/* ═══════════════════════════════════════════════
   小艾电竞 — 电光霓虹 · 浅灰梦境
   燃梦无畏 · 专属设计系统
   ═══════════════════════════════════════════════ */

/* ── CSS 变量 ── */
:root {
  --color-bg: #fafaf8;
  --color-bg-alt: #f4f1f8;
  --color-surface: #ffffff;
  --color-border: #e8e4ef;
  --color-border-strong: #d5cfe2;
  --color-text: #2d1b55;
  --color-text-secondary: #5c4d7a;
  --color-text-muted: #8a7da0;
  --color-electric-violet: #7c3aed;
  --color-neon-pink: #ec4899;
  --color-cyan-spark: #06b6d4;
  --color-amber-glow: #f59e0b;
  --color-gradient-primary: linear-gradient(135deg, #7c3aed 0%, #a855f7 30%, #ec4899 70%, #f472b6 100%);
  --color-gradient-cyan: linear-gradient(135deg, #06b6d4 0%, #22d3ee 50%, #67e8f9 100%);
  --color-gradient-warm: linear-gradient(135deg, #ec4899 0%, #f472b6 40%, #f59e0b 100%);
  --shadow-sm: 0 1px 3px rgba(124, 58, 237, 0.06), 0 1px 2px rgba(124, 58, 237, 0.04);
  --shadow-md: 0 4px 20px rgba(124, 58, 237, 0.08), 0 2px 8px rgba(236, 72, 153, 0.06);
  --shadow-lg: 0 12px 40px rgba(124, 58, 237, 0.12), 0 4px 16px rgba(236, 72, 153, 0.08);
  --shadow-glow-violet: 0 0 40px rgba(124, 58, 237, 0.18), 0 0 80px rgba(124, 58, 237, 0.08);
  --shadow-glow-pink: 0 0 40px rgba(236, 72, 153, 0.18), 0 0 80px rgba(236, 72, 153, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  position: relative;
}

/* ── 柔和背景光斑 ── */
body::before {
  content: '';
  position: fixed;
  top: -30%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  animation: floatGlow 18s ease-in-out infinite;
}

body::after {
  content: '';
  position: fixed;
  bottom: -25%;
  left: -15%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  animation: floatGlow 22s ease-in-out infinite reverse;
}

@keyframes floatGlow {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(40px, -30px) scale(1.08);
  }
  50% {
    transform: translate(-20px, 20px) scale(0.94);
  }
  75% {
    transform: translate(-35px, -15px) scale(1.05);
  }
}

/* ── 文字选择 ── */
::selection {
  background: rgba(124, 58, 237, 0.2);
  color: var(--color-text);
}

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

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--color-bg-alt);
}

/* ── 导航 — 固定顶部 ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.3px;
  transition: var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--color-gradient-primary);
  color: #fff;
  font-weight: 900;
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.3);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: var(--color-gradient-primary);
  z-index: -1;
  opacity: 0.5;
  filter: blur(6px);
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(1.06);
  }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.main-nav li {
  position: relative;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  position: relative;
  letter-spacing: -0.1px;
}

.main-nav a:hover {
  color: var(--color-electric-violet);
  background: rgba(124, 58, 237, 0.06);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-gradient-primary);
  border-radius: 2px;
  transition: transform var(--transition-bounce);
}

.main-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  padding: 9px 22px !important;
  border-radius: var(--radius-md) !important;
  color: #fff !important;
  font-weight: 700 !important;
  background: var(--color-gradient-primary);
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.3);
  transition: var(--transition-bounce) !important;
  letter-spacing: 0.2px !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.4);
  color: #fff !important;
  background: var(--color-gradient-warm) !important;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: transparent;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 3px;
  transition: var(--transition-smooth);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ── 首页 Hero ── */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 24px;
  margin-bottom: 20px;
  background: rgba(236, 72, 153, 0.1);
  color: var(--color-neon-pink);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: 1px solid rgba(236, 72, 153, 0.2);
}

.hero h1 {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 900;
  letter-spacing: -0.8px;
  color: var(--color-text);
  background: var(--color-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 32px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-smooth);
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: calc(var(--radius-lg) + 3px);
  background: var(--color-gradient-primary);
  z-index: -1;
  opacity: 0.5;
  filter: blur(20px);
  transition: var(--transition-smooth);
}

.hero-image:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-violet), var(--shadow-lg);
}

.hero-image:hover::before {
  opacity: 0.7;
  filter: blur(28px);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
}

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: var(--radius-md);
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition-bounce);
  font-size: 0.95rem;
  letter-spacing: 0.1px;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  color: #fff;
  background: var(--color-gradient-primary);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.45);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-electric-violet);
  color: var(--color-electric-violet);
  font-weight: 700;
}

.btn-outline:hover {
  background: rgba(124, 58, 237, 0.06);
  border-color: var(--color-neon-pink);
  color: var(--color-neon-pink);
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.15);
}

/* ── 标签 / 标题 ── */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--color-cyan-spark);
  text-transform: uppercase;
  position: relative;
  padding-left: 22px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--color-gradient-cyan);
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 16px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--color-text);
  line-height: 1.2;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 44px;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ── 卡片网格 ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
  border-radius: 0 0 3px 3px;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: rgba(124, 58, 237, 0.08);
  color: var(--color-electric-violet);
  transition: var(--transition-smooth);
}

.category-card:hover .card-icon {
  background: var(--color-gradient-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--color-electric-violet);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.card-link:hover {
  color: var(--color-neon-pink);
  gap: 8px;
}

/* ── 特性块 ── */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

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

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 3px solid transparent;
  background: var(--color-gradient-primary) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.feature-text p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition-fast);
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  color: #fff;
  background: var(--color-gradient-cyan);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

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

.stat-item {
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 3px;
  background: var(--color-gradient-primary);
  border-radius: 3px 3px 0 0;
  transition: transform var(--transition-bounce);
}

.stat-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.stat-item:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: var(--color-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-top: 8px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ── 内容墙 ── */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 20px;
}

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-text);
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.content-wall-body .card-link {
  margin-top: 10px;
}

/* ── FAQ ── */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-surface);
  transition: var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-electric-violet);
  transition: transform var(--transition-bounce);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: all var(--transition-smooth);
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open {
  border-color: var(--color-electric-violet);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.06);
}

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

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item.open .faq-answer {
  display: block;
  opacity: 0.75;
  transform: translateY(0);
}

/* ── CTA 横幅 ── */
.cta-banner {
  padding: 60px 24px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background: var(--color-gradient-primary);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow-violet);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -15%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.4px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  margin: 14px 0 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-electric-violet);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  color: var(--color-neon-pink);
}

/* ── 页脚 ── */
.site-footer {
  padding: 56px 0 28px;
  background: #f0ecf6;
  border-top: 1px solid var(--color-border-strong);
  color: var(--color-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 10px;
}

.footer-brand .logo {
  margin-bottom: 6px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
  letter-spacing: -0.2px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--color-electric-violet);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border-strong);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ── 工具类 ── */
.text-accent {
  color: var(--color-electric-violet);
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--color-text-secondary);
  line-height: 1.7;
  text-align: center;
}

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

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

/* ── 隐藏类 ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ═══════════════════════════════════════════════
   响应式设计
   ═══════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.4rem;
  }

  .hero .container {
    gap: 32px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-top: 90px;
    padding-bottom: 40px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .hero-content {
    order: 2;
    max-width: 100%;
  }

  .hero p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    order: 1;
    max-width: 420px;
    margin: 0 auto;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-image {
    max-width: 500px;
    margin: 0 auto;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    flex-direction: column;
    gap: 4px;
    border-bottom: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 14px 18px;
    font-size: 1rem;
    width: 100%;
    border-radius: var(--radius-sm);
  }

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

  .menu-toggle {
    display: flex;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .footer-brand {
    grid-column: 1;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

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

  .hero h1 {
    font-size: 1.7rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-eyebrow {
    font-size: 0.72rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-desc {
    font-size: 0.9rem;
    margin-bottom: 28px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .cta-banner {
    padding: 40px 16px;
    border-radius: var(--radius-lg);
  }

  .cta-banner h2 {
    font-size: 1.3rem;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .category-card {
    padding: 22px 18px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
  }

  .faq-item .faq-question {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .faq-item .faq-answer {
    padding: 0 16px 14px;
    font-size: 0.85rem;
  }
}

/* ── 打印样式 ── */
@media print {
  .site-header,
  .menu-toggle,
  .cta-banner,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 20px 0;
  }
}