/* ============================================================
   GEO 优化系统 · 全站公共样式
   首页 / 新闻列表 / 内容详情 共用
   ============================================================ */
/* ============================================================
   1. Design Tokens
   ============================================================ */
:root {
  /* Brand */
  --brand-700: #3730A3;
  --brand-600: #4F46E5;
  --brand-500: #6366F1;
  --brand-100: #E0E2FF;
  --brand-50:  #F0F1FF;

  /* Accent (AI semantics) */
  --teal-700: #0F766E;
  --teal-600: #0D9488;
  --teal-50:  #ECFDF9;

  /* Neutrals */
  --ink-900: #0B1220;
  --ink-700: #28304A;
  --ink-500: #5B6479;
  --ink-400: #656E82;
  --line:     #E7EAF3;
  --canvas:   #F6F7FB;
  --white:    #FFFFFF;

  /* Radius / Shadow */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-full: 999px;
  --shadow-sm: 0 1px 2px rgba(11, 18, 32, .06);
  --shadow-md: 0 10px 28px -10px rgba(11, 18, 32, .14), 0 2px 6px rgba(11, 18, 32, .04);
  --shadow-lg: 0 30px 70px -30px rgba(30, 27, 90, .32);

  /* Motion */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .24s;

  /* Layout */
  --maxw: 1160px;
  --gutter: clamp(20px, 5vw, 32px);
  --section-y: clamp(56px, 8vw, 112px);

  /* Type scale */
  --fs-hero: clamp(2rem, 5.4vw, 3.5rem);
  --fs-h2:   clamp(1.5rem, 3.2vw, 2.25rem);
  --fs-h3:   1.0625rem;
  --fs-body: 1rem;
  --fs-sm:   .875rem;
  --fs-xs:   .75rem;
}

/* ============================================================
   2. Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink-700);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--brand-600);
  color: #fff;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 16px; }

/* ============================================================
   3. Buttons
   ============================================================ */
.btn {
  --btn-bg: var(--brand-600);
  --btn-fg: #fff;
  /* 同时兼容 <a> 与 <button> 元素 */
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
  /* 降级：不支持 flex 的内核也能水平垂直居中 */
  display: inline-block;
  text-align: center;
  line-height: 1.5;
  min-height: 48px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--r-full);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
  /* 增强：现代浏览器用 flex 精确居中 */
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn:hover { transform: translateY(-1px) scale(1.02); box-shadow: 0 12px 24px -10px rgba(79, 70, 229, .55); }
.btn:active { transform: scale(.98); box-shadow: none; }

/* 上下微高光代替斜向渐变：全宽时明暗分布依然均匀 */
.btn--primary {
  background-color: var(--brand-600);
  background-image: linear-gradient(180deg,
    rgba(255, 255, 255, .16),
    rgba(255, 255, 255, 0) 45%,
    rgba(30, 27, 90, .16));
}

.btn--ghost {
  background: var(--white);
  color: var(--ink-900);
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: var(--brand-100); box-shadow: 0 12px 24px -14px rgba(11, 18, 32, .3); }

.btn--light {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border-color: rgba(255, 255, 255, .32);
  backdrop-filter: blur(6px);
}
.btn--light:hover { background: rgba(255, 255, 255, .2); box-shadow: 0 12px 26px -12px rgba(0, 0, 0, .5); }

.btn__arrow {
  width: 16px; height: 16px;
  flex: none;
  display: inline-block;
  vertical-align: -3px; /* 降级内联模式下与文字对齐 */
  margin-left: 8px;
  transition: transform var(--dur) var(--ease);
}
.btn:hover .btn__arrow { transform: translateX(3px); }

/* 触屏设备：禁用悬停位移，避免点击后残留悬停态 */
@media (hover: none) {
  .btn:hover { transform: none; }
  .btn:hover .btn__arrow { transform: none; }
}

/* ============================================================
   4. Header / Nav
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(11, 18, 32, .5);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink-900); }
.brand__mark { flex: none;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  color: #fff;
  font-size: 15px;
  letter-spacing: -.02em;
  box-shadow: 0 6px 14px -6px rgba(79, 70, 229, .8);
}
.brand__text { display: flex; min-width: 0; flex-direction: column; line-height: 1.2; }
.brand__name { font-size: .9375rem; white-space: nowrap; }
.brand__sub { font-size: var(--fs-xs); font-weight: 500; color: var(--ink-400); letter-spacing: .04em; }

/* 品牌锁定组：图标在左、名称+副标题在右（适用于链接只包住标题的结构） */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-lockup .brand__name .brand {
  display: inline-block;
  border-radius: 6px;
  transition: color var(--dur) var(--ease);
}
.brand-lockup .brand__name .brand:hover { color: var(--brand-700); }
.brand-lockup .brand__name .brand:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}

.nav__list { display: none; align-items: center; gap: 4px; }

.nav__link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-500);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav__link:hover { color: var(--ink-900); background: var(--canvas); }

.header__cta { display: none; }

.nav-toggle {
  display: inline-grid;
  place-items: center;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--white);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--brand-100); }

.nav-toggle__bars { position: relative; width: 18px; height: 12px; }
.nav-toggle__bars span {
  position: absolute;
  left: 0;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--ink-900);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__bars span:nth-child(1) { top: 0; }
.nav-toggle__bars span:nth-child(2) { top: 5px; }
.nav-toggle__bars span:nth-child(3) { top: 10px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Mobile dropdown panel */
.mobile-nav {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--dur) var(--ease);
  border-top: 1px solid transparent;
}
.mobile-nav > div { overflow: hidden; }
.mobile-nav.is-open { grid-template-rows: 1fr; border-top-color: var(--line); }
.mobile-nav ul { padding: 8px 0 4px; }
.mobile-nav a {
  display: block;
  padding: 12px 4px;
  font-size: .9375rem;
  font-weight: 500;
  color: var(--ink-700);
  border-bottom: 1px solid var(--line);
}
.mobile-nav .btn { display: flex; width: 100%; margin: 16px 0 20px; }

/* ============================================================
   5. Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(40px, 7vw, 80px) clamp(56px, 8vw, 96px);
  background:
    radial-gradient(70% 60% at 12% 0%, rgba(99, 102, 241, .14), transparent 62%),
    radial-gradient(60% 55% at 92% 8%, rgba(13, 148, 136, .12), transparent 60%),
    linear-gradient(180deg, var(--white), var(--canvas));
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(11, 18, 32, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 18, 32, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(70% 55% at 50% 0%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 55% at 50% 0%, #000 10%, transparent 78%);
  pointer-events: none;
}
.hero > .container { position: relative; z-index: 1; }

.hero__grid { display: grid; gap: clamp(40px, 6vw, 56px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  border: 1px solid var(--brand-100);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .8);
  color: var(--brand-700);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .02em;
}
.eyebrow__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal-600);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, .16);
}

.hero__title {
  margin-top: 20px;
  font-size: var(--fs-hero);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink-900);
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(100deg, var(--brand-600), var(--teal-600) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__desc {
  margin-top: 20px;
  max-width: 34em;
  font-size: clamp(.9375rem, 1.6vw, 1.0625rem);
  color: var(--ink-500);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.hero__actions .btn { flex: 1 1 auto; min-width: 168px; }

.hero__note {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 24px;
  font-size: var(--fs-xs);
  color: var(--ink-400);
}
.hero__note span { display: inline-flex; align-items: center; gap: 6px; }
.hero__note svg { width: 14px; height: 14px; color: var(--teal-600); }

/* --- AI answer mockup --- */
.mock {
  position: relative;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, #131A2E, #0B1220 62%);
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  color: #E8EBF5;
  isolation: isolate;
}
.mock::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(150deg, rgba(99, 102, 241, .7), rgba(13, 148, 136, .45) 45%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.mock__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  font-size: var(--fs-xs);
  color: rgba(232, 235, 245, .62);
}
.mock__bar-left { display: inline-flex; align-items: center; gap: 8px; }
.mock__dots { display: inline-flex; gap: 4px; }
.mock__dots i { width: 7px; height: 7px; border-radius: 50%; background: rgba(255, 255, 255, .2); }
.mock__dots i:first-child { background: rgba(99, 102, 241, .9); }

.mock__badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: var(--r-full);
  background: rgba(13, 148, 136, .16);
  border: 1px solid rgba(13, 148, 136, .34);
  color: #5EEAD4;
  font-weight: 600;
  letter-spacing: .02em;
}

.mock__q {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.mock__avatar {
  flex: none;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, .1);
  color: rgba(232, 235, 245, .8);
  font-size: 11px;
}
.mock__q p {
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: rgba(232, 235, 245, .92);
}

.mock__a {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .07);
}
.mock__a-head {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: rgba(232, 235, 245, .6);
  letter-spacing: .04em;
}
.mock__a p {
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(232, 235, 245, .82);
}
.mock__a mark {
  background: rgba(94, 234, 212, .14);
  color: #7FF3DC;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 600;
}

.mock__sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.mock__sources span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  font-size: 11px;
  color: rgba(232, 235, 245, .72);
}
.mock__sources span:first-child { border-color: rgba(99, 102, 241, .5); color: #C7C4FF; background: rgba(99, 102, 241, .16); }

.mock__foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 11px;
  color: rgba(232, 235, 245, .64);
}
.mock__pulse {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #5EEAD4;
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.82); }
}

/* ============================================================
   6. Stats
   ============================================================ */
.stats { position: relative; z-index: 2; }
.stats__card {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.stats__item {
  background: var(--white);
  padding: 22px 18px;
  text-align: center;
}
.stats__num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink-900);
  line-height: 1.2;
}
.stats__num i { font-style: normal; color: var(--brand-600); }
.stats__label { display: block; margin-top: 4px; font-size: var(--fs-xs); color: var(--ink-400); letter-spacing: .02em; }

/* ============================================================
   7. Section shell
   ============================================================ */
.section { padding-block: var(--section-y); }
.section--canvas { background: var(--canvas); }
.section--tight { padding-block: clamp(40px, 6vw, 64px); }

.section__head { max-width: 660px; margin-inline: auto; text-align: center; }
.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--brand-600);
}
.section__eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  background: currentColor;
  opacity: .5;
}
.section__title {
  margin-top: 12px;
  font-size: var(--fs-h2);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--ink-900);
  text-wrap: balance;
}
.section__desc {
  margin-top: 12px;
  font-size: clamp(.9375rem, 1.5vw, 1rem);
  color: var(--ink-500);
  text-wrap: pretty;
}

/* ============================================================
   8. Process / Steps
   ============================================================ */
.steps {
  display: grid;
  gap: 20px;
  margin-top: clamp(36px, 5vw, 56px);
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--brand-100); }

.step__num {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  color: var(--brand-700);
  font-size: .9375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.step__title { font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); line-height: 1.5; }
.step__desc { margin-top: 6px; font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.65; }

/* ============================================================
   9. Service cards
   ============================================================ */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
  gap: 16px;
  margin-top: clamp(36px, 5vw, 56px);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-100);
  box-shadow: var(--shadow-md);
}
.card__icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--brand-50), #fff);
  border: 1px solid var(--brand-100);
  color: var(--brand-600);
  transition: transform var(--dur) var(--ease);
}
.card:hover .card__icon { transform: scale(1.06) rotate(-3deg); }
.card__icon svg { width: 21px; height: 21px; }
.card__title { font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.card__desc { font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.7; }

/* ============================================================
   10. Comparison
   ============================================================ */
.compare {
  display: grid;
  gap: 16px;
  margin-top: clamp(36px, 5vw, 56px);
  align-items: stretch;
}
.compare__col {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--white);
}
.compare__col--win {
  background: linear-gradient(170deg, #FFFFFF, var(--brand-50) 130%);
  border-color: var(--brand-100);
  box-shadow: var(--shadow-md);
  position: relative;
}
.compare__tag {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .04em;
  background: var(--canvas);
  color: var(--ink-400);
  border: 1px solid var(--line);
}
.compare__col--win .compare__tag {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}
.compare__head { margin-top: 14px; font-size: 1.25rem; font-weight: 700; color: var(--ink-900); letter-spacing: -.01em; }
.compare__col--win .compare__head { color: var(--brand-700); }
.compare__list { margin-top: 16px; display: grid; gap: 12px; }
.compare__list li {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--ink-500);
}
.compare__col--win .compare__list li { color: var(--ink-700); }
.compare__mark {
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border-radius: 50%;
  margin-top: 1px;
  flex: none;
}
.compare__mark--off { background: #F1F2F6; color: var(--ink-400); }
.compare__mark--on { background: rgba(13, 148, 136, .12); color: var(--teal-700); }
.compare__mark svg { width: 11px; height: 11px; }

/* ============================================================
   11. Advantages
   ============================================================ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 1px;
  margin-top: clamp(36px, 5vw, 56px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.adv {
  background: var(--white);
  padding: 26px 24px;
  transition: background-color var(--dur) var(--ease);
}
.adv:hover { background: #FAFAFF; }
.adv__top { display: flex; align-items: center; gap: 10px; }
.adv__idx {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--brand-600);
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
}
.adv__title { font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.adv__desc { margin-top: 8px; font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.7; }

/* ============================================================
   12. Cases
   ============================================================ */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: clamp(36px, 5vw, 56px);
}
.case {
  display: flex;
  flex-direction: column;
  padding: 26px;
  border-radius: var(--r-md);
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.case:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--brand-100); }
.case__industry {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: var(--teal-50);
  border: 1px solid rgba(13, 148, 136, .18);
  color: var(--teal-700);
  font-size: var(--fs-xs);
  font-weight: 600;
}
.case__title { margin-top: 14px; font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.case__desc { margin-top: 8px; font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.7; flex: 1; }
.case__metric {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.case__metric b {
  font-size: clamp(1.5rem, 3.6vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--brand-600);
  line-height: 1;
}
.case__metric span { font-size: var(--fs-xs); color: var(--ink-400); }

/* ============================================================
   13. FAQ
   ============================================================ */
.faq { max-width: 820px; margin: clamp(36px, 5vw, 56px) auto 0; display: grid; gap: 12px; }

.faq__item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 4px 20px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.faq__item[open] { border-color: var(--brand-100); box-shadow: var(--shadow-sm); }

.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--ink-900);
  cursor: pointer;
  list-style: none;
  line-height: 1.55;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q:hover { color: var(--brand-700); }

.faq__sign {
  flex: none;
  position: relative;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.faq__sign::before,
.faq__sign::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  background: var(--ink-500);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: opacity var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.faq__sign::before { width: 9px; height: 1.5px; }
.faq__sign::after { width: 1.5px; height: 9px; }
.faq__item[open] .faq__sign { background: var(--brand-600); border-color: var(--brand-600); transform: rotate(90deg); }
.faq__item[open] .faq__sign::after { opacity: 0; }
.faq__item[open] .faq__sign::before { background: #fff; }

.faq__a {
  padding: 0 0 18px;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink-500);
  max-width: 62ch;
}

/* ============================================================
   14. CTA band
   ============================================================ */
.cta {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  padding: clamp(32px, 6vw, 64px) clamp(24px, 5vw, 56px);
  background: linear-gradient(135deg, #1B1B4B, #0B1220 58%, #0E1A33);
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.cta::before,
.cta::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}
.cta::before { width: 320px; height: 320px; top: -140px; left: -80px; background: rgba(99, 102, 241, .5); }
.cta::after  { width: 280px; height: 280px; bottom: -160px; right: -60px; background: rgba(13, 148, 136, .38); }

.cta > * { position: relative; z-index: 1; }
.cta__title {
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.3;
  text-wrap: balance;
}
.cta__desc {
  margin: 14px auto 0;
  max-width: 46ch;
  font-size: var(--fs-sm);
  color: rgba(232, 235, 245, .72);
  line-height: 1.8;
}
.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.cta__actions .btn { flex: 1 1 auto; min-width: 164px; }

/* ============================================================
   15. Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--line);
  background: var(--white);
  padding-block: clamp(40px, 6vw, 56px) 28px;
}
.footer__grid { display: grid; gap: 32px; }
.footer__about { max-width: 34ch; }
.footer__about p { margin-top: 14px; font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.8; }
.footer__col h4 {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-400);
  margin-bottom: 14px;
}
.footer__col li + li { margin-top: 10px; }
.footer__col a {
  font-size: var(--fs-sm);
  color: var(--ink-500);
  transition: color var(--dur) var(--ease);
}
.footer__col a:hover { color: var(--brand-700); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  color: var(--ink-400);
}

/* ============================================================
   16. QR Modal
   ============================================================ */
body.is-locked { overflow: hidden; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: flex-start;   /* 配合卡片 margin:auto，内容超高时可从顶部滚动 */
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.modal[hidden] { display: none; }

.modal__overlay {
  position: fixed;           /* 固定遮罩，弹窗滚动时不会露出背景 */
  inset: 0;
  background: rgba(11, 18, 32, .58);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: overlay-in .2s var(--ease) both;
}
.modal.is-closing .modal__overlay { animation: overlay-out .16s var(--ease) both; }

.modal__card {
  position: relative;
  width: 100%;
  max-width: 340px;
  margin: auto;
  padding: 32px 24px 24px;
  border-radius: 22px;
  background: var(--white);
  box-shadow: 0 32px 80px -24px rgba(11, 18, 32, .45);
  text-align: center;
  animation: card-in .26s var(--ease) both;
}
.modal.is-closing .modal__card { animation: card-out .16s var(--ease) both; }

.modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--canvas);
  color: var(--ink-500);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.modal__close:hover { background: var(--line); color: var(--ink-900); transform: scale(1.06); }
.modal__close:active { transform: scale(.94); }
.modal__close svg { width: 15px; height: 15px; }

/* 二维码：白底 + 细边，避免深色二维码贴到卡片边缘 */
.qr {
  width: 168px;
  height: 168px;
  margin: 0 auto;
  padding: 6px;
  border-radius: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.qr img {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  object-fit: contain;
}
.qr__fallback {
  display: none;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: 12px;
  font-size: var(--fs-xs);
  color: var(--ink-400);
  line-height: 1.6;
}
.qr.is-error img { display: none; }
.qr.is-error .qr__fallback { display: grid; }

.modal__title {
  margin-top: 20px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink-900);
  line-height: 1.4;
}
.modal__desc {
  margin-top: 8px;
  font-size: var(--fs-sm);
  color: var(--ink-500);
  line-height: 1.7;
}
.modal__hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  padding: 6px 14px;
  border-radius: var(--r-full);
  background: var(--brand-50);
  color: var(--brand-700);
  font-size: var(--fs-xs);
  font-weight: 600;
}
.modal__hint svg { width: 12px; height: 12px; }

@keyframes overlay-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes overlay-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes card-in {
  from { opacity: 0; transform: translateY(12px) scale(.96); }
  to   { opacity: 1; transform: none; }
}
@keyframes card-out {
  from { opacity: 1; transform: none; }
  to   { opacity: 0; transform: translateY(8px) scale(.98); }
}

/* ============================================================
   17. Reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   18. Breakpoints
   ============================================================ */
@media (min-width: 560px) {
  .stats__card { grid-template-columns: repeat(4, 1fr); }
  .hero__actions .btn { flex: 0 0 auto; }
  .cta__actions .btn { flex: 0 0 auto; }
}

@media (min-width: 768px) {
  .stats { margin-top: -44px; }
  .stats__item { padding: 26px 20px; }
  .compare { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1.6fr 1fr 1fr; }
}

@media (min-width: 992px) {
  .header__inner { min-height: 76px; }
  .nav__list { display: flex; }
  .header__cta { display: inline-flex; }
  /* 7 项导航在窄桌面收紧，避免与 CTA 挤在一起 */
  .nav-toggle { display: none; }
  .mobile-nav { display: none; }

  .hero { padding-block: clamp(64px, 7vw, 104px) clamp(72px, 8vw, 112px); }
  .hero__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; gap: clamp(48px, 6vw, 80px); }
  .mock { padding: 24px; }

  .steps { grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .step { grid-template-columns: 1fr; gap: 14px; padding: 24px 22px; }

  .adv { padding: 30px 28px; }
}

@media (min-width: 1200px) {
  .adv-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .btn:hover, .card:hover, .step:hover, .case:hover { transform: none; }
}

/* ============================================================
   19. 子页面头部（页面标题 + 面包屑）
   ============================================================ */
.page-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(28px, 5vw, 44px) clamp(24px, 4vw, 36px);
  background:
    radial-gradient(58% 76% at 6% 0%, rgba(99, 102, 241, .12), transparent 62%),
    radial-gradient(50% 70% at 96% 0%, rgba(13, 148, 136, .1), transparent 60%),
    linear-gradient(180deg, var(--white), var(--canvas));
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--ink-400);
}
.breadcrumb a { color: var(--ink-500); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--brand-700); }
.breadcrumb__sep { color: #C7CCDA; }

.page-hero__title {
  margin-top: 14px;
  font-size: clamp(1.75rem, 4.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--ink-900);
}
.page-hero__desc {
  margin-top: 10px;
  max-width: 56ch;
  font-size: clamp(.9375rem, 1.6vw, 1rem);
  color: var(--ink-500);
}

/* 当前页导航高亮 */
.nav__link[aria-current="page"] { color: var(--brand-700); background: var(--brand-50); }
.mobile-nav a[aria-current="page"] { color: var(--brand-700); font-weight: 600; }

/* ============================================================
   20. 新闻列表
   ============================================================ */
.filters {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  padding-bottom: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.filters::-webkit-scrollbar { display: none; }

.chip {
  flex: none;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  background: var(--white);
  font-family: inherit;
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink-500);
  white-space: nowrap;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.chip:hover { border-color: var(--brand-100); color: var(--ink-900); }
.chip[aria-pressed="true"] {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}

.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.post {
  position: relative;   /* 供标题链接的点击热区覆盖整卡 */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.post:hover {
  transform: translateY(-4px);
  border-color: var(--brand-100);
  box-shadow: var(--shadow-md);
}

/* 封面用渐变 + 图形占位，不依赖外链图片 */
.post__cover {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  color: var(--brand-600);
  background: linear-gradient(135deg, #EAEBFF, #DCE6FF);
}
.post__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .5) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(70% 70% at 70% 30%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 70% at 70% 30%, #000, transparent 78%);
  pointer-events: none;
}
.post__cover svg {
  position: relative;
  z-index: 1;
  width: 46px;
  height: 46px;
  opacity: .9;
  transition: transform .4s var(--ease);
}
.post:hover .post__cover svg { transform: scale(1.08) rotate(-3deg); }

.post__cover--teal { color: var(--teal-700); background: linear-gradient(135deg, #E6F7F3, #DBF0FA); }
.post__cover--amber { color: #B45309; background: linear-gradient(135deg, #FDF1E0, #FBE7D4); }
.post__cover--slate { color: #3F4A63; background: linear-gradient(135deg, #EDF0F7, #E3E8F2); }

.post__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 20px 22px 22px;
}

.post__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--ink-400);
}
.post__cat { color: var(--brand-700); font-weight: 600; }
.post__dot { width: 3px; height: 3px; border-radius: 50%; background: #C7CCDA; }

.post__title {
  margin-top: 10px;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-900);
  transition: color var(--dur) var(--ease);
}
.post:hover .post__title { color: var(--brand-700); }
.post__title a { display: block; }
/* 整卡可点：把链接热区扩展到卡片范围 */
.post__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
}

.post__excerpt {
  flex: 1;
  margin-top: 8px;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--ink-500);
}

.post__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--brand-600);
}
.post__more svg { width: 13px; height: 13px; transition: transform var(--dur) var(--ease); }
.post:hover .post__more svg { transform: translateX(3px); }

/* 置顶大卡：桌面横向排布 */
@media (min-width: 768px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .post--lead { grid-column: span 2; flex-direction: row; }
  .post--lead .post__cover { flex: 0 0 42%; aspect-ratio: 16 / 11; }
  .post--lead .post__title { font-size: 1.25rem; }
}

@media (min-width: 992px) {
  .post-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .post--lead { grid-column: span 3; }
  .post--lead .post__cover { flex: 0 0 40%; }
  .post--lead .post__body { justify-content: center; padding: 32px 36px; }
  .post--lead .post__excerpt { max-width: 48ch; }
}

.post-empty {
  padding: 56px 0;
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--ink-400);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: clamp(32px, 5vw, 44px);
}
.pagination a,
.pagination span {
  display: grid;
  place-items: center;
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  font-size: var(--fs-sm);
  color: var(--ink-500);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pagination a:hover { border-color: var(--brand-100); color: var(--ink-900); }
.pagination .is-current {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
  font-weight: 600;
}

/* ============================================================
   21. 内容详情页
   ============================================================ */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 110;
  width: 0;
  height: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(90deg, var(--brand-500), var(--teal-600));
  transition: width .1s linear;
}

.article { padding-block: clamp(26px, 4vw, 40px) var(--section-y); }
.article__head { max-width: 860px; }

.article__title {
  margin-top: 16px;
  font-size: clamp(1.625rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--ink-900);
  text-wrap: balance;
}
.article__lead {
  margin-top: 16px;
  max-width: 62ch;
  font-size: clamp(.9375rem, 1.7vw, 1.0625rem);
  line-height: 1.8;
  color: var(--ink-500);
}
.article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  color: var(--ink-400);
}
.article__meta span { display: inline-flex; align-items: center; gap: 6px; }
.article__meta svg { width: 14px; height: 14px; flex: none; }
.article__meta .post__cat { font-size: var(--fs-xs); }

.article__cover {
  display: grid;
  place-items: center;
  margin-top: clamp(24px, 4vw, 36px);
  aspect-ratio: 21 / 9;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(60% 80% at 20% 10%, rgba(99, 102, 241, .18), transparent 60%),
    radial-gradient(55% 70% at 88% 90%, rgba(13, 148, 136, .16), transparent 62%),
    linear-gradient(140deg, #EEF0FF, #E4EDFB 55%, #E9F6F3);
  overflow: hidden;
}
.article__cover svg { width: clamp(64px, 12vw, 104px); height: auto; color: var(--brand-600); opacity: .85; }

.article__layout {
  display: grid;
  gap: clamp(32px, 5vw, 48px);
  margin-top: clamp(28px, 4vw, 40px);
}

/* 正文排版 */
.prose {
  max-width: 72ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-700);
}
.prose > * { margin: 0; }
.prose > * + * { margin-top: 1.15em; }

.prose h2 {
  margin-top: 2.4em;
  font-size: clamp(1.25rem, 2.4vw, 1.5rem);
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -.01em;
  color: var(--ink-900);
  scroll-margin-top: 96px;
}
.prose h3 {
  margin-top: 1.9em;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink-900);
  scroll-margin-top: 96px;
}
.prose p { text-wrap: pretty; }
.prose ul,
.prose ol { padding-left: 1.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .5em; }
.prose li::marker { color: var(--brand-500); }
.prose strong { color: var(--ink-900); font-weight: 600; }
.prose a { color: var(--brand-700); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--brand-600); }

.prose blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  border-left: 3px solid var(--brand-500);
  border-radius: 0 14px 14px 0;
  background: var(--brand-50);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-700);
}
.prose blockquote p + p { margin-top: .8em; }
.prose blockquote cite {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-xs);
  font-style: normal;
  color: var(--ink-400);
}

.prose figure { margin: 2em 0; }
.prose figure svg {
  width: 100%;
  height: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}
.prose figcaption {
  margin-top: 10px;
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--ink-400);
  text-align: center;
}
.prose hr {
  margin: 2.4em 0;
  border: 0;
  border-top: 1px solid var(--line);
}

/* 指标小卡（正文内组件） */
.metric-cards {
  display: grid;
  gap: 12px;
  margin: 1.6em 0 !important;
  padding: 0;
  list-style: none;
}
.metric-cards > li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--canvas);
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
}
.metric-cards b { display: block; color: var(--ink-900); font-weight: 600; }
.metric-cards span {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--white);
  border: 1px solid var(--brand-100);
  color: var(--brand-600);
  font-size: var(--fs-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* 侧栏目录 */
.article__aside { display: none; }
.toc { position: sticky; top: 100px; }
.toc__title {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.toc ol { margin-top: 14px; border-left: 1px solid var(--line); }
.toc li { margin: 0; }
.toc a {
  display: block;
  margin-left: -1px;
  padding: 8px 0 8px 14px;
  border-left: 1px solid transparent;
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--ink-500);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.toc a:hover { color: var(--brand-700); }
.toc a.is-active {
  color: var(--brand-700);
  border-left-color: var(--brand-600);
  font-weight: 600;
}

/* 文章底部 */
.article__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  background: var(--canvas);
  font-size: var(--fs-xs);
  color: var(--ink-500);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.tag:hover { color: var(--brand-700); border-color: var(--brand-100); }

.article-nav {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}
.article-nav a {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.article-nav a:hover {
  transform: translateY(-2px);
  border-color: var(--brand-100);
  box-shadow: var(--shadow-sm);
}
.article-nav span { display: block; font-size: var(--fs-xs); color: var(--ink-400); }
.article-nav strong {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-900);
}
.article-nav .is-next { text-align: right; }

@media (min-width: 640px) {
  .article-nav { grid-template-columns: 1fr 1fr; }
}

/* 窄屏隐藏目录，读起来更干净 */
@media (min-width: 992px) {
  .article__layout { grid-template-columns: minmax(0, 1fr) 240px; align-items: start; }
  .article__aside { display: block; }
}

/* 触屏设备：取消卡片悬停位移 */
@media (hover: none) {
  .post:hover, .article-nav a:hover { transform: none; }
}

/* 筛选时隐藏卡片（覆盖 flex 显示） */
.post[hidden],
.post-empty[hidden] { display: none; }

/* 区块标题左对齐变体（相关阅读等） */
.section__head--left {
  max-width: none;
  margin: 0 0 clamp(24px, 4vw, 32px);
  text-align: left;
}
.article__note {
  font-size: var(--fs-xs);
  color: var(--ink-400);
}

/* ============================================================
   22. 关于我们
   ============================================================ */
.stats--inline {
  margin-top: 0;
  padding-block: clamp(32px, 5vw, 48px);
}

.about-intro { display: grid; gap: clamp(24px, 4vw, 40px); }
.about-intro__text p {
  font-size: clamp(.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.95;
  color: var(--ink-500);
}
.about-intro__text h2 + p { margin-top: 20px; }
.about-intro__text p + p { margin-top: 1.1em; }
.about-intro__text strong { color: var(--ink-900); font-weight: 600; }

.fact-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--canvas);
}
.fact-card h3 {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.fact-card ul { margin-top: 16px; display: grid; gap: 14px; }
.fact-card li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-500);
}
.fact-card li:last-child { padding-bottom: 0; border-bottom: 0; }
.fact-card b { color: var(--ink-900); font-weight: 600; white-space: nowrap; }

/* 时间轴 */
.timeline { position: relative; margin-top: clamp(32px, 4vw, 48px); }
.timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 9px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand-100), var(--line) 72%, transparent);
}
.timeline__item { position: relative; padding-left: 40px; }
.timeline__item + .timeline__item { margin-top: 28px; }
.timeline__dot {
  position: absolute;
  top: 3px;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--brand-500);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, .1);
}
.timeline__item:last-child .timeline__dot {
  background: var(--brand-600);
  border-color: var(--brand-600);
}
.timeline__year {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brand-700);
  font-variant-numeric: tabular-nums;
}
.timeline__title { margin-top: 4px; font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.timeline__desc { margin-top: 6px; font-size: var(--fs-sm); line-height: 1.7; color: var(--ink-500); }

/* 团队 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-top: clamp(32px, 4vw, 48px);
}
.member {
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
  text-align: center;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.member:hover { transform: translateY(-3px); border-color: var(--brand-100); box-shadow: var(--shadow-md); }
.member__avatar {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  box-shadow: 0 10px 22px -12px rgba(79, 70, 229, .8);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
}
.member--teal .member__avatar { background: linear-gradient(135deg, #14B8A6, #0F766E); box-shadow: 0 10px 22px -12px rgba(15, 118, 110, .8); }
.member--amber .member__avatar { background: linear-gradient(135deg, #F59E0B, #B45309); box-shadow: 0 10px 22px -12px rgba(180, 83, 9, .7); }
.member--slate .member__avatar { background: linear-gradient(135deg, #64748B, #334155); box-shadow: 0 10px 22px -12px rgba(51, 65, 85, .7); }
.member__name { font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.member__role { margin-top: 3px; font-size: var(--fs-xs); font-weight: 600; color: var(--brand-700); }
.member__bio { margin-top: 10px; font-size: var(--fs-sm); line-height: 1.7; color: var(--ink-500); }

/* 大字引言 */
.big-quote {
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--brand-100);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--brand-50), #FFFFFF 120%);
}
.big-quote p {
  font-size: clamp(1.125rem, 2.4vw, 1.5rem);
  font-weight: 600;
  line-height: 1.7;
  letter-spacing: -.01em;
  color: var(--brand-700);
  text-wrap: balance;
}
.big-quote cite {
  display: block;
  margin-top: 14px;
  font-size: var(--fs-xs);
  font-style: normal;
  color: var(--ink-400);
}

@media (min-width: 992px) {
  .about-intro {align-items: start; }
  .timeline { max-width: 760px; }
}

/* ============================================================
   23. 联系我们
   ============================================================ */
.contact-grid { display: grid; gap: clamp(24px, 4vw, 36px); }
.contact-info-col { order: -1; }

.info-stack { display: grid; gap: 12px; }

.info-card {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
}
.info-card__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  color: var(--brand-600);
}
.info-card__icon svg { width: 20px; height: 20px; }
.info-card__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink-400);
}
.info-card__value {
  margin-top: 2px;
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-900);
  word-break: break-word;
}
.info-card__value a { transition: color var(--dur) var(--ease); }
.info-card__value a:hover { color: var(--brand-700); }
.info-card__note { margin-top: 4px; font-size: var(--fs-xs); line-height: 1.6; color: var(--ink-500); }

/* 扫码卡 */
.qr-card {
  padding: 24px;
  border: 1px solid var(--brand-100);
  border-radius: var(--r-lg);
  background: linear-gradient(170deg, #FFFFFF, var(--brand-50) 130%);
  text-align: center;
}
.qr-card__title { font-size: var(--fs-h3); font-weight: 600; color: var(--ink-900); }
.qr-card__desc { margin-top: 6px; font-size: var(--fs-sm); color: var(--ink-500); }
.qr-card .qr { margin: 18px auto 16px; }
.qr-card .btn { width: 100%; }

/* 表单 */
.form-card {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}
.form-card__title { font-size: 1.125rem; font-weight: 700; letter-spacing: -.01em; color: var(--ink-900); }
.form-card__desc { margin-top: 6px; font-size: var(--fs-sm); color: var(--ink-500); }

.form-grid { display: grid; gap: 16px; margin-top: 22px; }

.field { display: grid; gap: 8px; }
.field > label,
.field > legend {
  padding: 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ink-700);
}
.field--set { border: 0; margin: 0; padding: 0; }
.req { color: #B91C1C; }

.input,
.textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  font-family: inherit;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--ink-900);
  -webkit-appearance: none;
  appearance: none;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.textarea { min-height: 116px; resize: vertical; }
.input::placeholder,
.textarea::placeholder { color: var(--ink-400); }
.input:focus,
.textarea:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .16);
}

/* 需求类型：单选胶囊 */
.radio-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.radio-chips label { position: relative; display: inline-flex; }
.radio-chips input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.radio-chips span {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  background: var(--white);
  font-size: var(--fs-sm);
  color: var(--ink-500);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.radio-chips label:hover span { border-color: var(--brand-100); color: var(--ink-900); }
.radio-chips input:checked + span {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}
.radio-chips input:focus-visible + span {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}

.form-note {
  margin-top: 14px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--ink-400);
}
.form-success {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(13, 148, 136, .24);
  border-radius: 12px;
  background: var(--teal-50);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--teal-700);
}
.form-success.is-on { display: block; }

.form-grid--2 { display: grid; gap: 16px; margin: 0; }
.form-grid .btn { width: 100%; }

@media (min-width: 560px) {
  .form-grid--2 { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 992px) {
  .contact-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: start; }
  .contact-info-col { order: 0; }
}

@media (hover: none) {
  .member:hover { transform: none; }
}

@media (min-width: 992px) and (max-width: 1139px) {
  .nav__list { gap: 0; }
  .nav__link { padding: 8px 10px; font-size: .8125rem; }
}