {
  .mega { display: none; }
  .product-menu {
    grid-template-columns: 1fr;
    gap: 24px;
    width: 100%;
    max-width: none;
    padding: 20px;
  }
  .product-menu-secondary {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
    height: auto;
  }
  .product-menu-secondary .product-menu-card {
    display: flex !important;
    gap: 10px;
  }
  .nav-trigger .caret { display: none; }
  .sku-hero .container { grid-template-columns: 1fr; gap: 28px; }
  .product-menu-secondary .product-menu-card:first-child {
    align-self: start;
  }
  .product-menu-secondary .product-menu-card:last-child {
    align-self: end;
  }
  .gallery-main { height: 360px; }
  .feature-row { grid-template-columns: 1fr; gap: 24px; }
  .feature-row:nth-child(even) .feature-media { order: 0; }
  .box-grid { grid-template-columns: repeat(2, 1fr); }
  .review-summary { grid-template-columns: 1fr; }
  .review-score { border-right: none; border-bottom: 1px solid var(--ob-line); padding-bottom: 20px; }
}
@media (max-width: 640px) {
  .nav { height: auto; }
  .nav .container { flex-wrap: wrap; height: auto; padding: 12px 0; }
  .nav-links { width: 100%; margin: 8px 0 0; }
  .product-menu {
    top: calc(100% + 8px);
  }
  .product-menu-primary {
    gap: 12px;
  }
  .product-menu-secondary {
    gap: 12px;
  }
  .grid-2, .grid-3, .grid-4, .issue-nav, .footer .cols { grid-template-columns: 1fr; }
  .health-bento { grid-template-columns: 1fr; }
  .health-card-big { flex-direction: column; }
  .health-card-big .health-media { min-height: 240px; }
  .section-head h2 { font-size: 28px; }
  .hero-claim { font-size: 44px; }
  /* hero-bg 在手机铺满，object-fit:cover 保证等比不变形 */
  .hero-bg {
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: right center;
  }
  .round-head { width: 240px; height: 240px; }
  .assurance { grid-template-columns: repeat(2, 1fr); }
  .box-grid { grid-template-columns: 1fr 1fr; }
  .sku-info h1 { font-size: 28px; }
  .subnav { top: 0; }
}

/* ---------- 活动新闻稿 · 轮播 ---------- */
.news-carousel {
  position: relative;
  max-width: 1040px;
  margin: 40px auto 0;
  padding: 0 56px;
}
.news-viewport {
  overflow: hidden;
  border-radius: 24px;
}
.news-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.news-slide {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: center;
  padding: 48px 52px;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(10, 37, 64, 0.08);
}
.news-text h3 {
  margin: 18px 0 14px;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
.news-text p {
  color: var(--ob-gray);
  line-height: 1.8;
  margin-bottom: 26px;
}
.news-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--ob-blue-dark);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.news-btn:hover {
  background: var(--ob-blue);
  transform: translateY(-2px);
}
.news-media {
  height: 240px;
  border-radius: 16px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 16px;
}
.news-media span {
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}
.news-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 10px;
  background: var(--ob-blue-light);
  color: var(--ob-blue);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s, color 0.2s;
}
.news-arrow:hover {
  background: var(--ob-blue);
  color: #fff;
}
.news-prev { left: 0; }
.news-next { right: 0; }
.news-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}
.news-dots button {
  width: 34px;
  height: 5px;
  border: none;
  border-radius: 999px;
  background: var(--ob-blue-dark);
  opacity: 0.35;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s, background 0.2s;
}
.news-dots button.active {
  opacity: 1;
  background: #2ea6ff;
}
@media (max-width: 720px) {
  .news-carousel { padding: 0 40px; }
  .news-slide { grid-template-columns: 1fr; gap: 24px; padding: 32px 28px; }
  .news-media { height: 180px; order: -1; }
  .news-text h3 { font-size: 24px; }
}

/* ============================================================
   全站移动端增强
   仅在 767px 以下生效，桌面端保持原有布局。
   ============================================================ */
@media screen and (max-width: 767px) {
  :root {
    --mobile-gutter: 16px;
  }

  html,
  body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
  }

  html {
    scroll-padding-top: 120px;
  }

  body {
    padding-top: 112px;
  }

  /* 桌面端 160px 留白在手机上会把内容压缩到 280px，改为舒适的 16px 边距。 */
  .container {
    width: min(var(--maxw), calc(100% - (var(--mobile-gutter) * 2)));
    max-width: 100%;
  }

  /* 两行导航：品牌固定在第一行，导航链接在第二行横向滑动。 */
  .nav {
    top: 8px;
  }

  .nav .container {
    width: calc(100% - 20px);
    min-height: 52px;
    height: auto;
    padding: 8px 10px;
    gap: 4px 10px;
    flex-wrap: wrap;
    overflow: hidden;
    border-radius: 22px;
  }

  .nav .container::before {
    inset: -2px -6px;
    border-radius: 22px;
  }

  .brand {
    flex: 0 0 auto;
  }

  .brand-logo {
    height: 32px;
  }

  .nav-links {
    order: 2;
    flex: 0 0 100%;
    width: 100%;
    min-width: 0;
    margin: 2px 0 0;
    padding: 0 0 2px;
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    flex: 0 0 auto;
    padding: 9px 12px;
    font-size: 13px;
    white-space: nowrap;
  }

  .nav-item {
    flex: 0 0 auto;
  }

  .mega,
  .product-menu {
    display: none !important;
  }

  /* 首页与子页大图：取消固定视口高度，让中文内容自然撑开。 */
  .hero,
  .pagehead {
    margin-top: -112px;
    min-height: 0;
    padding-top: 152px;
    padding-bottom: 56px;
    align-items: flex-start;
  }

  .hero .container,
  .pagehead .container {
    display: block;
    padding-top: 28px;
    padding-bottom: 20px;
  }

  .hero-bg,
  .pagehead-bg {
    right: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 72% center;
  }

  .pagehead-bg {
    opacity: 0.2;
    -webkit-mask-image: none;
    mask-image: none;
  }

  .pagehead .container {
    padding: 24px 20px 28px;
    border: 1px solid rgba(0, 45, 114, 0.1);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 12px 32px rgba(0, 45, 114, 0.08);
  }

  .hero-claim,
  .pagehead h1 {
    max-width: 100%;
    font-size: clamp(34px, 9.5vw, 46px);
    line-height: 1.18;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .hero-pretitle {
    font-size: clamp(24px, 6vw, 32px);
  }

  .hero-desc,
  .hero-disclaimer,
  .pagehead p,
  .pagehead .pagehead-disclaimer {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .hero-desc,
  .pagehead p {
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-cta {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .hero-cta .btn,
  .hero-cta a {
    width: 100%;
    max-width: 320px;
  }

  .hero-badges {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    max-width: 100%;
    margin-top: 28px;
  }

  .hero-badge-img {
    height: 84px;
    max-width: 100%;
  }

  .hero-badge-label {
    font-size: 12px;
  }

  /* 通用段落与标题在窄屏下避免撑破卡片。 */
  .section {
    padding: 56px 0;
  }

  .section-head {
    max-width: 100%;
    margin-bottom: 30px;
  }

  .section-head h2,
  .cred-head h2 {
    font-size: clamp(24px, 7vw, 32px);
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  .section-head p,
  .cred-head p {
    font-size: 15px;
    line-height: 1.7;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .issue-nav,
  .endorse-grid,
  .footer .cols,
  .io2-benefit-grid,
  .io2-care-service-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .issue-card,
  .endorse-card {
    min-width: 0;
    padding: 22px;
  }

  .card-media {
    margin: -22px -22px 18px;
  }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-row:nth-child(even) .feature-media {
    order: 0;
  }

  .feature-media {
    height: min(280px, 70vw);
  }

  .box-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .box-item .img-ph {
    height: 120px;
  }

  /* iO 系列产品页：图片、标题、正文单列排列，取消桌面端最小列宽。 */
  .io2-document-hero {
    padding: 72px 0 56px;
  }

  .io2-document-hero-grid,
  .io2-doc-split,
  .io2-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .io2-document-visual,
  .io2-document-hero .io2-document-visual {
    width: 100%;
    min-height: 0;
    aspect-ratio: 1 / 1;
    max-height: 78vw;
  }

  .io2-document-hero .card {
    padding: 16px;
  }

  .io2-document-hero .card-media {
    margin: -16px;
    width: calc(100% + 32px);
  }

  .io2-document-copy,
  .io2-document-copy h1 {
    width: 100%;
    max-width: 100%;
  }

  .io2-document-copy h1 {
    font-size: clamp(32px, 9vw, 44px);
    line-height: 1.24;
    overflow-wrap: anywhere;
  }

  .io2-document-copy > p,
  .io2-document-page p,
  .io2-document-page li {
    font-size: 15px;
    line-height: 1.75;
    overflow-wrap: anywhere;
  }

  .io2-document-copy > p.io2-hero-question {
    font-size: 18px;
    white-space: normal;
  }

  .io2-doc-section {
    padding: 56px 0;
  }

  .io2-doc-art {
    min-height: 240px;
    max-width: 100%;
  }

  .io2-head-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .io2-head-grid img {
    width: 100%;
    height: auto;
    min-height: 0;
  }

  /* 规格表保留完整信息，在容器内横向滑动而不是把页面撑宽。 */
  .table-wrap,
  #round-compare .container,
  #io-specs .container {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .cmp-table {
    min-width: 620px;
  }

  .ref-item,
  .ref-slide {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px;
  }

  .ref-slide-src {
    border-right: 0;
    border-bottom: 1px solid var(--ob-line);
    padding: 0 0 14px;
  }

  .ref-item .ref-link {
    white-space: normal;
  }

  .ref-carousel,
  .news-carousel {
    padding-left: 32px;
    padding-right: 32px;
  }

  .news-slide {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 20px;
  }

  .news-media {
    height: 170px;
    order: -1;
  }

  .subnav {
    top: 104px;
  }

  .subnav .container {
    width: 100%;
    padding: 0 var(--mobile-gutter);
  }

  .subnav a {
    padding: 13px 12px;
    font-size: 14px;
  }

  .footer {
    padding: 44px 0 24px;
  }

  .footer .bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer .bottom > span {
    width: auto;
    max-width: 100%;
    white-space: normal;
  }
}

@media screen and (max-width: 380px) {
  :root {
    --mobile-gutter: 14px;
  }

  body {
    padding-top: 108px;
  }

  .nav .container {
    width: calc(100% - 16px);
  }

  .nav-links a {
    padding-left: 10px;
    padding-right: 10px;
    font-size: 12px;
  }

  .hero,
  .pagehead {
    margin-top: -108px;
    padding-top: 144px;
  }

  .box-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   专业背书页（credentials）— 各板块差异化排版
   ============================================================ */

/* 板块小标题：左对齐带序号徽章（区别于居中的通用 section-head） */
.cred-head {
  max-width: 760px;
  margin: 0 0 40px;
}
.cred-head .kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--ob-blue);
  text-transform: uppercase;
}
.cred-head .kicker i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--ob-blue-light);
  color: var(--ob-blue);
  font-style: normal;
  font-size: 13px;
  font-weight: 800;
}
.cred-head h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  font-family: "SourceHanSansCN", sans-serif;
}
.cred-head p {
  margin-top: 20px;
  color: var(--ob-gray);
  font-size: 17px;
  line-height: 1.6;
}

/* 01 牙医推荐 — 特色权威卡（大圆形图标 + 居中） */
.endorse-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.endorse-card {
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
}
.endorse-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c9ddf3;
}
.endorse-card .badge {
  width: 68px;
  height: 68px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #4aa3ff, var(--ob-blue) 62%, var(--ob-blue-dark));
  box-shadow: 0 10px 24px rgba(0, 48, 130, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 26px;
}
.endorse-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 14px;
}
.endorse-card p {
  color: var(--ob-gray);
  font-size: 15px;
  line-height: 1.6;
}

/* 02 第三方学术稿件 — 文献引用列表 */
.ref-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.ref-item {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  align-items: center;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-left: 4px solid var(--ob-blue);
  border-radius: 14px;
  padding: 22px 26px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.ref-item:hover {
  border-left-color: var(--ob-cyan);
  box-shadow: var(--shadow-md);
}
.ref-item .src {
  font-size: 13px;
  font-weight: 800;
  color: var(--ob-blue-dark);
  line-height: 1.4;
}
.ref-item .src span {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ob-cyan);
  margin-bottom: 4px;
}
.ref-item .body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.ref-item .body p {
  font-size: 14px;
  color: var(--ob-gray);
  line-height: 1.55;
}
.ref-item .ref-link {
  white-space: nowrap;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 14px;
}

/* 02 学术稿件 — 左右翻页单卡轮播 */
.ref-carousel {
  position: relative;
  padding: 0 60px;
}
.car-viewport {
  overflow: hidden;
  border-radius: var(--radius);
}
.car-track {
  display: flex;
  transition: transform 0.4s ease;
}
.car-slide {
  min-width: 100%;
  box-sizing: border-box;
}
.ref-slide {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 36px;
  align-items: center;
  min-height: 200px;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-left: 4px solid var(--ob-blue);
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
}
.ref-slide-src {
  border-right: 1px solid var(--ob-line);
  padding-right: 28px;
}
.ref-slide-src span {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ob-cyan);
  margin-bottom: 8px;
}
.ref-slide-src b {
  font-size: 22px;
  font-weight: 800;
  color: var(--ob-blue-dark);
  line-height: 1.35;
}
.ref-slide-body h3 {
  font-size: 21px;
  font-weight: 800;
  margin-bottom: 10px;
}
.ref-slide-body p {
  font-size: 15px;
  color: var(--ob-gray);
  line-height: 1.65;
}
.ref-slide-body .ref-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 15px;
}
.car-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--ob-line);
  background: #fff;
  color: var(--ob-blue);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
  z-index: 2;
}
.car-btn:hover {
  background: var(--ob-blue);
  color: #fff;
  border-color: var(--ob-blue);
}
.car-prev { left: 0; }
.car-next { right: 0; }
.car-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}
.car-dots button {
  width: 34px;
  height: 5px;
  border: none;
  border-radius: 999px;
  background: var(--ob-blue-dark);
  opacity: 0.25;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s, background 0.2s;
}
.car-dots button.active {
  opacity: 1;
  background: var(--ob-blue);
}

/* 03 活动新闻稿 — 竖向时间线 */
.news-line {
  position: relative;
  margin-left: 8px;
  padding-left: 34px;
}
.news-line::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--ob-cyan), var(--ob-blue));
}
.news-node {
  position: relative;
  padding: 4px 0 30px;
}
.news-node:last-child { padding-bottom: 0; }
.news-node::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--ob-blue);
}
.news-node .date {
  font-size: 13px;
  font-weight: 800;
  color: var(--ob-cyan);
  letter-spacing: 0.5px;
}
.news-node h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 6px 0 6px;
}
.news-node p {
  font-size: 15px;
  color: var(--ob-gray);
  line-height: 1.6;
  max-width: 640px;
}
.news-node .ref-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 14px;
}

/* 04 临床数据 — 深色数据统计条 */
.stat-band {
  background: linear-gradient(135deg, #0d1424 0%, #0a1226 55%, #071a2e 100%);
  border-radius: 24px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}
.stat-band::after {
  content: "";
  position: absolute;
  right: -100px;
  top: -120px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(0, 169, 224, 0.28), transparent 64%);
  border-radius: 50%;
}
/* 左右布局：数据在左，标题说明在右 */
.stat-band-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 56px 48px;
}
.stat-band-split .stat-data,
.stat-band-split .stat-intro {
  position: relative;
  z-index: 1;
}
.stat-band-split .stat-grid {
  grid-template-columns: 1fr;
  gap: 0;
}
.stat-band-split .stat-cell {
  text-align: left;
  padding: 20px 0;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0;
  background: transparent;
}
.stat-band-split .stat-cell:first-child { padding-top: 0; }
.stat-band-split .stat-cell:last-child { border-bottom: none; padding-bottom: 0; }
.stat-band-split .stat-cell b {
  font-size: 44px;
}
.stat-band-split .stat-cell span {
  margin-top: 4px;
}
.stat-band-split .stat-intro .kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #8fd3ff;
}
.stat-band-split .stat-intro .kicker i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: rgba(143, 211, 255, 0.16);
  color: #8fd3ff;
  font-style: normal;
  font-size: 13px;
  font-weight: 800;
}
.stat-band-split .stat-intro h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-top: 14px;
  color: #fff;
  font-family: "SourceHanSansCN", sans-serif;
}
.stat-band-split .stat-intro > p {
  margin-top: 12px;
  color: #c6d8ec;
  font-size: 17px;
  line-height: 1.6;
}
.stat-band-split .stat-intro .stat-note {
  margin-top: 20px;
  text-align: left;
  color: #7f93ac;
}
.stat-band .stat-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-band .stat-cell {
  text-align: center;
  padding: 12px 10px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.stat-band .stat-cell b {
  display: block;
  font-size: 40px;
  font-weight: 800;
  line-height: 1.1;
  color: #8fd3ff;
}
.stat-band .stat-cell span {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: #c6d8ec;
  line-height: 1.5;
}
.stat-note {
  margin-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--ob-gray);
}

/* 04 v2 — 标题在上，数据一排（无卡片，竖线分隔）浅色 */
.stat-band-v2 {
  background: var(--ob-blue-light);
  padding: 52px 48px;
}
.stat-band-v2::after { content: none; }
.stat-band-v2 .stat-v2-head {
  position: relative;
  z-index: 1;
  margin-bottom: 36px;
}
.stat-band-v2 .stat-v2-head h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  color: var(--ob-ink);
  font-family: "SourceHanSansCN", sans-serif;
}
.stat-band-v2 .stat-v2-head p {
  margin-top: 10px;
  color: var(--ob-gray);
  font-size: 16px;
  line-height: 1.6;
  max-width: 560px;
}
.stat-band-v2 .stat-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-band-v2 .stat-item {
  padding: 4px 28px;
  border-left: 1px solid var(--ob-line);
}
.stat-band-v2 .stat-item:first-child {
  padding-left: 0;
  border-left: none;
}
.stat-band-v2 .stat-item b {
  display: block;
  font-size: 44px;
  font-weight: 800;
  line-height: 1.05;
  color: var(--ob-blue);
}
.stat-band-v2 .stat-item span {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--ob-gray);
  line-height: 1.55;
}
.stat-band-v2 .stat-note {
  position: relative;
  z-index: 1;
  margin-top: 32px;
  text-align: left;
  color: var(--ob-gray);
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.edu-card {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--ob-line);
  border-radius: var(--radius);
  padding: 30px 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s;
}
.edu-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c9ddf3;
}
.edu-card .num {
  position: absolute;
  right: 18px;
  top: 6px;
  font-size: 88px;
  font-weight: 800;
  line-height: 1;
  color: var(--ob-blue-light);
  z-index: 0;
}
.edu-card > * { position: relative; z-index: 1; }
.edu-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
  color: #002D72;
  font-family: "SourceHanSansCN", sans-serif;
}
.edu-card p {
  font-size: 15px;
  color: var(--ob-gray);
  line-height: 1.7;
}
.edu-card .ref-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--ob-blue);
  font-weight: 700;
  font-size: 14px;
}

@media (max-width: 900px) {
  .endorse-grid { grid-template-columns: 1fr; }
  .ref-item { grid-template-columns: 1fr; gap: 10px; }
  .ref-item .ref-link { justify-self: start; }
  .ref-carousel { padding: 0 44px; }
  .ref-slide { grid-template-columns: 1fr; gap: 18px; padding: 28px 24px; }
  .ref-slide-src { border-right: none; border-bottom: 1px solid var(--ob-line); padding-right: 0; padding-bottom: 16px; }
  .stat-band .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-band-split { grid-template-columns: 1fr; gap: 32px; padding: 40px 28px; }
  .stat-band-split .stat-intro { order: -1; }
  .stat-band-v2 { padding: 40px 28px; }
  .stat-band-v2 .stat-row { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .stat-band-v2 .stat-item:nth-child(3) { padding-left: 0; border-left: none; }
  .edu-grid { grid-template-columns: 1fr; }
}

/* ---------- 板块主标题：统一品牌色 + 加粗 ---------- */
.section-head h2,
.cta-band h2 {
  color: #002D72;
  font-weight: 800;
  font-size: 26px;
  font-family: "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
}

/* CTA 标题：白色 */
.cta-band h2 {
  color: #fff;
}

/* ---------- iO2 产品详情页 ---------- */
.io2-page {
  background: var(--ob-bg);
}
.io2-hero {
  padding: 72px 0;
}
.io2-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 72px;
  align-items: center;
}
.io2-hero-copy {
  max-width: 560px;
}
.io2-note {
  max-width: 460px;
  margin-top: 20px;
  color: rgba(19, 48, 104, 0.5);
  font-size: 12px;
  line-height: 1.6;
}
.io2-hero-media {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(145deg, #f0f5fb 0%, #dbe8f7 100%);
}
.io2-hero-media::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
}
.io2-product-image {
  position: relative;
  z-index: 1;
  width: 72%;
  aspect-ratio: 1 / 1;
  background: url('../assets/iO2_Front_WHT-BG_SimpleWhite.png') center / contain no-repeat;
  filter: drop-shadow(0 22px 24px rgba(19, 48, 104, 0.16));
}
.io2-media-label {
  position: absolute;
  right: 24px;
  bottom: 22px;
  z-index: 2;
  color: rgba(0, 45, 114, 0.55);
  font-size: 12px;
  letter-spacing: 1px;
}
.io2-section {
  border-top: 1px solid rgba(19, 48, 104, 0.06);
}
.io2-section-tint {
  background: var(--ob-blue-light);
}
.io2-section .section-head {
  max-width: 800px;
}
.io2-section .section-head h2 {
  line-height: 1.35;
}
.card-kicker,
.io2-panel-number {
  color: var(--ob-cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  font-family: var(--font);
}
.card-kicker {
  margin-bottom: 18px;
}
.io2-spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.io2-spec-card {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.io2-spec-value {
  color: #002D72;
  font-size: 32px;
  font-weight: 800;
  line-height: 1.1;
  font-family: var(--font);
}
.io2-spec-label {
  margin-top: 18px;
  color: var(--ob-ink);
  font-size: 16px;
  font-weight: 700;
}
.io2-spec-card p {
  margin-top: 10px;
  color: var(--ob-gray);
  font-size: 13px;
}
.io2-experience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.io2-experience-panel {
  min-height: 260px;
  padding: 36px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--ob-line);
  box-shadow: var(--shadow-sm);
}
.io2-experience-panel-dark {
  color: #fff;
  background: #002D72;
  border-color: #002D72;
}
.io2-experience-panel h3 {
  margin-top: 46px;
  color: #002D72;
  font-size: 24px;
  line-height: 1.3;
}
.io2-experience-panel-dark h3 {
  color: #fff;
}
.io2-experience-panel p {
  max-width: 520px;
  margin-top: 16px;
  color: var(--ob-gray);
  font-size: 15px;
  line-height: 1.75;
}
.io2-experience-panel-dark p {
  color: rgba(255, 255, 255, 0.78);
}
.io2-channel-grid .card {
  display: flex;
  flex-direction: column;
}
.io2-channel-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  border-radius: 50%;
  color: #fff;
  background: #002D72;
  font-size: 14px;
  font-weight: 700;
}
.io2-channel-card h3 {
  margin-bottom: 12px;
}
.io2-channel-card p {
  color: var(--ob-gray);
}
.io2-channel-card .channel-go {
  margin-top: auto;
  padding-top: 28px;
}
.io2-faq-container {
  max-width: 860px;
}
@media (max-width: 900px) {
  .io2-hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    width: 100%;
    max-width: none;
  }
  .io2-hero-media {
    min-height: 420px;
  }
  .io2-spec-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .io2-hero {
    padding: 44px 0 52px;
  }
  .io2-hero h1 {
    font-size: 42px;
  }
  .io2-hero-lead {
    font-size: 18px;
  }
  .io2-hero-media {
    min-height: 320px;
  }
  .io2-product-image {
    width: 82%;
  }
  .io2-spec-grid,
  .io2-experience-grid {
    grid-template-columns: 1fr;
  }
  .io2-experience-panel {
    min-height: 220px;
    padding: 28px;
  }
}

/* ---------- iO9 产品页：官方购买渠道（双卡片加宽） ---------- */
#io2-channels {
  padding-top: 72px;
}
.io9-channels-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
@media (max-width: 720px) {
  .io9-channels-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   iO9 产品页 · 字体规则
   英文与数字使用 HurmeGeometricSans1，中文使用 SourceHanSansCN
   通过 unicode-range 合成字体族实现混排自动切换
   ============================================================ */

/* 合成字体族：拉丁/数字优先 HurmeGeometricSans1，其余回落 SourceHanSansCN */
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Hairline.otf") format("opentype");
  font-weight: 100;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Thin.otf") format("opentype");
  font-weight: 200;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Light.otf") format("opentype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/SourceHanSansCN-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+4E00-9FFF, U+3000-303F, U+FF00-FFEF;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/SourceHanSansCN-Regular.otf") format("opentype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+4E00-9FFF, U+3000-303F, U+FF00-FFEF;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-SemiBold.otf") format("opentype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/SourceHanSansCN-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+4E00-9FFF, U+3000-303F, U+FF00-FFEF;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Bold.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Black.otf") format("opentype");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/SourceHanSansCN-Bold.otf") format("opentype");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+4E00-9FFF, U+3000-303F, U+FF00-FFEF;
}
@font-face {
  font-family: "IO9Mixed";
  src: url("../fonts/HurmeGeometricSans1-Black.otf") format("opentype");
  font-weight: 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0020-007E, U+00A0-00FF, U+2000-206F;
}

/* iO9 页面统一应用合成字体族，覆盖 iO2 既有字体声明 */
.io9-page,
.io9-page body,
.io9-page .io2-document-page,
.io9-page .io2-document-copy,
.io9-page .io2-document-copy > p,
.io9-page .io2-document-copy .io2-price,
.io9-page .io2-document-copy .io2-price span,
.io9-page .io2-document-copy .io2-price strong,
.io9-page .io2-document-page p,
.io9-page .io2-document-page li,
.io9-page .section,
.io9-page .section h2,
.io9-page .section h3,
.io9-page .section p,
.io9-page .section .eyebrow,
.io9-page .card,
.io9-page .card h3,
.io9-page .card p,
.io9-page .io2-doc-section,
.io9-page .io2-doc-section h2,
.io9-page .io2-doc-section h3,
.io9-page .io2-doc-section p,
.io9-page .io2-brush-title-number,
.io9-page .io2-care-title-number,
.io9-page .io2-summary-title-latin,
.io9-page .io2-summary-item,
.io9-page .io2-summary-item span,
.io9-page .io2-brush-card-note,
.io9-page .io2-care-service-card,
.io9-page .io2-care-service-card h3,
.io9-page .io2-care-service-card p,
.io9-page .io2-care-service-note,
.io9-page .brush-disclaimers,
.io9-page .brush-disclaimers p,
.io9-page .channel-card,
.io9-page .channel-body,
.io9-page .channel-body h3,
.io9-page .channel-go,
.io9-page .io2-footnote {
  font-family: "IO9Mixed", "HurmeGeometricSans1", "SourceHanSansCN", sans-serif;
}

/* iO9 头部标题按字符明确指定字体，避免混合字体族继承错位 */
.io9-page .io2-document-copy h1 {
  font-family: "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
.io9-page .io2-document-copy h1 .io9-brand-lockup {
  display: inline-block;
  white-space: nowrap;
}
.io9-page .io2-document-copy h1 .io9-cn {
  font-family: "SourceHanSansCN", sans-serif;
  font-weight: 700;
}
.io9-page .io2-document-copy h1 .io9-latin {
  font-family: "HurmeGeometricSans1", sans-serif;
  font-weight: 600;
}

/* 移动端收尾覆盖：文件后段的页面专属规则之后仍保持窄屏可读性。 */
@media screen and (max-width: 767px) {
  .section-head h2,
  .cta-band h2,
  .cred-head h2 {
    font-size: clamp(24px, 7vw, 32px);
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  /* 与 .io2-site .io2-document-hero 的桌面选择器保持同等优先级，覆盖其 180px 顶部留白。 */
  .io2-site .io2-document-hero {
    padding: 72px 0 56px;
  }

  .io2-document-copy h1 {
    font-size: clamp(32px, 9vw, 44px);
    line-height: 1.24;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .io2-document-copy > p.io2-hero-question {
    white-space: normal;
  }

  .ref-item .ref-link,
  .io9-page .io2-document-copy h1 .io9-brand-lockup {
    white-space: normal;
  }

  /* 首页健康数据与口腔问题页说明文字在手机上必须允许换行。 */
  .health-card-big .health-list {
    flex-direction: column;
    gap: 12px;
  }

  .health-card-big .health-list li,
  .health-card-big .health-list li span {
    white-space: normal;
  }

  #issue-overview .section-head > p:not(.issue-overview-disclaimer) {
    white-space: normal;
  }

  .tl-item {
    max-width: 100%;
  }

  /* 专业背书页复用首页 Hero 结构，同样将影像与文案分层。 */
  .credentials-page .hero {
    display: block;
    min-height: 0;
    margin-top: -112px;
    padding: 112px 0 0;
    background: #f2f5f9;
  }

  .credentials-page .hero-bg {
    position: relative;
    inset: auto;
    width: calc(100% - 24px);
    height: clamp(220px, 58vw, 280px);
    margin: 12px auto 0;
    border-radius: 20px;
    object-fit: cover;
    object-position: center;
    box-shadow: 0 12px 32px rgba(0, 45, 114, 0.1);
    -webkit-mask-image: none;
    mask-image: none;
  }

  .credentials-page .hero .container {
    display: block;
    width: 100%;
    padding: 28px var(--mobile-gutter) 48px;
  }

  .credentials-page .hero .container > div:first-child {
    width: 100%;
    padding: 26px 20px;
    border: 1px solid rgba(0, 45, 114, 0.1);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 12px 32px rgba(0, 45, 114, 0.08);
  }

  .credentials-page .hero-claim {
    font-size: clamp(34px, 9.5vw, 42px);
    line-height: 1.2;
    white-space: normal;
    text-wrap: balance;
  }

  .credentials-page .hero-desc {
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.75;
  }

  .credentials-page .hero-disclaimer {
    margin-top: 18px;
    font-size: 12px;
    line-height: 1.7;
    opacity: 1;
  }

  .credentials-page .hero-visual {
    display: none;
  }

  /* 首页首屏采用「影像先行、信息后置」的移动叙事，避免正文压在产品图上。 */
  .home-page .hero {
    display: block;
    min-height: 0;
    margin-top: -112px;
    padding: 112px 0 0;
    background: #f2f5f9;
  }

  .home-page .hero-bg {
    position: relative;
    inset: auto;
    width: calc(100% - 24px);
    height: clamp(220px, 58vw, 280px);
    aspect-ratio: auto;
    margin: 12px auto 0;
    border-radius: 20px;
    object-fit: cover;
    object-position: center;
    box-shadow: 0 12px 32px rgba(0, 45, 114, 0.1);
    -webkit-mask-image: none;
    mask-image: none;
  }

  .home-page .hero .container {
    display: block;
    width: 100%;
    padding: 28px var(--mobile-gutter) 48px;
  }

  .home-page .hero .container > div:first-child {
    width: 100%;
    padding: 26px 20px;
    border: 1px solid rgba(0, 45, 114, 0.1);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 12px 32px rgba(0, 45, 114, 0.08);
  }

  .home-page .hero-claim {
    font-size: clamp(34px, 9.5vw, 42px);
    line-height: 1.2;
    text-wrap: balance;
  }

  .home-page .hero-desc {
    margin-top: 20px;
    color: #133068;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.75;
  }

  .home-page .hero-disclaimer {
    margin-top: 18px;
    color: #526a82;
    font-size: 12px;
    line-height: 1.7;
    opacity: 1;
  }

  .home-page .hero-cta {
    margin-top: 22px;
  }

  .home-page .hero-cta .btn,
  .home-page .hero-cta a {
    max-width: none;
    min-height: 48px;
  }

  .home-page .trust-strip {
    padding: 28px 0 32px;
  }

  .home-page .trust-strip .container {
    align-items: stretch;
    gap: 0;
  }

  .home-page .trust-strip .hero-badge-item {
    flex: 0 0 100%;
    width: 100%;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(19, 48, 104, 0.1);
  }

  .home-page .trust-strip .hero-badge-item:nth-of-type(5) {
    border-bottom: 0;
  }

  .home-page .trust-divider {
    display: none;
  }

  .home-page .trust-strip-disclaimer {
    margin-top: 18px;
  }
}

@media screen and (max-width: 380px) {
  .home-page .hero {
    margin-top: -108px;
    padding-top: 108px;
  }

  .home-page .hero .container > div:first-child {
    padding: 24px 18px;
  }
}