/* =========================
   谱林鸟官网 V1 首页样式
   设计方向：现代东方 / 温暖治愈 / 低饱和 / 简约但不简单
========================= */

/* 基础变量 */
:root {
  --color-bg: #f7f2e9;
  --color-bg-soft: #f2eee5;
  --color-bg-card: rgba(255, 252, 246, 0.78);

  --color-primary: #8fa9a4;
  --color-primary-dark: #627f7b;
  --color-primary-light: #dbe7e3;

  --color-ink: #2f3437;
  --color-text: #596164;
  --color-muted: #8c9495;

  --color-pink: #e8c3c3;
  --color-apricot: #e5ccb3;
  --color-blue: #aeb9cc;
  --color-line: rgba(92, 106, 108, 0.16);

  --shadow-soft: 0 24px 70px rgba(72, 85, 82, 0.12);
  --shadow-card: 0 16px 42px rgba(72, 85, 82, 0.09);

  --radius-large: 32px;
  --radius-medium: 22px;
  --radius-small: 14px;

  --max-width: 1160px;
}

/* 全局重置 */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "PingFang SC",
    "Microsoft YaHei",
    "Noto Sans CJK SC",
    Arial,
    sans-serif;
  color: var(--color-ink);
  background:
    radial-gradient(circle at top left, rgba(159, 181, 177, 0.22), transparent 34%),
    radial-gradient(circle at 80% 8%, rgba(232, 195, 195, 0.18), transparent 28%),
    var(--color-bg);
  line-height: 1.8;
}

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

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

p {
  margin: 0;
}

.container {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.narrow {
  max-width: 820px;
}

.section {
  padding: 96px 0;
}

.section-kicker,
.eyebrow {
  margin-bottom: 14px;
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-heading h2,
.intro-section h2,
.split-content h2,
.lab-content h2,
.final-cta h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.22;
  letter-spacing: -0.04em;
}

.section-heading p,
.split-content p,
.lab-content p,
.final-cta p {
  color: var(--color-text);
}

.large-text {
  color: var(--color-text);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

/* =========================
   顶部导航
========================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: rgba(247, 242, 233, 0.78);
  backdrop-filter: blur(18px);
  transition: all 0.25s ease;
}

.site-header.scrolled {
  border-color: var(--color-line);
  background: rgba(247, 242, 233, 0.92);
  box-shadow: 0 12px 30px rgba(72, 85, 82, 0.06);
}

.nav-wrapper {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(98, 127, 123, 0.3);
  border-radius: 50%;
  background: linear-gradient(135deg, #f2eee5, #dbe7e3);
  color: var(--color-primary-dark);
  font-weight: 800;
}

.brand-logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.brand-text small {
  color: var(--color-muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
  color: var(--color-text);
  font-size: 0.92rem;
}

.main-nav a {
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 1px;
  width: 0;
  height: 1px;
  background: var(--color-primary-dark);
  transition: width 0.25s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 18px;
  border: 1px solid rgba(98, 127, 123, 0.26);
  border-radius: 999px;
  color: var(--color-primary-dark);
  font-size: 0.9rem;
  background: rgba(255, 252, 246, 0.55);
  transition: all 0.25s ease;
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.mobile-menu-button {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  background: rgba(255, 252, 246, 0.7);
  cursor: pointer;
}

.mobile-menu-button span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 5px auto;
  background: var(--color-ink);
}

/* =========================
   中英文切换按钮
========================= */

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 38px;
  padding: 0 13px;
  border: 1px solid rgba(98, 127, 123, 0.28);
  border-radius: 999px;
  background: rgba(255, 252, 246, 0.72);
  color: var(--color-primary-dark);
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
}

.lang-toggle:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.lang-divider {
  opacity: 0.5;
}

body[data-lang="zh"] .lang-zh,
body[data-lang="en"] .lang-en {
  font-weight: 900;
}

body[data-lang="zh"] .lang-en,
body[data-lang="en"] .lang-zh {
  opacity: 0.5;
}

/* =========================
   按钮
========================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: var(--color-primary-dark);
  box-shadow: 0 12px 30px rgba(98, 127, 123, 0.25);
}

.btn-secondary {
  color: var(--color-primary-dark);
  background: rgba(255, 252, 246, 0.78);
  border: 1px solid rgba(98, 127, 123, 0.24);
}

.btn-ghost {
  color: var(--color-primary-dark);
  border: 1px solid rgba(98, 127, 123, 0.28);
  background: transparent;
}

.text-link {
  display: inline-flex;
  margin-top: 28px;
  color: var(--color-primary-dark);
  font-weight: 800;
  border-bottom: 1px solid rgba(98, 127, 123, 0.35);
}

/* =========================
   首屏
========================= */

.hero-section {
  padding: 92px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 64px;
  align-items: center;
}

.hero-content h1 {
  margin: 0 0 24px;
  max-width: 720px;
  font-size: clamp(2.8rem, 6.4vw, 5.9rem);
  line-height: 1.06;
  letter-spacing: -0.07em;
}

.hero-description {
  max-width: 640px;
  color: var(--color-text);
  font-size: clamp(1.05rem, 2vw, 1.22rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 520px;
  margin-top: 34px;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.hero-note span {
  width: 10px;
  height: 10px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--color-pink);
  flex-shrink: 0;
}

.hero-visual {
  position: relative;
  min-height: 560px;
  display: grid;
  place-items: center;
}

.cover-card {
  width: min(82%, 390px);
  aspect-ratio: 0.72;
  padding: 38px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(255, 252, 246, 0.92), rgba(219, 231, 227, 0.68)),
    radial-gradient(circle at 50% 25%, rgba(232, 195, 195, 0.2), transparent 40%);
  box-shadow: var(--shadow-soft);
}

.cover-symbol {
  width: 150px;
  height: 92px;
  margin: 20px auto 72px;
  border: 2px solid rgba(98, 127, 123, 0.5);
  border-bottom: none;
  border-radius: 150px 150px 0 0;
  position: relative;
}

.cover-symbol::before,
.cover-symbol::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.cover-symbol::before {
  width: 64px;
  height: 64px;
  left: 42px;
  top: -32px;
  border: 1px solid rgba(232, 195, 195, 0.76);
}

.cover-symbol::after {
  width: 180px;
  height: 36px;
  left: -16px;
  bottom: -48px;
  border-top: 1px solid rgba(98, 127, 123, 0.22);
}

.cover-line {
  height: 12px;
  margin-bottom: 16px;
  border-radius: 999px;
  background: rgba(98, 127, 123, 0.14);
}

.cover-line.short {
  width: 58%;
}

.cover-line.light {
  width: 74%;
  background: rgba(232, 195, 195, 0.22);
}

.floating-card {
  position: absolute;
  width: 190px;
  padding: 18px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: 22px;
  background: rgba(255, 252, 246, 0.82);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
}

.floating-card strong {
  display: block;
  margin-bottom: 5px;
}

.floating-card span {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.card-one {
  top: 88px;
  left: 0;
}

.card-two {
  right: 0;
  bottom: 86px;
}

/* =========================
   介绍区
========================= */

.intro-section {
  text-align: center;
}

.intro-section h2 {
  margin-bottom: 22px;
}

/* =========================
   价值区
========================= */

.value-section {
  background: rgba(255, 252, 246, 0.42);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.value-card,
.product-card,
.totem-card {
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.icon-circle {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 800;
}

.value-card h3,
.product-card h3,
.totem-card h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.value-card p,
.product-card p,
.totem-card p {
  color: var(--color-text);
}

/* =========================
   产品体系
========================= */

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 50px;
  align-items: center;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.product-card span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

/* =========================
   成长实验
========================= */

.lab-section {
  padding-top: 50px;
}

.lab-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 50px;
  align-items: center;
  padding: 54px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(174, 185, 204, 0.18), transparent 32%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.88), rgba(219, 231, 227, 0.46));
  box-shadow: var(--shadow-soft);
}

.lab-content p + p {
  margin-top: 14px;
}

.lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.lab-steps {
  display: grid;
  gap: 16px;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.step-item span {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 800;
}

/* =========================
   图腾设计
========================= */

.totem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.totem-shape {
  width: 120px;
  height: 120px;
  margin: 0 auto 26px;
  position: relative;
}

.bridge-shape {
  border: 2px solid rgba(98, 127, 123, 0.5);
  border-bottom: none;
  border-radius: 120px 120px 0 0;
}

.bridge-shape::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: -22px;
  height: 22px;
  border-top: 1px solid rgba(98, 127, 123, 0.3);
  border-radius: 50%;
}

.tree-shape::before {
  content: "";
  position: absolute;
  left: 58px;
  top: 34px;
  width: 2px;
  height: 72px;
  background: rgba(98, 127, 123, 0.55);
}

.tree-shape::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 8px;
  width: 76px;
  height: 76px;
  border: 2px solid rgba(98, 127, 123, 0.46);
  border-radius: 50% 50% 46% 46%;
}

.star-shape {
  border: 1.5px solid rgba(98, 127, 123, 0.46);
  border-radius: 50%;
}

.star-shape::before,
.star-shape::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.star-shape::before {
  inset: 26px;
  border: 1px solid rgba(232, 195, 195, 0.8);
}

.star-shape::after {
  left: 54px;
  top: 54px;
  width: 12px;
  height: 12px;
  background: var(--color-primary-dark);
}

.center-action {
  text-align: center;
}

/* =========================
   最终行动区
========================= */

.final-cta-section {
  padding-top: 70px;
}

.final-cta {
  max-width: 840px;
  padding: 58px 34px;
  text-align: center;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background: rgba(255, 252, 246, 0.76);
  box-shadow: var(--shadow-soft);
}

.final-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

/* =========================
   页脚
========================= */

.site-footer {
  padding: 74px 0 28px;
  background: rgba(231, 226, 216, 0.68);
  border-top: 1px solid var(--color-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr 0.85fr 1fr 1.2fr;
  gap: 34px;
}

.footer-logo {
  margin-bottom: 18px;
}

.footer-brand p,
.footer-info p,
.footer-links a {
  color: var(--color-text);
  font-size: 0.94rem;
}

.footer-links,
.footer-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links h4,
.footer-info h4 {
  margin: 0 0 10px;
}

.footer-links a:hover {
  color: var(--color-primary-dark);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 50px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.86rem;
}

/* =========================
   页脚社交媒体二维码
========================= */

.footer-social {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 320px;
}

.footer-social h4 {
  margin: 0 0 4px;
}

.footer-social p {
  margin: 0;
  color: var(--color-text);
  font-size: 0.92rem;
  line-height: 1.7;
}

.social-qr-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}

.qr-card {
  border: 1px solid rgba(92, 106, 108, 0.12);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.72);
  padding: 10px 8px 8px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
}

.qr-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(32, 49, 54, 0.08);
  border-color: rgba(92, 106, 108, 0.24);
}

.qr-card img {
  display: block;
  width: 78px;
  height: 78px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 10px;
  background: #fff;
}

.qr-card span {
  display: block;
  margin-top: 7px;
  color: var(--color-text);
  font-size: 0.76rem;
  line-height: 1.2;
}

.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
}

.qr-modal.is-open {
  display: block;
}

.qr-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 28, 30, 0.55);
  backdrop-filter: blur(4px);
}

.qr-modal-dialog {
  position: relative;
  width: min(92vw, 420px);
  margin: 8vh auto 0;
  background: #fdfaf4;
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(16, 30, 34, 0.18);
  padding: 28px 24px 22px;
  z-index: 2;
}

.qr-modal-close {
  position: absolute;
  right: 14px;
  top: 12px;
  border: none;
  background: transparent;
  font-size: 1.8rem;
  line-height: 1;
  color: #415257;
  cursor: pointer;
}

.qr-modal-body {
  text-align: center;
}

.qr-modal-body img {
  display: block;
  width: min(72vw, 280px);
  height: min(72vw, 280px);
  margin: 10px auto 18px;
  object-fit: contain;
  background: #fff;
  border-radius: 18px;
  padding: 10px;
  box-shadow: inset 0 0 0 1px rgba(92, 106, 108, 0.08);
}

.qr-modal-body h4 {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 1.1rem;
}

.qr-modal-body p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* =========================
   响应式适配
========================= */

@media (max-width: 1024px) {
  .nav-cta {
    display: none;
  }

  .hero-grid,
  .split-layout,
  .lab-panel {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 460px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .section {
    padding: 72px 0;
  }

  .mobile-menu-button {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border: 1px solid var(--color-line);
    border-radius: 22px;
    background: rgba(255, 252, 246, 0.96);
    box-shadow: var(--shadow-card);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 12px 10px;
    border-bottom: 1px solid rgba(92, 106, 108, 0.08);
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  .hero-section {
    padding-top: 64px;
  }

  .hero-content h1 {
    font-size: clamp(2.55rem, 13vw, 4rem);
  }

  .hero-actions,
  .lab-actions,
  .final-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .value-grid,
  .product-grid,
  .totem-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 430px;
  }

  .floating-card {
    width: 170px;
  }

  .card-one {
    left: -4px;
    top: 42px;
  }

  .card-two {
    right: -4px;
    bottom: 48px;
  }

  .lab-panel {
    padding: 34px 22px;
  }

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

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .social-qr-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .qr-card img {
    width: 84px;
    height: 84px;
  }

  .qr-modal-dialog {
    width: min(92vw, 360px);
    margin-top: 10vh;
    padding: 24px 18px 20px;
    border-radius: 20px;
  }

  .qr-modal-body img {
    width: min(78vw, 260px);
    height: min(78vw, 260px);
  }
}

@media (max-width: 520px) {
  .nav-wrapper {
    min-height: 68px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-text strong {
    font-size: 0.96rem;
  }

  .main-nav {
    top: 68px;
  }

  .cover-card {
    width: 88%;
    padding: 28px;
    border-radius: 28px;
  }

  .cover-symbol {
    width: 124px;
    height: 76px;
  }

  .floating-card {
    position: relative;
    inset: auto;
    width: 100%;
    margin-top: 14px;
  }

  .hero-visual {
    display: block;
    min-height: auto;
  }

  .section-heading {
    margin-bottom: 34px;
  }

  .value-card,
  .product-card,
  .totem-card {
    padding: 24px;
  }

  .final-cta {
    padding: 42px 22px;
  }

  .social-qr-grid {
    grid-template-columns: repeat(2, 112px);
    gap: 12px;
    justify-content: start;
  }

  .qr-card {
    width: 112px;
    padding: 10px;
  }

  .qr-card img {
    width: 92px;
    height: 92px;
  }

  .qr-card span {
    font-size: 0.74rem;
  }

}

/* =========================
   英文版排版优化
========================= */

body[data-lang="en"] {
  font-family:
    "Inter",
    "Helvetica Neue",
    "Arial",
    "Segoe UI",
    sans-serif;
}

/* 顶部导航 */
body[data-lang="en"] .main-nav {
  font-size: 0.88rem;
  gap: 16px;
}

body[data-lang="en"] .nav-cta,
body[data-lang="en"] .lang-toggle {
  font-size: 0.82rem;
}

/* 品牌字标 */
body[data-lang="en"] .brand-text strong {
  font-size: 0.98rem;
  letter-spacing: 0.04em;
}

body[data-lang="en"] .brand-text small {
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

/* 首屏 */
body[data-lang="en"] .hero-content h1 {
  font-size: clamp(2.3rem, 5vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: -0.05em;
  max-width: 12ch;
}

body[data-lang="en"] .hero-description {
  font-size: 1rem;
  line-height: 1.75;
  max-width: 600px;
}

body[data-lang="en"] .hero-note p {
  font-size: 0.88rem;
  line-height: 1.65;
}

/* 首屏按钮 */
body[data-lang="en"] .hero-actions .btn {
  font-size: 0.9rem;
  padding: 0 20px;
}

/* 通用标题 */
body[data-lang="en"] .section-heading h2,
body[data-lang="en"] .intro-section h2,
body[data-lang="en"] .split-content h2,
body[data-lang="en"] .lab-content h2,
body[data-lang="en"] .final-cta h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  line-height: 1.28;
  letter-spacing: -0.03em;
}

/* 通用正文 */
body[data-lang="en"] .section-heading p,
body[data-lang="en"] .split-content p,
body[data-lang="en"] .lab-content p,
body[data-lang="en"] .final-cta p,
body[data-lang="en"] .large-text,
body[data-lang="en"] .value-card p,
body[data-lang="en"] .product-card p,
body[data-lang="en"] .totem-card p,
body[data-lang="en"] .footer-brand p,
body[data-lang="en"] .footer-info p,
body[data-lang="en"] .footer-social p {
  font-size: 0.96rem;
  line-height: 1.8;
}

/* 小标题与卡片标题 */
body[data-lang="en"] .value-card h3,
body[data-lang="en"] .product-card h3,
body[data-lang="en"] .totem-card h3 {
  font-size: 1.12rem;
  line-height: 1.4;
}

/* 英文状态下，卡片内边距略收紧 */
body[data-lang="en"] .value-card,
body[data-lang="en"] .product-card,
body[data-lang="en"] .totem-card {
  padding: 26px;
}

/* 图腾模块标题更长，限制宽度 */
body[data-lang="en"] .totem-card h3 {
  max-width: 18ch;
}

/* 页脚 */
body[data-lang="en"] .footer-links a,
body[data-lang="en"] .footer-info p,
body[data-lang="en"] .footer-social p {
  font-size: 0.88rem;
}

body[data-lang="en"] .footer-bottom {
  font-size: 0.8rem;
}

/* 社交二维码标题 */
body[data-lang="en"] .qr-card span {
  font-size: 0.72rem;
  line-height: 1.4;
}

/* 手机端英文适配 */
@media (max-width: 820px) {
  body[data-lang="en"] .hero-content h1 {
    font-size: clamp(2.1rem, 10vw, 3.2rem);
    max-width: none;
  }

  body[data-lang="en"] .hero-description {
    font-size: 0.96rem;
  }

  body[data-lang="en"] .section-heading h2,
  body[data-lang="en"] .intro-section h2,
  body[data-lang="en"] .split-content h2,
  body[data-lang="en"] .lab-content h2,
  body[data-lang="en"] .final-cta h2 {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
  }

  body[data-lang="en"] .main-nav a {
    font-size: 0.92rem;
  }
}

/* =========================
   二级页面通用结构
========================= */

.page-hero {
  padding: 96px 0 72px;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: 56px;
  align-items: center;
}

.page-hero-content h1 {
  margin: 0 0 24px;
  font-size: clamp(2.8rem, 5.8vw, 5.2rem);
  line-height: 1.08;
  letter-spacing: -0.06em;
}

.page-hero-description {
  max-width: 720px;
  color: var(--color-text);
  font-size: clamp(1.05rem, 2vw, 1.24rem);
}

.page-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.page-hero-card {
  display: flex;
  justify-content: center;
}

.lab-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(232, 195, 195, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.lab-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lab-meta-card h3 {
  margin: 10px 0 22px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.lab-meta-card ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lab-meta-card li {
  padding: 12px 14px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 14px;
  background: rgba(255, 252, 246, 0.62);
  color: var(--color-text);
}

.soft-section {
  background: rgba(255, 252, 246, 0.42);
}

.info-grid {
  display: grid;
  gap: 20px;
}

.three-columns {
  grid-template-columns: repeat(3, 1fr);
}

.four-columns {
  grid-template-columns: repeat(4, 1fr);
}

.info-card,
.timeline-card,
.content-panel {
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.info-card span,
.timeline-card span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.info-card h3,
.timeline-card h3,
.content-panel h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  line-height: 1.35;
}

.info-card p,
.timeline-card p,
.content-panel p,
.check-item p {
  color: var(--color-text);
}

.check-list {
  display: grid;
  gap: 14px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.check-item span {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 900;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.two-panel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* 英文二级页面适配 */
body[data-lang="en"] .page-hero-content h1 {
  font-size: clamp(2.2rem, 4.8vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.05em;
}

body[data-lang="en"] .page-hero-description {
  font-size: 1rem;
  line-height: 1.75;
}

body[data-lang="en"] .info-card h3,
body[data-lang="en"] .timeline-card h3,
body[data-lang="en"] .content-panel h2 {
  font-size: 1.12rem;
  line-height: 1.38;
}

body[data-lang="en"] .info-card,
body[data-lang="en"] .timeline-card,
body[data-lang="en"] .content-panel {
  padding: 26px;
}

/* 二级页面响应式 */
@media (max-width: 1024px) {
  .page-hero-grid,
  .two-panel-grid {
    grid-template-columns: 1fr;
  }

  .four-columns {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .page-hero {
    padding: 72px 0 52px;
  }

  .page-hero-content h1 {
    font-size: clamp(2.3rem, 11vw, 3.6rem);
  }

  .page-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .three-columns,
  .four-columns,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .lab-meta-card {
    padding: 26px;
  }
}

/* =========================
   联系我们 / 隐私说明页
========================= */

.contact-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(174, 185, 204, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.contact-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contact-meta-card h3 {
  margin: 10px 0 24px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.contact-meta-list {
  display: grid;
  gap: 14px;
}

.contact-meta-list div {
  padding: 14px 16px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.68);
}

.contact-meta-list span {
  display: block;
  margin-bottom: 4px;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.contact-meta-list strong {
  color: var(--color-ink);
  font-size: 0.96rem;
}

.contact-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.contact-card {
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.contact-card span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.contact-card h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  line-height: 1.35;
}

.contact-card p {
  color: var(--color-text);
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.privacy-card {
  padding: 32px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.privacy-card h3 {
  margin: 0 0 18px;
  font-size: 1.25rem;
}

.privacy-card ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-text);
}

.notice-panel {
  max-width: 900px;
  margin: 0 auto;
  padding: 44px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top left, rgba(232, 195, 195, 0.16), transparent 34%),
    rgba(255, 252, 246, 0.78);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.notice-panel h2 {
  margin: 0 0 18px;
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  line-height: 1.25;
  letter-spacing: -0.04em;
}

.notice-panel p {
  color: var(--color-text);
}

/* 英文联系页适配 */
body[data-lang="en"] .contact-meta-card h3,
body[data-lang="en"] .notice-panel h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

body[data-lang="en"] .contact-card h3,
body[data-lang="en"] .privacy-card h3 {
  font-size: 1.12rem;
}

body[data-lang="en"] .contact-card,
body[data-lang="en"] .privacy-card,
body[data-lang="en"] .contact-meta-card {
  padding: 26px;
}

/* 联系页响应式 */
@media (max-width: 1024px) {
  .contact-card-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 820px) {
  .notice-panel {
    padding: 32px 22px;
  }
}

/* =========================
   品牌介绍页 About
========================= */

.about-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(232, 195, 195, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.about-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.about-meta-card h3 {
  margin: 10px 0 24px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.about-meta-list {
  display: grid;
  gap: 14px;
}

.about-meta-list div {
  padding: 14px 16px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.68);
}

.about-meta-list span {
  display: block;
  margin-bottom: 4px;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.about-meta-list strong {
  color: var(--color-ink);
  font-size: 0.96rem;
}

.quote-panel {
  padding: 44px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top left, rgba(232, 195, 195, 0.18), transparent 34%),
    rgba(255, 252, 246, 0.76);
  box-shadow: var(--shadow-soft);
}

.quote-panel p {
  margin: 0;
  color: var(--color-primary-dark);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1.45;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.design-principle-list {
  display: grid;
  gap: 16px;
}

.principle-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.principle-item span {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.principle-item p {
  color: var(--color-text);
}

.founder-panel {
  background:
    radial-gradient(circle at top right, rgba(174, 185, 204, 0.16), transparent 36%),
    var(--color-bg-card);
}

/* 英文品牌介绍页适配 */
body[data-lang="en"] .about-meta-card h3,
body[data-lang="en"] .quote-panel p {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
}

body[data-lang="en"] .principle-item p,
body[data-lang="en"] .about-meta-list strong {
  font-size: 0.92rem;
}

/* 品牌介绍页响应式 */
@media (max-width: 820px) {
  .quote-panel {
    padding: 32px 22px;
  }
}

/* =========================
   产品体系页 Products
========================= */

.product-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(174, 185, 204, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.product-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.product-meta-card h3 {
  margin: 10px 0 24px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.product-meta-list {
  display: grid;
  gap: 14px;
}

.product-meta-list div {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.68);
}

.product-meta-list span {
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.product-meta-list strong {
  color: var(--color-ink);
  font-size: 0.96rem;
}

.product-system-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.product-system-card,
.module-card,
.version-card {
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.product-system-card span,
.module-card span,
.version-card span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.product-system-card h3,
.module-card h3,
.version-card h3 {
  margin: 0 0 12px;
  font-size: 1.22rem;
  line-height: 1.35;
}

.product-system-card p,
.module-card p,
.version-card p,
.feature-item p,
.tag-system-item p {
  color: var(--color-text);
}

.feature-list {
  display: grid;
  gap: 16px;
}

.feature-item {
  padding: 20px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.feature-item span {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.feature-item h3 {
  margin: 0 0 8px;
  font-size: 1.12rem;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.tag-system-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.tag-system-item {
  padding: 22px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.tag-system-item span {
  display: block;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
  font-weight: 900;
}

.version-ladder {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

/* 英文产品页适配 */
body[data-lang="en"] .product-meta-card h3 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

body[data-lang="en"] .product-system-card h3,
body[data-lang="en"] .module-card h3,
body[data-lang="en"] .version-card h3,
body[data-lang="en"] .feature-item h3 {
  font-size: 1.08rem;
}

body[data-lang="en"] .product-system-card,
body[data-lang="en"] .module-card,
body[data-lang="en"] .version-card,
body[data-lang="en"] .product-meta-card {
  padding: 26px;
}

/* 产品页响应式 */
@media (max-width: 1180px) {
  .product-system-grid,
  .module-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .version-ladder {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .product-system-grid,
  .module-grid,
  .tag-system-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================
   设计语言页 Design
========================= */

.design-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(232, 195, 195, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.design-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.design-meta-card h3 {
  margin: 10px 0 24px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.design-meta-list {
  display: grid;
  gap: 14px;
}

.design-meta-list div {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.68);
}

.design-meta-list span {
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.design-meta-list strong {
  color: var(--color-ink);
  font-size: 0.96rem;
}

.design-path-grid,
.mother-totem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.design-path-card,
.mother-totem-card,
.visual-principle-card,
.boundary-card {
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
}

.design-path-card span,
.visual-principle-card span,
.application-item span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.design-path-card h3,
.mother-totem-card h3,
.visual-principle-card h3,
.boundary-card h3,
.application-item h3 {
  margin: 0 0 12px;
  font-size: 1.22rem;
  line-height: 1.35;
}

.design-path-card p,
.mother-totem-card p,
.visual-principle-card p,
.boundary-card p,
.application-item p {
  color: var(--color-text);
}

.mother-totem-card {
  text-align: center;
}

.mother-totem-card .section-kicker {
  margin-top: 8px;
}

.visual-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.application-list {
  display: grid;
  gap: 16px;
}

.application-item {
  padding: 20px;
  border: 1px solid rgba(98, 127, 123, 0.15);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.72);
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.design-spirit-panel {
  max-width: 980px;
  margin: 0 auto;
  padding: 58px 36px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top left, rgba(232, 195, 195, 0.16), transparent 34%),
    radial-gradient(circle at bottom right, rgba(174, 185, 204, 0.16), transparent 34%),
    rgba(255, 252, 246, 0.78);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.design-spirit-panel h2 {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 1.22;
  letter-spacing: -0.05em;
}

.design-spirit-panel p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--color-text);
}

/* 英文设计页适配 */
body[data-lang="en"] .design-meta-card h3,
body[data-lang="en"] .design-spirit-panel h2 {
  font-size: clamp(1.6rem, 3.4vw, 3rem);
}

body[data-lang="en"] .design-path-card h3,
body[data-lang="en"] .mother-totem-card h3,
body[data-lang="en"] .visual-principle-card h3,
body[data-lang="en"] .boundary-card h3,
body[data-lang="en"] .application-item h3 {
  font-size: 1.08rem;
}

body[data-lang="en"] .design-path-card,
body[data-lang="en"] .mother-totem-card,
body[data-lang="en"] .visual-principle-card,
body[data-lang="en"] .boundary-card,
body[data-lang="en"] .design-meta-card {
  padding: 26px;
}

/* 设计页响应式 */
@media (max-width: 1024px) {
  .design-path-grid,
  .mother-totem-grid,
  .visual-principle-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 820px) {
  .design-spirit-panel {
    padding: 42px 22px;
  }
}

/* =========================
   常见问题页 FAQ
========================= */

.faq-meta-card {
  width: 100%;
  padding: 34px;
  border: 1px solid rgba(98, 127, 123, 0.18);
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at top right, rgba(174, 185, 204, 0.18), transparent 36%),
    linear-gradient(135deg, rgba(255, 252, 246, 0.9), rgba(219, 231, 227, 0.58));
  box-shadow: var(--shadow-soft);
}

.faq-meta-card > p {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.faq-meta-card h3 {
  margin: 10px 0 24px;
  font-size: 1.8rem;
  line-height: 1.25;
}

.faq-meta-list {
  display: grid;
  gap: 14px;
}

.faq-meta-list div {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(98, 127, 123, 0.14);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.68);
}

.faq-meta-list span {
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.faq-meta-list strong {
  color: var(--color-ink);
  font-size: 0.96rem;
}

.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  border: 1px solid rgba(98, 127, 123, 0.16);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.78);
  box-shadow: 0 10px 30px rgba(72, 85, 82, 0.06);
  overflow: hidden;
}

.faq-item summary {
  position: relative;
  padding: 20px 56px 20px 22px;
  color: var(--color-ink);
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 22px;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 900;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item p {
  padding: 0 22px 22px;
  color: var(--color-text);
  line-height: 1.85;
}

/* 英文 FAQ 适配 */
body[data-lang="en"] .faq-meta-card h3 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

body[data-lang="en"] .faq-item summary {
  font-size: 0.98rem;
  line-height: 1.55;
}

body[data-lang="en"] .faq-item p {
  font-size: 0.94rem;
  line-height: 1.8;
}

body[data-lang="en"] .faq-meta-card {
  padding: 26px;
}

/* FAQ 响应式 */
@media (max-width: 820px) {
  .faq-item summary {
    padding: 18px 52px 18px 18px;
  }

  .faq-item p {
    padding: 0 18px 20px;
  }
}

/* =========================
   页面锚点跳转偏移
========================= */

#privacy,
#cooperation,
#join,
#signup,
#process,
#system,
#totems,
#brand,
#plan,
#boundary,
#contact {
  scroll-margin-top: 96px;
}