/* ============================================================
   新一代智能制造研学团@合肥站 — 官网样式
   深色工业科技风 · Tesla 式首屏 · 产业链时间轴
   ============================================================ */

:root {
  /* 中性色（沿用现有设计体系） */
  --n-00: #ffffff;
  --n-50: #f5f6f7;
  --n-100: #f2f3f5;
  --n-200: #eff0f1;
  --n-300: #dee0e3;
  --n-400: #d0d3d6;
  --n-500: #bbbfc4;
  --n-600: #8f959e;
  --n-700: #646a73;
  --n-800: #373c43;
  --n-900: #2b2f36;
  --n-950: #1f2329;
  /* 深色章节 */
  --ink-900: #14161a;
  --ink-800: #1a1d23;
  --ink-700: #23272f;
  --ink-line: rgba(255, 255, 255, 0.12);
  /* 品牌色 */
  --blue-600: #336df4;
  --blue-700: #1456f0;
  --blue-300: #8fb0ff;
  --amber-500: #d9a441;
  /* 语义 */
  --text: var(--n-950);
  --text-sub: var(--n-700);
  --border: var(--n-300);
  --radius: 12px;
  --container: 1120px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft Yahei", -apple-system, "system-ui", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--n-00);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
.container-narrow { max-width: 820px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }

.btn-primary { background: var(--blue-600); color: #fff; }
.btn-primary:hover { background: var(--blue-700); }

.btn-light { background: #fff; color: var(--n-950); }
.btn-light:hover { background: rgba(255, 255, 255, 0.88); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); border-color: #fff; }

.btn-ghost-dark {
  background: transparent;
  color: var(--n-800);
  border-color: var(--n-400);
}
.btn-ghost-dark:hover { background: var(--n-100); }

.btn-block { width: 100%; }
.btn-sm { padding: 8px 20px; font-size: 14px; }

/* ============ 顶部导航 ============ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(20, 22, 26, 0.82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--ink-line);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
}
.nav-brand span { color: var(--blue-300); font-weight: 500; }
.nav-brand:hover { text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  transition: color 0.15s ease;
}
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links .nav-cta {
  background: #fff;
  color: var(--n-950);
  padding: 7px 18px;
  border-radius: 999px;
  font-weight: 500;
}
.nav-links .nav-cta:hover { background: rgba(255, 255, 255, 0.85); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero（Tesla 式） ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url("../assets/images/hero-bg.jpeg") center/cover no-repeat;
  transform: scale(1.02);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(8, 10, 14, 0.72) 0%,
    rgba(8, 10, 14, 0.45) 45%,
    rgba(8, 10, 14, 0.78) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 96px 24px 80px;
  max-width: 920px;
}
.hero-kicker {
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  letter-spacing: 0.16em;
  color: var(--blue-300);
  font-weight: 600;
  margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(2.1rem, 5.6vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
}
.hero-question {
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 16px;
}
.hero-desc {
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  color: rgba(255, 255, 255, 0.78);
  max-width: 720px;
  margin: 0 auto 26px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 34px;
}
.hero-meta span {
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.hero-actions .btn { min-width: 190px; }

.hero-scroll {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.75);
  animation: hero-bounce 2.2s ease-in-out infinite;
}
@keyframes hero-bounce {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.75; }
  50% { transform: translate(-50%, 8px); opacity: 1; }
}

/* ============ 关键信息条 ============ */
.factbar {
  background: var(--ink-900);
  border-top: 1px solid var(--ink-line);
  color: #fff;
}
.factbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.fact strong {
  display: block;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.fact span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* ============ Section 通用 ============ */
.section { padding: 88px 0; }
.section-alt { background: var(--n-50); }
.section-dark {
  background: var(--ink-900);
  color: #fff;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-lead { color: rgba(255, 255, 255, 0.75); }

.section-kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--blue-600);
  margin-bottom: 12px;
}
.section-dark .section-kicker { color: var(--blue-300); }

.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 18px;
  max-width: 900px;
}
.section-lead {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  color: var(--text-sub);
  max-width: 880px;
  margin-bottom: 20px;
}
.section-note {
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-sub);
  border-left: 3px solid var(--blue-600);
  padding-left: 14px;
}
.section-cta { text-align: center; margin-top: 48px; }

/* ============ 网格与卡片 ============ */
.grid { display: grid; gap: 20px; margin-top: 36px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.card p, .card li { font-size: 14.5px; color: var(--text-sub); }
.card-accent { border-top: 3px solid var(--blue-600); }
.card-dark {
  background: var(--ink-800);
  border-color: var(--ink-700);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.card-dark p { color: rgba(255, 255, 255, 0.72); }
.card-dark .btn { margin-top: 6px; }

.check-list { list-style: none; }
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 14.5px;
  color: var(--text-sub);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 5px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--blue-600);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='white' d='M6.2 11.3 3.4 8.5l-1 1 3.8 3.8 7.4-7.4-1-1z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='white' d='M6.2 11.3 3.4 8.5l-1 1 3.8 3.8 7.4-7.4-1-1z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.section-dark .check-list li,
.price-card .check-list li { color: rgba(255, 255, 255, 0.82); }

/* ============ 研学方法 ============ */
.method-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  margin-top: 40px;
  align-items: start;
}
.method-steps { display: flex; flex-direction: column; gap: 16px; }
.method-step {
  display: flex;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.step-no {
  flex: none;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--n-950);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}
.method-step h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.method-step h3 em {
  font-style: normal;
  font-size: 13px;
  font-weight: 500;
  color: var(--blue-600);
  margin-left: 6px;
}
.method-step p { font-size: 14px; color: var(--text-sub); }
.method-figure img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  padding: 10px;
}
.method-figure figcaption {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--text-sub);
}

/* ============ 产业链动线 ============ */
.chain {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 40px 0 56px;
}
.chain-node {
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: 10px;
  padding: 14px 20px;
  text-align: center;
  min-width: 150px;
}
.chain-node strong { display: block; font-size: 16px; }
.chain-node span { font-size: 12.5px; color: rgba(255, 255, 255, 0.6); }
.chain-arrow {
  align-self: center;
  color: var(--blue-300);
  font-size: 26px;
  font-weight: 300;
}

/* ============ 行程时间轴 ============ */
.day-block { margin-bottom: 56px; }
.day-head {
  border-left: 4px solid var(--blue-600);
  padding-left: 18px;
  margin-bottom: 28px;
}
.day-head h3 { font-size: clamp(1.25rem, 2.4vw, 1.6rem); font-weight: 700; margin: 8px 0 4px; }
.day-head p { color: rgba(255, 255, 255, 0.6); font-size: 14.5px; }
.day-badge {
  display: inline-block;
  background: var(--blue-600);
  color: #fff;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 4px 12px;
  border-radius: 6px;
}

.timeline {
  list-style: none;
  position: relative;
  padding-left: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 148px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-600), rgba(51, 109, 244, 0.15));
}
.tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 44px;
  padding-bottom: 26px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-time {
  text-align: right;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--blue-300);
  padding-top: 18px;
  font-variant-numeric: tabular-nums;
}
.tl-body {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.tl-body::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 24px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--blue-600);
  box-shadow: 0 0 0 4px rgba(51, 109, 244, 0.22);
}
.tl-body h4 { font-size: 17px; font-weight: 700; margin-bottom: 4px; color: #fff; }
.tl-place {
  font-size: 13px;
  color: var(--blue-300);
  margin-bottom: 8px;
  font-weight: 500;
}
.tl-body p { font-size: 14.5px; color: rgba(255, 255, 255, 0.78); margin-bottom: 8px; }
.tl-body p:last-child { margin-bottom: 0; }
.tl-body strong { color: #fff; }
.tl-question {
  border-left: 3px solid var(--amber-500);
  padding-left: 12px;
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
}
.tl-next { color: rgba(255, 255, 255, 0.5) !important; font-size: 13.5px !important; }

/* ============ 参访点详情卡 ============ */
.visit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 16px;
}
.visit-card {
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.visit-card img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}
.visit-body { padding: 22px; }
.visit-tag {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--blue-300);
  margin-bottom: 6px;
}
.visit-body h4 { font-size: 19px; font-weight: 700; margin-bottom: 14px; color: #fff; }
.visit-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ink-line);
}
.visit-stats strong {
  display: block;
  font-size: 17px;
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.visit-stats span { font-size: 12px; color: rgba(255, 255, 255, 0.55); }
.visit-body ul { list-style: none; }
.visit-body li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 8px;
}
.visit-body li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-600);
}

/* ============ 行程逻辑总结 ============ */
.route-summary {
  margin-top: 48px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-left: 4px solid var(--blue-600);
  border-radius: var(--radius);
  padding: 28px;
}
.route-summary h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; color: #fff; }
.route-summary p { font-size: 14.5px; color: rgba(255, 255, 255, 0.78); margin-bottom: 10px; }
.route-summary strong { color: #fff; }
.route-note {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--ink-line);
  font-size: 13.5px !important;
  color: rgba(255, 255, 255, 0.55) !important;
}

/* ============ 成果照片 ============ */
.photo-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 36px;
}
.photo-row figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
}
.photo-row img { width: 100%; height: 200px; object-fit: cover; }
.photo-row figcaption {
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--text-sub);
}

/* ============ AISOP 案例 ============ */
.case-grid { display: flex; flex-direction: column; gap: 24px; margin-top: 36px; }
.case-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.case-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.case-meta { font-size: 13.5px; color: var(--blue-600); margin-bottom: 18px; }
.case-card img {
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 18px;
  max-height: 320px;
  object-fit: cover;
  width: 100%;
}
.case-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.case-cols h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--n-900);
  margin-bottom: 8px;
}
.case-cols ul { padding-left: 18px; }
.case-cols li { font-size: 14px; color: var(--text-sub); margin-bottom: 6px; }
.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
  padding: 18px;
  background: var(--n-50);
  border-radius: 10px;
  text-align: center;
}
.case-stats strong { display: block; font-size: 18px; font-weight: 800; color: var(--blue-700); }
.case-stats span { font-size: 12.5px; color: var(--text-sub); }
.case-note { margin-top: 16px; font-size: 13.5px; color: var(--text-sub); }

/* ============ 行业标签 ============ */
.industry-row {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
}
.industry-row ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.industry-row li {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  background: #fff;
  font-size: 13.5px;
}

/* ============ 嘉宾 ============ */
.speaker-card {
  display: flex;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 0;
}
.speaker-card img {
  flex: none;
  width: 96px; height: 96px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--n-200);
}
.speaker-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.speaker-card h3 span {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--blue-600);
  margin-left: 6px;
}
.speaker-card p { font-size: 14px; color: var(--text-sub); }
.speaker-topic {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--n-50);
  border-radius: 8px;
  border-left: 3px solid var(--blue-600);
}

/* ============ 口碑 & 关于 ============ */
.quote {
  margin: 32px 0 40px;
  padding: 28px 32px;
  background: var(--n-50);
  border-left: 4px solid var(--blue-600);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.quote p { font-size: 16px; font-style: italic; color: var(--n-800); margin-bottom: 12px; }
.quote footer { font-size: 14px; color: var(--text-sub); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.about-grid h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.about-grid p { font-size: 14.5px; color: var(--text-sub); }

/* ============ FAQ ============ */
.faq-list { margin-top: 36px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-size: 15.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex: none;
  font-size: 20px;
  font-weight: 400;
  color: var(--n-600);
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding: 0 22px 18px;
  font-size: 14.5px;
  color: var(--text-sub);
}
.tag-pending {
  display: inline-block;
  background: #fdf3e3;
  color: #9a6b1a;
  border: 1px solid #efd9a7;
  font-size: 12px;
  font-weight: 500;
  padding: 1px 8px;
  border-radius: 999px;
  margin: 0 4px;
  vertical-align: baseline;
}

/* ============ 报名区 ============ */
.apply-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
  margin-top: 40px;
  align-items: start;
}
.apply-info { display: flex; flex-direction: column; gap: 20px; }
.price-card, .contact-card {
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  padding: 26px;
}
.price {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 18px;
}
.price small { font-size: 16px; font-weight: 500; color: rgba(255, 255, 255, 0.6); margin-left: 4px; }
.price-note { font-size: 13px; color: rgba(255, 255, 255, 0.55); margin-top: 14px; }
.contact-card h3 { font-size: 15px; font-weight: 700; color: #fff; margin: 16px 0 6px; }
.contact-card h3:first-child { margin-top: 0; }
.contact-card p { font-size: 14px; color: rgba(255, 255, 255, 0.75); }
.contact-card a { color: var(--blue-300); }

.apply-form {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px;
  color: var(--text);
}
.apply-form h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.form-note { font-size: 13px; color: var(--text-sub); margin-bottom: 20px; }
.req { color: #d4380d; }
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}
.field input, .field textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 14.5px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(51, 109, 244, 0.14);
}
.field input[aria-invalid="true"] {
  border-color: #d4380d;
  box-shadow: 0 0 0 3px rgba(212, 56, 13, 0.1);
}
.field-error {
  display: none;
  font-size: 12.5px;
  color: #d4380d;
  margin-top: 5px;
}
.field-error.show { display: block; }
.form-footnote { font-size: 12.5px; color: var(--n-600); margin-top: 14px; }

/* ============ Footer ============ */
.site-footer {
  background: var(--ink-900);
  border-top: 1px solid var(--ink-line);
  padding: 44px 0;
  color: rgba(255, 255, 255, 0.65);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: 24px;
  font-size: 13.5px;
}
.footer-brand { color: #fff; font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.site-footer a { color: var(--blue-300); }

/* ============ Modal ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(10, 12, 16, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-hidden { display: none !important; }
.modal-content {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.35);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--n-200);
}
.modal-head h3 { font-size: 17px; font-weight: 700; }
.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--n-600);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}
.modal-close:hover { color: var(--n-950); }
.modal-body { padding: 22px; }
.quiz-label { font-size: 14.5px; font-weight: 600; margin: 16px 0 10px; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-options label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--n-800);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.quiz-options label:hover { background: var(--n-50); }
.quiz-options input { margin-top: 3px; accent-color: var(--blue-600); }
.quiz-options input:checked + span { font-weight: 600; }
#quiz-submit { margin-top: 20px; }
#quiz-error.show { display: block; margin-top: 12px; }
.fit-result-title { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.fit-result-list { padding-left: 18px; margin-bottom: 14px; }
.fit-result-list li { font-size: 14px; color: var(--text-sub); margin-bottom: 8px; }
.fit-result-verdict {
  background: var(--n-50);
  border-left: 3px solid var(--blue-600);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--n-800);
}
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 22px;
}

/* ============ Toast ============ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  background: var(--n-950);
  color: #fff;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  z-index: 80;
  max-width: min(90vw, 480px);
  text-align: center;
  animation: toast-in 0.2s ease-out;
}
.toast.toast-error { background: #b42318; }
.toast.toast-success { background: #067647; }
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .method-grid { grid-template-columns: 1fr; }
  .visit-grid { grid-template-columns: 1fr; }
  .apply-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .case-stats { grid-template-columns: repeat(3, 1fr); }
  .factbar-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(20, 22, 26, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
    border-bottom: 1px solid var(--ink-line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 13px 24px;
    font-size: 15px;
  }
  .nav-links .nav-cta {
    margin: 10px 24px 0;
    text-align: center;
    padding: 12px;
  }

  /* 时间轴转单列 */
  .timeline::before { left: 7px; }
  .tl-item { grid-template-columns: 1fr; gap: 8px; padding-left: 28px; }
  .tl-time { text-align: left; padding-top: 0; font-size: 14.5px; }
  .tl-body::before { left: -27px; top: 6px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .case-cols { grid-template-columns: 1fr; }
  .case-stats { grid-template-columns: 1fr; text-align: left; }
  .photo-row { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .speaker-card { flex-direction: column; align-items: flex-start; }
  .chain { flex-direction: column; align-items: stretch; }
  .chain-arrow { transform: rotate(90deg); }
  .factbar-inner { grid-template-columns: 1fr 1fr; gap: 14px; }
  .hero-actions .btn { width: 100%; }
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-scroll { animation: none; }
  * { transition: none !important; }
}