/* ==========================================================================
   北京天平司法鉴定中心 · v2.0 高端权威设计系统
   - 主色：深海军蓝 #0a2540
   - 强调：古铜金 #c9a45c
   - 底色：象牙白 #faf8f5
   - 字体：思源宋体（标题）+ 思源黑体（正文）+ Playfair Display（数字）
   ========================================================================== */

:root {
  /* ===== Brand Colors ===== */
  --c-navy-900: #0a1f3d;
  --c-navy-800: #0a2540;
  --c-navy-700: #14315e;
  --c-navy-600: #1e4d80;
  --c-navy-500: #2e6aaa;
  --c-navy-50:  #eef3fb;

  --c-gold-900: #6e5022;
  --c-gold-700: #9b7a3c;
  --c-gold-500: #c9a45c;
  --c-gold-400: #d8b878;
  --c-gold-100: #f6efdf;

  --c-ivory:    #faf8f5;
  --c-paper:    #f5f1ea;
  --c-cream:    #fcfaf6;

  --c-ink-900:  #1a1a1a;
  --c-ink-700:  #404040;
  --c-ink-500:  #6b6b6b;
  --c-ink-300:  #a8a8a8;
  --c-line:     #e1dcd1;

  --c-red-700:  #b8242c;
  --c-green-700:#1e7a47;
  --c-amber-700:#b87b14;

  /* Semantic */
  --brand-primary:   var(--c-navy-800);
  --brand-primary-d: var(--c-navy-900);
  --brand-primary-l: var(--c-navy-600);
  --brand-accent:    var(--c-gold-500);
  --brand-accent-d:  var(--c-gold-700);
  --brand-bg:        var(--c-ivory);
  --brand-paper:     var(--c-paper);
  --brand-cream:     var(--c-cream);
  --text-color:      var(--c-ink-900);
  --text-muted:      var(--c-ink-500);
  --border-color:    var(--c-line);

  /* ===== Typography ===== */
  --font-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', 'Microsoft YaHei', serif;
  --font-sans:  'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num:   'Playfair Display', 'Times New Roman', serif;

  /* ===== Spacing ===== */
  --sp-0: 0;
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;
  --sp-32: 128px;

  /* ===== Radius / Shadow ===== */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-pill: 9999px;

  --sh-sm: 0 2px 8px rgba(10,31,61,0.05);
  --sh-md: 0 8px 24px rgba(10,31,61,0.08);
  --sh-lg: 0 24px 48px rgba(10,31,61,0.12);
  --sh-gold: 0 12px 32px rgba(201,164,92,0.25);

  /* ===== Animation ===== */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.7, 0, 0.3, 1);
  --t-fast: 180ms;
  --t-med: 360ms;
  --t-slow: 720ms;

  /* ===== Layout ===== */
  --container: 1280px;
  --gutter: 24px;
  --header-h: 80px;
  --topbar-h: 36px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-color);
  background: var(--brand-bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  color: var(--brand-primary-d);
  margin: 0;
  letter-spacing: 0.02em;
  font-weight: 700;
}
h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.15; }
h2 { font-size: clamp(28px, 3.5vw, 44px); line-height: 1.25; }
h3 { font-size: clamp(20px, 2.2vw, 28px); line-height: 1.35; }
h4 { font-size: 20px; line-height: 1.4; }
p  { margin: 0 0 16px; }
a  { color: var(--brand-primary); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--brand-accent-d); }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============== Header ============== */
.topbar {
  background: linear-gradient(90deg, var(--c-navy-900), var(--c-navy-700));
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
}
.topbar a { color: var(--c-gold-400); }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar__inner > div { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-h);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--brand-primary-d);
}
.brand__mark {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-l));
  color: var(--brand-accent);
  display: grid; place-items: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  box-shadow: var(--sh-md);
  overflow: hidden;
  flex-shrink: 0;
}
.brand__mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2px;
}
.brand__logo {
  height: 44px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-family: var(--font-serif); font-weight: 700; font-size: 18px; letter-spacing: 0.05em; }
.brand__slogan { font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--brand-accent-d); }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink-700);
  position: relative;
  white-space: nowrap;
}
.nav a:hover { color: var(--brand-primary); }
.nav a.is-active { color: var(--brand-primary); }
.nav a.is-active::after {
  content: '';
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 2px;
  background: var(--brand-accent);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--r-sm);
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 18px;
}

/* ============== Hero ============== */
.hero {
  position: relative;
  background:
    linear-gradient(90deg, rgba(10,31,61,0.92) 0%, rgba(10,31,61,0.76) 55%, rgba(10,31,61,0.55) 100%),
    url('../assets/hero/hero-paternity.webp') center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
  padding: clamp(60px, 10vw, 140px) 0 clamp(60px, 10vw, 120px);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 24px);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--c-gold-400);
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero__eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--c-gold-400);
}
.hero h1 {
  color: #fff;
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero h1 .accent { color: var(--c-gold-400); font-style: italic; }
.hero p {
  font-size: clamp(16px, 1.4vw, 19px);
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: 36px;
}
.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t-med) var(--ease-out);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand-accent);
  color: var(--c-navy-900);
  box-shadow: var(--sh-gold);
}
.btn-primary:hover {
  background: var(--c-gold-400);
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(201,164,92,0.35);
  color: var(--c-navy-900);
}
.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border-color: rgba(255,255,255,0.25);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-color: var(--c-gold-400);
}
.btn-ghost {
  background: transparent;
  color: var(--brand-primary);
  border-color: var(--border-color);
}
.btn-ghost:hover { border-color: var(--brand-primary); color: var(--brand-primary); }

/* Hero trust badges */
.hero__badges {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero__badge {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero__badge-num {
  font-family: var(--font-num);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  color: var(--c-gold-400);
  line-height: 1;
}
.hero__badge-label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.7);
}

/* Hero wizard card */
.hero__wizard {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-xl);
  padding: 32px;
  backdrop-filter: blur(20px);
}

/* ============== Stats Strip ============== */
.stats-strip {
  background: var(--c-navy-900);
  color: #fff;
  border-top: 4px solid var(--brand-accent);
}
.stats-strip__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 48px 0;
}
.stats-strip__item {
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.1);
  padding: 0 24px;
}
.stats-strip__item:last-child { border-right: none; }
.stats-strip__num {
  font-family: var(--font-num);
  font-size: clamp(40px, 4.5vw, 56px);
  font-weight: 700;
  color: var(--c-gold-400);
  line-height: 1;
  margin-bottom: 8px;
}
.stats-strip__num .suffix {
  font-size: 0.6em;
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  margin-left: 2px;
}
.stats-strip__label {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.05em;
}

/* ============== Sections ============== */
.section { padding: clamp(60px, 8vw, 100px) 0; }
.section--paper { background: var(--brand-paper); }
.section--cream { background: var(--brand-cream); }
.section--navy { background: var(--c-navy-800); color: #fff; }
.section--navy h2 { color: #fff; }

.section__head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto clamp(40px, 6vw, 64px);
}
.section__eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--brand-accent-d);
  margin-bottom: 16px;
  font-weight: 600;
}
.section__title { margin-bottom: 16px; }
.section__lead { font-size: 17px; color: var(--text-muted); margin: 0; }

/* ============== Service Cards ============== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  position: relative;
  background: #fff;
  border-radius: var(--r-lg);
  padding: 40px 32px;
  border: 1px solid var(--border-color);
  transition: all var(--t-med) var(--ease-out);
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--brand-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med) var(--ease-out);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-lg);
  border-color: rgba(201,164,92,0.4);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card__icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--c-navy-50), #fff);
  display: grid; place-items: center;
  margin-bottom: 20px;
  overflow: hidden;
  box-shadow: var(--sh-sm);
}
.service-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.service-card__icon svg, .service-card__icon .emoji {
  font-size: 32px;
}
.service-card h3 { color: var(--brand-primary-d); margin-bottom: 12px; }
.service-card__desc { color: var(--text-muted); margin-bottom: 20px; line-height: 1.7; }
.service-card__price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 0;
  border-top: 1px dashed var(--border-color);
  margin-bottom: 16px;
}
.service-card__price-label {
  font-size: 12px;
  color: var(--text-muted);
}
.service-card__price-value {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: var(--brand-accent-d);
}
.service-card__price-suffix {
  font-size: 13px;
  color: var(--text-muted);
}
.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--brand-primary);
}
.service-card__link::after {
  content: '→';
  transition: transform var(--t-fast);
}
.service-card:hover .service-card__link::after { transform: translateX(4px); }

/* ============== Wizard ============== */
.wizard {
  background: #fff;
  border-radius: var(--r-xl);
  box-shadow: var(--sh-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
}
.wizard__progress {
  display: flex;
  padding: 24px 32px;
  background: var(--brand-cream);
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}
.wizard__step-indicator {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.wizard__step-indicator .num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border-color);
  display: grid; place-items: center;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-serif);
}
.wizard__step-indicator.is-active { color: var(--brand-primary); font-weight: 600; }
.wizard__step-indicator.is-active .num {
  background: var(--brand-primary);
  color: var(--brand-accent);
  border-color: var(--brand-primary);
}
.wizard__step-indicator.is-done .num { background: var(--brand-accent); color: var(--c-navy-900); border-color: var(--brand-accent); }
.wizard__step-indicator.is-done .num::before { content: '✓'; }
.wizard__step-indicator.is-done .num .original-num { display: none; }

.wizard__body {
  padding: 32px;
  min-height: 240px;
}
.wizard__step { animation: fadeUp 360ms var(--ease-out); }
.wizard__step[hidden] { display: none; }
.wizard__step h3 { margin-bottom: 8px; }
.wizard__step .lead { color: var(--text-muted); margin-bottom: 24px; font-size: 15px; }

.wizard__options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.wizard__option {
  border: 1.5px solid var(--border-color);
  border-radius: var(--r-md);
  padding: 16px;
  cursor: pointer;
  text-align: left;
  background: #fff;
  font-family: inherit;
  transition: all var(--t-fast);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.wizard__option:hover {
  border-color: var(--brand-primary);
  background: var(--c-navy-50);
}
.wizard__option.is-selected {
  border-color: var(--brand-accent);
  background: var(--c-gold-100);
}
.wizard__option input { display: none; }
.wizard__option-icon { font-size: 24px; flex: 0 0 auto; }
.wizard__option-text { flex: 1; }
.wizard__option-text strong { display: block; font-family: var(--font-serif); font-size: 16px; color: var(--brand-primary-d); margin-bottom: 4px; }
.wizard__option-text span { font-size: 13px; color: var(--text-muted); }

.wizard__actions {
  padding: 20px 32px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  background: var(--brand-cream);
}

.wizard__result {
  background: var(--c-gold-100);
  border-left: 4px solid var(--brand-accent);
  padding: 16px;
  margin-top: 16px;
  border-radius: var(--r-sm);
  display: flex;
  gap: 12px;
}
.wizard__result .icon { font-size: 24px; }
.wizard__result h4 { margin: 0 0 6px; color: var(--brand-primary-d); }
.wizard__result p { margin: 0; font-size: 14px; color: var(--c-ink-700); }

/* ============== Process Timeline ============== */
.process {
  position: relative;
}
.process__line {
  position: absolute;
  left: 50%;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--brand-accent) 20%, var(--brand-accent) 80%, transparent);
  transform: translateX(-50%);
}
.process-step {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  gap: 32px;
  align-items: center;
  padding: 28px 0;
}
.process-step__num {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--brand-accent);
  color: var(--brand-accent-d);
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  display: grid; place-items: center;
  position: relative;
  z-index: 2;
  box-shadow: var(--sh-md);
}
.process-step__content {
  background: #fff;
  padding: 24px 28px;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  border: 1px solid var(--border-color);
}
.process-step:nth-child(odd) .process-step__content:first-child { text-align: right; }
.process-step:nth-child(even) .process-step__content:last-child { text-align: left; }
.process-step__title { font-family: var(--font-serif); font-size: 22px; color: var(--brand-primary-d); margin-bottom: 6px; }
.process-step__title small { display: block; font-size: 13px; color: var(--brand-accent-d); margin-top: 4px; }
.process-step__desc { font-size: 14px; color: var(--text-muted); margin: 0; }

/* ============== Case Library ============== */
.case-toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  align-items: center;
}
.case-toolbar__input {
  flex: 1;
  min-width: 220px;
  padding: 12px 18px;
  border: 1px solid var(--border-color);
  border-radius: var(--r-pill);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
}
.case-toolbar__input:focus { outline: none; border-color: var(--brand-primary); box-shadow: 0 0 0 4px rgba(20,49,94,0.08); }

.case-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}
.case-filter {
  padding: 8px 18px;
  border-radius: var(--r-pill);
  background: transparent;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-muted);
  font-family: inherit;
  transition: all var(--t-fast);
}
.case-filter.is-active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.case-card {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: all var(--t-med) var(--ease-out);
}
.case-card:hover {
  border-color: var(--brand-accent);
  box-shadow: var(--sh-md);
}
.case-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.case-card__tag {
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
}
.case-card__tag--paternity { background: #e8f1ff; color: var(--brand-primary); }
.case-card__tag--clinical { background: #fde9ea; color: var(--c-red-700); }
.case-card__tag--document { background: #f4ead0; color: var(--c-gold-900); }
.case-card__year { font-size: 12px; color: var(--text-muted); margin-left: auto; }
.case-card__title {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--brand-primary-d);
  margin-bottom: 8px;
}
.case-card__desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
}
.case-card__meta-item { display: inline-flex; align-items: center; gap: 4px; }
.case-card__meta strong { color: var(--brand-primary-d); }

.case-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

/* ============== Qualification Wall ============== */
.quali-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.quali-tile {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--t-med);
}
.quali-tile:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--brand-accent);
  transform: translateY(-4px);
}
.quali-tile__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-accent), var(--c-gold-400));
  color: var(--c-navy-900);
  display: grid; place-items: center;
  font-size: 28px;
  font-family: var(--font-serif);
}
.quali-tile h4 { color: #fff; font-size: 18px; margin-bottom: 4px; }
.quali-tile__code {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  font-family: var(--font-num);
  letter-spacing: 0.05em;
}

/* ============== Expert Grid ============== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all var(--t-med);
}
.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-lg);
}
.expert-card__avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-l));
  color: var(--brand-accent);
  display: grid; place-items: center;
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  box-shadow: var(--sh-md);
  overflow: hidden;
}
.expert-card__name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-primary-d);
  margin-bottom: 4px;
}
.expert-card__title {
  font-size: 13px;
  color: var(--brand-accent-d);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.expert-card__achievements {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  text-align: left;
}
.expert-card__achievements li {
  padding: 4px 0;
  padding-left: 18px;
  position: relative;
}
.expert-card__achievements li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--brand-accent);
  font-size: 10px;
  top: 6px;
}

/* ============== FAQ ============== */
.faq {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--t-fast);
}
.faq-item.is-open {
  border-color: var(--brand-accent);
  box-shadow: var(--sh-md);
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--brand-primary-d);
}
.faq-q__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand-cream);
  display: grid; place-items: center;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--brand-primary);
  transition: transform var(--t-med);
  flex: 0 0 auto;
}
.faq-item.is-open .faq-q__icon {
  transform: rotate(45deg);
  background: var(--brand-accent);
  color: var(--c-navy-900);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-med) var(--ease-in-out);
}
.faq-item.is-open .faq-a { max-height: 600px; }
.faq-a__inner {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}
.faq-a__inner cite {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  font-style: normal;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
}

/* ============== CTA Band ============== */
.cta-band {
  background:
    linear-gradient(135deg, rgba(10,31,61,0.95), rgba(20,49,94,0.9)),
    var(--c-navy-900);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 20%, rgba(201,164,92,0.2), transparent 50%);
}
.cta-band h2 { color: #fff; margin-bottom: 16px; position: relative; }
.cta-band p { color: rgba(255,255,255,0.8); font-size: 17px; position: relative; }
.cta-band__actions { display: inline-flex; gap: 16px; flex-wrap: wrap; justify-content: center; position: relative; margin-top: 24px; }

/* ============== Footer ============== */
.site-footer {
  background: var(--c-navy-900);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-footer h4 {
  color: var(--c-gold-400);
  font-size: 14px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { padding: 6px 0; }
.site-footer a { color: rgba(255,255,255,0.7); font-size: 14px; }
.site-footer a:hover { color: var(--c-gold-400); }

.footer-brand .brand__name { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-meta { font-size: 12px; color: rgba(255,255,255,0.4); line-height: 1.6; }

.site-footer__legal {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ============== Floating Actions ============== */
.floating {
  position: fixed;
  right: 20px;
  bottom: 100px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.floating a {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 22px;
  box-shadow: var(--sh-md);
  transition: all var(--t-fast);
}
.floating a:hover { transform: scale(1.06); }
.floating a--accent { background: var(--brand-accent); color: var(--c-navy-900); }
.floating a--wechat { background: #07c160; }
.floating a--phone { background: var(--c-red-700); }

/* ============== Page Hero (sub pages) ============== */
.page-hero {
  background:
    radial-gradient(800px 300px at 50% 100%, rgba(201,164,92,0.18), transparent 60%),
    linear-gradient(180deg, var(--c-navy-900) 0%, var(--c-navy-800) 100%);
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 100px 0 64px;
  text-align: center;
  position: relative;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 60px);
}
.page-hero__inner { position: relative; }
.page-hero .breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  gap: 8px;
}
.page-hero .breadcrumb a { color: var(--c-gold-400); }
.page-hero h1 { color: #fff; margin-bottom: 16px; font-size: clamp(32px, 4vw, 48px); }
.page-hero .lead { font-size: 17px; color: rgba(255,255,255,0.8); max-width: 720px; margin: 0 auto; }

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  padding: 24px 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb .current { color: var(--brand-primary); font-weight: 500; }
.breadcrumb .sep { color: var(--text-muted); }

/* ============== Animations ============== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.reveal { opacity: 0; transition: all 720ms var(--ease-out); }
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal--up { transform: translateY(30px); }
.reveal--left { transform: translateX(-30px); }
.reveal--right { transform: translateX(30px); }

/* Counter numbers */
.count-num { font-family: var(--font-num); }

/* ============== Misc ============== */
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: var(--c-gold-100);
  color: var(--c-gold-900);
  font-size: 12px;
  font-weight: 500;
}
.tag-row .tag--accent { background: var(--c-navy-50); color: var(--brand-primary); }

.divider-gold {
  height: 4px;
  width: 60px;
  background: var(--brand-accent);
  margin: 0 auto 28px;
  border-radius: 2px;
}

/* Citation */
.cite {
  font-size: 13px;
  color: var(--text-muted);
  font-style: normal;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  background: var(--c-gold-100);
  border-radius: var(--r-pill);
  margin-left: 6px;
}

/* AI summary block (GEO) */
.ai-summary {
  background: linear-gradient(135deg, var(--c-navy-50), #fff);
  border: 1px dashed var(--brand-accent);
  border-radius: var(--r-md);
  padding: 20px 24px;
  margin: 32px 0;
  position: relative;
}
.ai-summary::before {
  content: '★ LLM-OPTIMIZED';
  position: absolute;
  top: -10px; left: 16px;
  background: var(--brand-accent);
  color: var(--c-navy-900);
  padding: 2px 10px;
  font-size: 11px;
  letter-spacing: 0.1em;
  border-radius: var(--r-pill);
  font-weight: 700;
}
.ai-summary h4 {
  font-size: 14px;
  color: var(--brand-primary-d);
  margin-bottom: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
}
.ai-summary__copy {
  position: absolute;
  top: 16px; right: 16px;
  background: transparent;
  border: 1px solid var(--brand-primary);
  color: var(--brand-primary);
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}
.ai-summary__copy:hover { background: var(--brand-primary); color: #fff; }
.ai-summary p {
  margin: 0;
  color: var(--c-ink-700);
  font-size: 15px;
  line-height: 1.7;
}

/* Standard reference */
.std-ref {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--r-md);
  padding: 20px 24px;
  margin: 16px 0;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.std-ref__num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 28px;
  color: var(--brand-accent);
  font-weight: 700;
  line-height: 1;
}
.std-ref h5 { margin: 0 0 6px; font-size: 16px; color: var(--brand-primary-d); font-family: var(--font-sans); font-weight: 600; }
.std-ref p { margin: 0; font-size: 13px; color: var(--text-muted); }

/* Calculation result */
.calc-result {
  background: linear-gradient(135deg, var(--c-navy-800), var(--c-navy-900));
  color: #fff;
  border-radius: var(--r-lg);
  padding: 28px;
  margin-top: 16px;
}
.calc-result__price {
  font-family: var(--font-num);
  font-size: 48px;
  font-weight: 700;
  color: var(--c-gold-400);
  line-height: 1;
}
.calc-result__price small { font-size: 16px; color: rgba(255,255,255,0.6); margin-left: 8px; }
.calc-result__breakdown {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  font-size: 13px;
}
.calc-result__breakdown li {
  padding: 4px 0;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(255,255,255,0.1);
}
.calc-result__breakdown li:last-child { border-bottom: none; }

/* Mobile */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .stats-strip__inner { grid-template-columns: 1fr 1fr; }
  .stats-strip__item:nth-child(2) { border-right: none; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .quali-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .case-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 0; box-shadow: var(--sh-lg); }
  .nav.open { display: flex; }
  .stats-strip__inner { grid-template-columns: 1fr; }
  .stats-strip__item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding: 16px 0; }
  .stats-strip__item:last-child { border-bottom: none; }
  .services-grid, .expert-grid, .quali-grid { grid-template-columns: 1fr; }
  .process-step { grid-template-columns: 1fr; }
  .process__line { display: none; }
  .process-step__content { text-align: left !important; }
  .footer-grid { grid-template-columns: 1fr; }
  .wizard__progress { padding: 16px; gap: 6px; }
  .wizard__step-indicator span:not(.num) { display: none; }
  .wizard__options { grid-template-columns: 1fr; }
  .hero { padding: 80px 0 60px; }
  .section { padding: 60px 0; }
  .cta-band { padding: 40px 24px; }
  .ai-summary { padding: 32px 16px 20px; }
}

/* Selection */
::selection { background: var(--c-gold-500); color: var(--c-navy-900); }