/* AI玄箓-智能体校园 官网样式（零依赖，移动优先；配色：青 #00B2A9 / 藏青 #041E42 / 石板灰 #8D99AE / 浅灰 #F4F4F4，橙 #FC7A1E 仅用于主 CTA） */
:root {
  --teal: #00b2a9;
  --teal-dark: #00908a;
  --teal-soft: #e5f7f6;
  --navy: #041e42;
  --navy-2: #0b2d5c;
  --slate: #8d99ae;
  --gray: #f4f4f4;
  --line: #e3e7ee;
  --text: #1c2737;
  --muted: #5b6678;
  --orange: #fc7a1e;
  --orange-dark: #e2650c;
  --white: #fff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(4, 30, 66, 0.08);
  --shadow-lg: 0 18px 44px rgba(4, 30, 66, 0.16);
  --max: 1200px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
}

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.3;
  color: var(--navy);
}

p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--navy);
  color: var(--white);
  border-radius: 6px;
}

.skip-link:focus {
  left: 12px;
}

:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: 10px;
  border: 1.5px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}

.btn-cta {
  background: var(--orange);
  color: var(--white);
  box-shadow: 0 8px 20px rgba(252, 122, 30, 0.28);
}

.btn-cta:hover {
  background: var(--orange-dark);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--teal);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--teal-dark);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--white);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.btn-outline {
  border-color: var(--teal);
  color: var(--teal-dark);
  background: var(--white);
}

.btn-outline:hover {
  background: var(--teal-soft);
}

.btn-sm {
  height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--teal-dark);
}

.link-more::after {
  content: "→";
  transition: transform 0.2s;
}

.link-more:hover::after {
  transform: translateX(3px);
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid transparent;
  transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 18px rgba(4, 30, 66, 0.06);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
}

.brand-mark {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--teal), var(--navy-2));
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.brand small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--slate);
  letter-spacing: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav a[aria-current="page"] {
  color: var(--teal-dark);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-login svg {
  display: inline-block;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  position: relative;
  transition: transform 0.2s, background 0.2s;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.menu-open .menu-toggle span {
  background: transparent;
}

.menu-open .menu-toggle span::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-open .menu-toggle span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: linear-gradient(125deg, var(--navy) 0%, var(--navy-2) 45%, #0a5e72 75%, var(--teal) 120%);
  background-size: 180% 180%;
  animation: hero-shift 16s ease-in-out infinite alternate;
}

@keyframes hero-shift {
  from {
    background-position: 0% 40%;
  }
  to {
    background-position: 100% 60%;
  }
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.45;
  pointer-events: none;
}

.hero::before {
  width: 420px;
  height: 420px;
  background: var(--teal);
  top: -140px;
  right: -80px;
}

.hero::after {
  width: 320px;
  height: 320px;
  background: #2b6cb0;
  bottom: -160px;
  left: -60px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 104px 0 96px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 14px;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(0, 178, 169, 0.3);
}

.hero h1 {
  color: var(--white);
  font-size: clamp(30px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: 1px;
}

.hero h1 .accent {
  display: block;
  margin-top: 6px;
  background: linear-gradient(90deg, #7ff0e8, var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  max-width: 720px;
  margin: 22px auto 0;
  font-size: clamp(16px, 2.2vw, 19px);
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
}

.page-hero {
  background: linear-gradient(125deg, var(--navy) 0%, var(--navy-2) 60%, #0a5e72 100%);
  color: var(--white);
  text-align: center;
}

.page-hero .container {
  padding-top: 72px;
  padding-bottom: 64px;
}

.page-hero h1 {
  color: var(--white);
  font-size: clamp(28px, 5vw, 44px);
}

.page-hero p {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 17px;
}

/* ---------- 区块 ---------- */
.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--gray);
}

.section-head {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
}

.section-head h2 {
  font-size: clamp(24px, 4vw, 36px);
}

.section-head p {
  margin-top: 12px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 24px;
}

.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 {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

a.card:hover,
.card.hoverable:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 178, 169, 0.45);
}

.card h3 {
  font-size: 19px;
}

.card p {
  color: var(--muted);
  font-size: 15px;
}

.icon {
  display: inline-flex;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  background: var(--teal-soft);
  color: var(--teal-dark);
}

.icon svg {
  width: 26px;
  height: 26px;
}

.icon-navy {
  background: rgba(4, 30, 66, 0.07);
  color: var(--navy);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.tags span {
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--gray);
  color: var(--muted);
  font-size: 13px;
}

.card .card-foot {
  margin-top: auto;
  padding-top: 8px;
}

/* ---------- 产品亮点轮播 ---------- */
.slider {
  position: relative;
}

.slides {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding: 4px 4px 12px;
}

.slides::-webkit-scrollbar {
  display: none;
}

.slide {
  flex: 0 0 calc((100% - 48px) / 3);
  scroll-snap-align: start;
}

.slide-visual {
  height: 160px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--teal) 140%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.92);
}

.slide-visual svg {
  width: 64px;
  height: 64px;
}

.slider-nav {
  display: none;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.slider-nav button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--navy);
  font-size: 18px;
  cursor: pointer;
}

.slider-nav button:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

/* ---------- 场景卡片 ---------- */
.scene-card {
  overflow: hidden;
  padding: 0;
}

.scene-card .scene-top {
  padding: 26px 26px 18px;
  background: linear-gradient(135deg, var(--teal-soft), #f7fbfd);
}

.scene-card .scene-body {
  padding: 0 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

a.scene-card:hover {
  transform: scale(1.02);
}

.scene-role {
  font-size: 13px;
  color: var(--teal-dark);
  font-weight: 600;
}

/* ---------- 能力数据 ---------- */
.stats {
  background: var(--navy);
  color: var(--white);
}

.stats .grid {
  text-align: center;
}

.stat-num {
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
}

.stat-num .unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--teal);
}

.stat-label {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
}

.stats-note {
  margin-top: 28px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 关于简介 ---------- */
.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split h2 {
  font-size: clamp(24px, 4vw, 34px);
}

.split p {
  margin-top: 16px;
  color: var(--muted);
}

.check-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300908a' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center / 12px no-repeat;
}

.visual-panel {
  position: relative;
  border-radius: 20px;
  padding: 32px;
  background: linear-gradient(145deg, var(--navy) 0%, var(--navy-2) 60%, #0a5e72 100%);
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.visual-panel .vp-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.visual-panel .vp-row + .vp-row {
  margin-top: 12px;
}

.visual-panel .vp-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
}

.visual-panel .vp-row strong {
  display: block;
  font-size: 15px;
}

.visual-panel .vp-row span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 功能详情（产品页） ---------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.feature:last-child {
  border-bottom: 0;
}

.feature.reverse .feature-visual {
  order: -1;
}

.feature h3 {
  font-size: clamp(22px, 3vw, 28px);
}

.feature p {
  margin-top: 12px;
  color: var(--muted);
}

.feature .scene-line {
  margin-top: 14px;
  padding: 12px 16px;
  border-left: 3px solid var(--teal);
  background: var(--gray);
  border-radius: 0 10px 10px 0;
  font-size: 15px;
  color: var(--text);
}

.feature .btn {
  margin-top: 22px;
}

.feature-visual {
  border-radius: 18px;
  padding: 28px;
  background: linear-gradient(160deg, #f7fbfd, var(--teal-soft));
  border: 1px solid var(--line);
}

.mock {
  border-radius: 12px;
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mock-bar {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--navy);
}

.mock-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
}

.mock-body {
  padding: 16px;
  display: grid;
  gap: 10px;
}

.mock-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--gray);
  font-size: 14px;
}

.mock-line b {
  font-weight: 600;
  color: var(--navy);
}

.pill {
  flex-shrink: 0;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--teal-soft);
  color: var(--teal-dark);
}

.pill.warn {
  background: #fff1e6;
  color: var(--orange-dark);
}

.pill.muted {
  background: #eceff4;
  color: var(--muted);
}

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

.timeline .card::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: var(--teal);
  color: var(--white);
  font-weight: 700;
}

.arch {
  display: grid;
  gap: 12px;
  max-width: 880px;
  margin: 0 auto;
}

.arch-layer {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
  align-items: stretch;
}

.arch-layer > strong {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--navy);
  color: var(--white);
  font-size: 15px;
  text-align: center;
  padding: 10px;
}

.arch-layer > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px;
  border-radius: 10px;
  background: var(--white);
  border: 1px dashed rgba(0, 178, 169, 0.5);
}

.arch-layer > div span {
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--teal-soft);
  color: var(--teal-dark);
  font-size: 14px;
}

/* ---------- 解决方案 ---------- */
.scene-detail {
  scroll-margin-top: 90px;
}

.scene-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.scene-columns .card h4 {
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scene-columns ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 15px;
  display: grid;
  gap: 6px;
}

.compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--white);
}

.compare th,
.compare td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.compare thead th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}

.compare tbody tr:last-child td {
  border-bottom: 0;
}

.compare td:first-child {
  font-weight: 600;
  color: var(--navy);
  white-space: nowrap;
}

.compare td:nth-child(2) {
  color: var(--muted);
}

.compare td:nth-child(3) {
  color: var(--teal-dark);
  font-weight: 600;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 55%, #0a5e72 100%);
  color: var(--white);
  text-align: center;
}

.cta-band h2 {
  color: var(--white);
  font-size: clamp(22px, 4vw, 32px);
}

.cta-band p {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.8);
}

.cta-band .btn {
  margin-top: 26px;
}

/* ---------- 表单 ---------- */
.form-card {
  padding: 32px;
  border-radius: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field.full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
}

.field label .req {
  color: var(--orange-dark);
  margin-left: 2px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field textarea {
  min-height: 110px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(0, 178, 169, 0.14);
}

.field.invalid input,
.field.invalid select,
.field.invalid textarea {
  border-color: #d64545;
}

.field .err {
  min-height: 18px;
  font-size: 13px;
  color: #d64545;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
}

.form-note {
  font-size: 13px;
  color: var(--muted);
}

.form-success {
  display: none;
  padding: 28px;
  border-radius: 14px;
  background: var(--teal-soft);
  border: 1px solid rgba(0, 178, 169, 0.35);
  text-align: center;
}

.form-success h3 {
  color: var(--teal-dark);
}

.form-success p {
  margin-top: 8px;
  color: var(--text);
}

.form-done .form-body {
  display: none;
}

.form-done .form-success {
  display: block;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---------- 联系方式 ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  align-items: start;
}

.contact-items {
  display: grid;
  gap: 16px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
}

.contact-item h4 {
  font-size: 16px;
}

.contact-item a,
.contact-item strong {
  display: block;
  margin-top: 2px;
  font-size: 17px;
  font-weight: 700;
  color: var(--teal-dark);
  word-break: break-all;
}

.contact-item p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq details {
  border-radius: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 4px 20px;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 0;
  font-weight: 600;
  color: var(--navy);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

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

.faq summary::after {
  content: "+";
  color: var(--teal-dark);
  font-size: 20px;
  line-height: 1;
  transition: transform 0.2s;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details p {
  padding: 0 0 16px;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #03162f;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 32px;
  padding: 56px 0 40px;
}

.site-footer h4 {
  color: var(--white);
  font-size: 15px;
  margin-bottom: 14px;
}

.site-footer .brand {
  color: var(--white);
}

.site-footer .brand small {
  color: rgba(255, 255, 255, 0.5);
}

.site-footer p {
  margin-top: 14px;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-links a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 18px 0 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a:hover {
  color: var(--white);
  text-decoration: underline;
}

/* ---------- 滚动淡入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .slide {
    flex-basis: calc((100% - 24px) / 2);
  }

  .slider-nav {
    display: flex;
  }

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

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

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .menu-open .nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    padding: 10px 16px 18px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(4, 30, 66, 0.08);
  }

  .menu-open .nav a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--gray);
  }

  .menu-open .nav a::after {
    display: none;
  }


  .grid-2,
  .grid-3,
  .split,
  .feature,
  .contact-layout,
  .scene-columns {
    grid-template-columns: 1fr;
  }

  .feature.reverse .feature-visual {
    order: 0;
  }

  .split {
    gap: 32px;
  }

  .section {
    padding: 64px 0;
  }

  .arch-layer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .grid-4,
  .timeline,
  .form-grid,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .slide {
    flex-basis: 86%;
  }

  .hero-inner {
    padding: 72px 0 64px;
  }

  /* 手机：右上角保留「登录」+ 菜单；预约演示入口在首屏与各页底部 */
  .header-actions .btn-cta {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .form-card {
    padding: 22px;
  }

  .card {
    padding: 22px;
  }
}


/* ---------- 一课一档改版（2026-10）：两大层卡片 / 政策引文 / 对照表 ---------- */
/* 锚点跳转避开吸顶页头 */
[id] {
  scroll-margin-top: 84px;
}

/* 滚动淡入元素入场前下移 18px，锚点落位时补偿 */
.reveal[id] {
  scroll-margin-top: 102px;
}

/* 导航 6 项：中等宽度收紧间距，避免与右侧按钮挤压 */
@media (max-width: 1100px) and (min-width: 861px) {
  .nav {
    gap: 0;
  }

  .nav a {
    padding: 8px 9px;
    font-size: 14px;
  }

  .nav a::after {
    left: 9px;
    right: 9px;
  }
}

/* 两大层卡片（首页）：信息化 / 数字化 */
.layer-card {
  padding: 0;
  gap: 0;
  overflow: hidden;
}

.layer-card .layer-top {
  padding: 28px 28px 24px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 60%, #0a5e72 100%);
  color: var(--white);
}

.layer-card.digital .layer-top {
  background: linear-gradient(135deg, #0a5e72 0%, var(--teal-dark) 55%, var(--teal) 120%);
}

.layer-card .layer-tag {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.72);
}

.layer-card .layer-top h3 {
  margin-top: 6px;
  color: var(--white);
  font-size: clamp(22px, 3vw, 26px);
}

.layer-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.layer-keys span {
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-size: 14px;
  font-weight: 600;
}

.layer-card .layer-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 28px 28px;
}

.layer-card .layer-body .check-list {
  margin-top: 4px;
  font-size: 15px;
}

.layer-card .card-foot {
  margin-top: auto;
  padding-top: 8px;
}

/* 分组卡片（专题页）：收得全 / 审得严 … */
.group-card .group-key {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 10px;
}

.group-card .group-key strong {
  font-size: 22px;
  color: var(--navy);
}

.group-card .group-key span {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--teal-dark);
}

.group-card .check-list {
  margin-top: 4px;
  gap: 8px;
  font-size: 15px;
  color: var(--muted);
}

/* 趋势卡片（专题页「必答题」） */
.trend-card .trend-no {
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  color: var(--teal);
}

.trend-card .trend-meaning {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--text);
  font-size: 15px;
}

/* 政策引文卡片 */
.policy-card {
  gap: 14px;
}

.policy-card .policy-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.policy-card .policy-type {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--teal-dark);
}

.policy-doc {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 6px;
  background: rgba(4, 30, 66, 0.07);
  color: var(--navy);
  font-size: 12px;
  font-weight: 600;
}

.policy-quote {
  margin: 0;
  padding: 12px 16px;
  border-left: 3px solid var(--teal);
  border-radius: 0 10px 10px 0;
  background: var(--gray);
  color: var(--text);
  font-size: 15px;
}

.policy-quote cite {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 12px;
  color: var(--muted);
}

.policy-card .policy-meaning {
  color: var(--muted);
  font-size: 15px;
}

.policy-card .policy-meaning strong {
  color: var(--navy);
}

/* 对照表：两列版本第二列强调；单元格内层级标签 */
.compare.compare-2 td:nth-child(2) {
  color: var(--teal-dark);
  font-weight: 600;
}

.compare .pill {
  margin-left: 8px;
  vertical-align: 1px;
}

/* 数字化板块加注 */
.layer-note {
  margin-top: 28px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

/* 延伸方向提示条（首页） */
.extend-line {
  margin-top: 28px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}

.pill.navy {
  background: rgba(4, 30, 66, 0.08);
  color: var(--navy);
}

/* 首屏左右留白：.hero-inner 的 padding 简写会把 .container 左右内边距置 0，窄屏文字贴边 */
.hero-inner {
  padding-left: 20px;
  padding-right: 20px;
}

@media (max-width: 640px) {
  .hero-inner {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* 标题均衡换行，避免单字孤行 */
.hero h1,
.page-hero h1,
.section-head h2,
.split h2 {
  text-wrap: balance;
}

/* 浅灰底区块内的标签改白底，避免与背景同色 */
.section-alt .tags span {
  background: var(--white);
  border: 1px solid var(--line);
}