```css
/* ============================================
   ✦ 光之书页 · LUMINA HEAVEN PORTAL ✦
   入此一瞬 · 即见天堂
   Design System v1.0 — Awwwards Level
   ============================================ */

/* ---------- Design Tokens ---------- */
:root {
  --paper: #FDFBF7;
  --paper-2: #F6F2EC;
  --ink: #1E1B2E;
  --primary: #FF4D6D;
  --primary-soft: rgba(255, 77, 109, 0.1);
  --gold: #FFC531;
  --gold-soft: rgba(255, 197, 49, 0.18);
  --teal: #00BFA6;
  --teal-soft: rgba(0, 191, 166, 0.1);
  --lilac: #A78BFA;
  --lilac-soft: rgba(167, 139, 250, 0.1);
  --sky: #60A5FA;
  --muted: rgba(30, 27, 46, 0.65);
  --light-muted: rgba(30, 27, 46, 0.42);
  --border: rgba(30, 27, 46, 0.07);
  --card-border: rgba(30, 27, 46, 0.05);
  --shadow-sm: 0 2px 12px rgba(30, 27, 46, 0.04);
  --shadow-md: 0 12px 40px rgba(30, 27, 46, 0.06);
  --shadow-lg: 0 24px 64px rgba(30, 27, 46, 0.08);
  --shadow-primary: 0 12px 32px rgba(255, 77, 109, 0.25);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-full: 999px;
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 50%, rgba(30, 27, 46, 0.018) 1px, transparent 1.5px),
    radial-gradient(ellipse 60% 40% at 85% 10%, rgba(255, 77, 109, 0.055), transparent),
    radial-gradient(ellipse 50% 40% at 10% 60%, rgba(0, 191, 166, 0.05), transparent),
    radial-gradient(ellipse 50% 50% at 50% 100%, rgba(255, 197, 49, 0.045), transparent),
    var(--paper);
  background-size: 28px 28px, 100% 100%, 100% 100%, 100% 100%;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--primary);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--paper);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--gold));
  border-radius: 12px;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  color: var(--ink);
  font-weight: 800;
}

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

a {
  color: inherit;
}

/* ---------- 核心布局 ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section:nth-child(even) {
  background:
    radial-gradient(circle at 20% 30%, rgba(167, 139, 250, 0.05), transparent 50%),
    #F6F2EC;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.82);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border-bottom: 1px solid rgba(30, 27, 46, 0.05);
  transition: box-shadow 0.3s ease;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold), var(--teal), var(--lilac));
  z-index: 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
  transition: opacity 0.2s ease;
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: linear-gradient(135deg, var(--primary), var(--gold));
  color: #fff;
  transform: rotate(-8deg);
  box-shadow:
    0 0 20px rgba(255, 77, 109, 0.3),
    0 4px 16px rgba(255, 77, 109, 0.25);
  transition: transform 0.3s var(--ease);
}

.logo:hover .logo-icon {
  transform: rotate(0deg) scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  position: relative;
  transition: color 0.25s ease;
  padding: 4px 0;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  transition: width 0.35s var(--ease);
}

.main-nav a:not(.nav-cta):hover {
  color: var(--ink);
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 26px;
  border-radius: var(--radius-full);
  color: #fff !important;
  background: var(--ink);
  font-weight: 700 !important;
  box-shadow: 0 4px 16px rgba(30, 27, 46, 0.18);
  transition: all 0.3s var(--ease) !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  background: var(--primary);
  box-shadow: 0 8px 24px rgba(255, 77, 109, 0.3);
}

.nav-cta::after {
  display: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  color: var(--ink);
  transition: all 0.2s ease;
}

.menu-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ---------- 首页 Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  gap: 64px;
  flex-wrap: wrap;
  padding: 140px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 77, 109, 0.1), transparent 60%);
  z-index: 0;
  animation: halo 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -140px;
  left: -100px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(167, 139, 250, 0.1), transparent 60%);
  z-index: 0;
  animation: halo 10s ease-in-out infinite reverse;
}

.hero-content {
  max-width: 720px;
  flex: 1 1 460px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  background: var(--gold-soft);
  border: 1.5px dashed rgba(255, 197, 49, 0.5);
  color: #8A6A00;
  position: relative;
}

.hero-eyebrow::before {
  content: '✦';
  font-size: 0.9rem;
}

.hero h1 {
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 24px;
  color: var(--ink);
  position: relative;
  display: inline-block;
}

.hero h1::after {
  content: '';
  position: absolute;
  left: 4px;
  bottom: 8px;
  width: 102%;
  height: 16px;
  background: linear-gradient(90deg, rgba(255, 77, 109, 0.14), rgba(255, 197, 49, 0.14));
  border-radius: 4px;
  z-index: -1;
}

.hero p {
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  flex: 1 1 380px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  z-index: 2;
  box-shadow:
    0 24px 80px rgba(255, 77, 109, 0.14),
    0 4px 24px rgba(30, 27, 46, 0.06);
  transition: all 0.4s var(--ease);
}

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.08), transparent 40%, transparent 70%, rgba(0, 191, 166, 0.06));
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s var(--ease);
}

.hero-image:hover img {
  transform: scale(1.03);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all 0.35s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #FF735C);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(255, 77, 109, 0.35);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--ink);
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--primary);
  position: relative;
  padding-left: 32px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 22px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  transform: translateY(-50%);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.9rem, 3.5vw, 2.7rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 16px;
  color: var(--ink);
  position: relative;
}

.section-desc {
  max-width: 620px;
  color: var(--muted);
  opacity: 1;
  font-size: 1.03rem;
  line-height: 1.8;
  margin-bottom: 48px;
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: var(--radius-md);
  padding: 30px 26px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all 0.4s var(--ease);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--primary-soft);
  filter: blur(20px);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 77, 109, 0.12);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-card:hover::after {
  opacity: 1;
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--primary-soft), var(--gold-soft));
  border: 1px solid rgba(255, 77, 109, 0.12);
  position: relative;
  z-index: 1;
  transition: all 0.3s var(--ease);
}

.category-card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
  box-shadow: 0 4px 16px rgba(255, 77, 109, 0.15);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  position: relative;
  z-index: 1;
  transition: gap 0.3s var(--ease);
}

.card-link::after {
  content: '✦';
  font-size: 0.75rem;
  opacity: 0;
  transform: translateX(-6px);
  transition: all 0.3s var(--ease);
}

.card-link:hover {
  gap: 10px;
}

.card-link:hover::after {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- 特性块 ---------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-md);
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, rgba(255, 77, 109, 0.06), transparent 50%, rgba(0, 191, 166, 0.05));
  border-radius: var(--radius-lg);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s var(--ease);
}

.feature-image:hover img {
  transform: scale(1.02);
}

.feature-text {
  padding: 20px 0;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 500;
  color: var(--ink);
  font-size: 1rem;
  border-bottom: 1px dashed var(--border);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--teal);
  flex-shrink: 0;
  text-shadow: 0 0 12px rgba(0, 191, 166, 0.3);
}

/* ---------- 数据条 ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s var(--ease);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20%;
  width: 60%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold), var(--teal));
  border-radius: 4px;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, var(--primary), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 8px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

/* ---------- 内容墙 ---------- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.4s var(--ease);
}

.content-wall-item:nth-child(3n + 2) {
  transform: rotate(0.7deg);
}

.content-wall-item:nth-child(3n) {
  transform: rotate(-0.5deg);
}

.content-wall-item:hover {
  transform: rotate(0deg) translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 77, 109, 0.12);
}

.content-wall-item::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--paper) transparent transparent;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.content-wall-item:hover::after {
  opacity: 1;
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease);
}

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body {
  padding: 22px 22px 24px;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s var(--ease);
}

.faq-item:hover {
  border-color: rgba(255, 77, 109, 0.15);
  box-shadow: var(--shadow-md);
}

.faq-item:not(.open):hover .faq-question::after {
  transform: rotate(90deg);
}

.faq-item .faq-question {
  padding: 22px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
  gap: 16px;
  user-select: none;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.4s var(--ease);
}

.faq-item.open {
  border-color: rgba(255, 77, 109, 0.25);
}

.faq-item.open .faq-question {
  color: var(--primary);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
  color: var(--gold);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--muted);
  line-height: 1.8;
  font-size: 0.93rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeDown 0.3s var(--ease);
}

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary) 0%, #FF735C 50%, var(--gold) 100%);
  position: relative;
  overflow: hidden;
  color: #fff;
  box-shadow: 0 24px 80px rgba(255, 77, 109, 0.28);
}

.cta-banner::before,
.cta-banner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner::before {
  width: 240px;
  height: 240px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  top: -90px;
  right: -70px;
}

.cta-banner::after {
  width: 160px;
  height: 160px;
  bottom: -60px;
  left: -40px;
  background: rgba(255, 255, 255, 0.08);
  border: 2px dashed rgba(255, 255, 255, 0.2);
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(30, 27, 46, 0.15);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(30, 27, 46, 0.2);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 72px 0 32px;
  background: var(--paper-2);
  border-top: 1px solid var(--border);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold), var(--teal), var(--lilac));
  z-index: 1;
}

.site-footer .container {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

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

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 14px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 2px;
}

.footer-col a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 3px 0;
  transition: all 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--light-muted);
}

/* ---------- 工具类 ---------- */
.text-accent {
  color: var(--primary);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--muted);
  text-align: center;
  line-height: 1.9;
  font-size: 1rem;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* ---------- 动画 ---------- */
@keyframes halo {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.85;
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(253, 251, 247, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 28px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    align-items: stretch;
    box-shadow: 0 24px 48px rgba(30, 27, 46, 0.08);
    animation: fadeDown 0.3s var(--ease);
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 8px 0;
  }

  .main-nav.open a:not(.nav-cta)::after {
    display: none;
  }

  .nav-cta {
    text-align: center;
    margin-top: 8px;
  }

  .hero {
    padding: 120px 0 72px;
    min-height: auto;
  }

  .hero-content {
    flex-basis: 100%;
  }

  .hero-image {
    flex-basis: 100%;
  }

  .section {
    padding: 72px 0;
  }

  .cta-banner {
    padding: 56px 28px;
  }

  .cta-banner::before,
  .cta-banner::after {
    opacity: 0.5;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
    width: 100%;
  }

  .hero {
    padding-top: 110px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .faq-item .faq-question {
    font-size: 0.95rem;
    padding: 18px;
  }

  .faq-item .faq-answer {
    padding: 0 18px 16px;
  }

  .feature-block {
    gap: 32px;
  }

  .site-header .logo span {
    font-size: 1.05rem;
  }
}