/* =====================================================
   看片网站在线观看 · "EDITORIAL CINEMA" Design System
   温暖纸感 + 珊瑚红 × 墨绿 · 杂志化排版 · 电影胶片肌理
   ===================================================== */

:root {
  /* ── 暖色纸感色板 ── */
  --paper: #FBF6EE;
  --paper-deep: #F3EBDF;
  --coral: #FF5A36;
  --coral-soft: rgba(255, 90, 54, 0.12);
  --coral-dark: #E7431F;
  --teal: #0E8B7A;
  --teal-soft: rgba(14, 139, 122, 0.10);
  --teal-dark: #0B6C5F;
  --ink: #201E1A;
  --ink-soft: #5C5548;
  --ink-faint: #938A7B;
  --line: #E9E0D4;
  --white: #FFFFFF;

  /* ── 动效与圆角 ── */
  --shadow-sm: 0 2px 10px rgba(32, 30, 26, 0.05);
  --shadow-md: 0 10px 28px rgba(32, 30, 26, 0.08);
  --shadow-lg: 0 24px 48px rgba(32, 30, 26, 0.12);
  --shadow-coral: 0 6px 20px rgba(255, 90, 54, 0.28);
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 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-color: var(--paper);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(255, 90, 54, 0.05) 0%, transparent 30%),
    radial-gradient(circle at 85% 30%, rgba(14, 139, 122, 0.04) 0%, transparent 25%),
    radial-gradient(circle at 50% 90%, rgba(255, 90, 54, 0.03) 0%, transparent 30%);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

::selection {
  background: var(--coral);
  color: var(--white);
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--ink-faint); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--coral); }

/* ── 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: var(--paper-deep);
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 4px;
  background: repeating-linear-gradient(
    to right,
    var(--coral) 0 6px,
    transparent 6px 16px
  );
  opacity: 0.35;
  border-radius: 2px;
}

/* ── 导航 ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251, 246, 238, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s var(--ease);
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(
    to right,
    var(--coral) 0 10px,
    transparent 10px 24px
  );
  opacity: 0.4;
}

.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: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}

.logo:hover { opacity: 0.85; }

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: var(--coral);
  color: var(--white);
  box-shadow: var(--shadow-coral);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 16px;
  border: 1px solid rgba(255, 90, 54, 0.3);
  animation: logoPulse 2.4s ease-out infinite;
}

@keyframes logoPulse {
  0% { transform: scale(1); opacity: 1; }
  80%, 100% { transform: scale(1.5); opacity: 0; }
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.02em;
  transition: color 0.25s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--coral);
  border-radius: 2px;
  transition: width 0.3s var(--ease);
}

.main-nav a:hover {
  color: var(--coral);
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 100px;
  background: var(--coral);
  color: var(--white) !important;
  font-weight: 600;
  box-shadow: var(--shadow-coral);
  transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s;
}

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

.nav-cta:hover {
  background: var(--coral-dark);
  color: var(--white) !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 90, 54, 0.35);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  position: relative;
}

.menu-toggle::before,
.menu-toggle::after {
  content: '';
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: top 0.3s, transform 0.3s, opacity 0.3s;
}

.menu-toggle::before { top: 16px; }
.menu-toggle::after { bottom: 16px; }

/* ── Hero ── */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 60px;
  position: relative;
  padding: 140px 24px 100px;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

/* 胶片齿孔装饰线条 */
.hero::before {
  content: '';
  position: absolute;
  top: 84px;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    to right,
    rgba(255, 90, 54, 0.55) 0 6px,
    rgba(255, 90, 54, 0.15) 6px 18px
  );
  opacity: 0.35;
}

.hero-content {
  flex: 1 1 480px;
  max-width: 720px;
  animation: fadeUp 0.8s var(--ease) backwards;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--coral-soft);
  color: var(--coral);
  border: 1px solid rgba(255, 90, 54, 0.2);
  margin-bottom: 20px;
}

.hero-eyebrow::before {
  content: '▶';
  font-size: 0.55rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(115deg, var(--ink) 40%, var(--ink) 65%, var(--coral) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-wrap: balance;
}

.hero p {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 36px;
  border-left: 3px solid var(--teal);
  padding-left: 18px;
}

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

/* 拍立得风格 Hero 图片 */
.hero-image {
  flex: 1 1 380px;
  max-width: 520px;
  position: relative;
  background: var(--white);
  padding: 10px 10px 48px;
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  animation: fadeUp 0.8s var(--ease) 0.15s backwards;
}

.hero-image:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 32px 64px rgba(32, 30, 26, 0.15);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
  filter: sepia(0.2) saturate(0.9) contrast(1.04);
  background: linear-gradient(135deg, #EAD9C3, #C4A77D);
}

/* Hero 播放按钮 */
.hero-image::before {
  content: '';
  position: absolute;
  top: calc(50% - 24px);
  left: calc(50% - 5px);
  transform: translate(-50%, -50%);
  width: 68px;
  height: 68px;
  background: rgba(255, 90, 54, 0.92);
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 8px 24px rgba(255, 90, 54, 0.45);
  backdrop-filter: blur(4px);
  transition: transform 0.3s var(--ease), background 0.3s;
}

.hero-image::after {
  content: '';
  position: absolute;
  top: calc(50% - 24px);
  left: calc(50% - 5px);
  transform: translate(-38%, -50%);
  border-left: 20px solid var(--white);
  border-top: 13px solid transparent;
  border-bottom: 13px solid transparent;
  z-index: 3;
  transition: transform 0.3s var(--ease);
}

.hero-image:hover::before {
  transform: translate(-50%, -50%) scale(1.12);
  background: var(--coral-dark);
}

.hero-image:hover::after {
  transform: translate(-38%, -50%) scale(1.12);
}

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s var(--ease);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--coral);
  color: var(--white);
  box-shadow: var(--shadow-coral);
}

.btn-primary:hover {
  background: var(--coral-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 90, 54, 0.38);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--teal);
  color: var(--teal);
}

.btn-outline:hover {
  background: var(--teal);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14, 139, 122, 0.25);
}

/* ── 章节标签与标题 ── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 7px 18px;
  border-radius: 100px;
  background: var(--coral-soft);
  color: var(--coral);
  border: 1px solid rgba(255, 90, 54, 0.18);
  margin-bottom: 14px;
}

.section-label::before {
  content: '✦';
  font-size: 0.6rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  position: relative;
  line-height: 1.2;
}

.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), transparent);
  border-radius: 2px;
  margin-top: 10px;
}

.text-center .section-title::after {
  margin-left: auto;
  margin-right: auto;
  background: linear-gradient(90deg, transparent, var(--coral), transparent);
}

.section-desc {
  max-width: 620px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 44px;
  font-size: 1.02rem;
}

.text-center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

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

.category-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.3s;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--teal));
  opacity: 0;
  transition: opacity 0.35s;
}

.category-card::after {
  content: '▶';
  position: absolute;
  bottom: 20px;
  right: 24px;
  font-size: 0.7rem;
  color: var(--coral);
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.35s var(--ease);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 90, 54, 0.3);
}

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

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--coral-soft);
  color: var(--coral);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.55rem;
  margin-bottom: 18px;
  box-shadow: inset 0 0 0 1px rgba(255, 90, 54, 0.12);
  transition: background 0.3s, color 0.3s;
}

.category-card:hover .card-icon {
  background: var(--coral);
  color: var(--white);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--teal);
  margin-top: 8px;
  transition: gap 0.3s var(--ease), color 0.3s;
}

.card-link:hover {
  gap: 10px;
  color: var(--coral);
}

.card-link::after {
  content: '→';
  font-size: 1.1rem;
  line-height: 1;
}

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

.feature-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #E8D8C0, #D4B79A);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
  transition: transform 0.6s var(--ease);
}

.feature-image:hover img {
  transform: scale(1.04);
}

/* 特性装饰色块 */
.feature-image::after {
  content: '';
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 45%;
  height: 45%;
  background: repeating-linear-gradient(
    45deg,
    var(--coral) 0 4px,
    transparent 4px 14px
  );
  opacity: 0.15;
  border-radius: var(--radius);
  pointer-events: none;
}

.feature-text {
  color: var(--ink-soft);
}

.feature-text .section-title {
  margin-bottom: 16px;
}

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

.feature-list li {
  padding: 12px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-bottom: 1px dashed var(--line);
  color: var(--ink-soft);
  font-size: 0.98rem;
  transition: padding-left 0.3s var(--ease);
}

.feature-list li:hover {
  padding-left: 6px;
  color: var(--ink);
}

.feature-list li::before {
  content: '▶';
  font-weight: 700;
  color: var(--coral);
  font-size: 0.65rem;
  line-height: 1.9;
  flex-shrink: 0;
}

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

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

.stat-item {
  padding: 36px 20px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

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

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--coral);
  letter-spacing: -0.04em;
  line-height: 1;
  display: inline-block;
  position: relative;
}

.stat-number::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--teal);
  border-radius: 50%;
  margin-left: 6px;
  vertical-align: top;
  margin-top: 8px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--ink-faint);
  margin-top: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ── 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);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.3s;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(14, 139, 122, 0.25);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
  background: linear-gradient(135deg, #EFE3D4, #CBB394);
}

.content-wall-item:hover img {
  transform: scale(1.06);
}

/* 悬停播放按钮 */
.content-wall-item::before {
  content: '';
  position: absolute;
  top: 100px;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 52px;
  height: 52px;
  background: rgba(255, 90, 54, 0.92);
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 4px 16px rgba(255, 90, 54, 0.4);
  transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.content-wall-item::after {
  content: '';
  position: absolute;
  top: 100px;
  left: 50%;
  transform: translate(-37%, -50%) scale(0);
  border-left: 16px solid var(--white);
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  z-index: 3;
  transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.content-wall-item:hover::before,
.content-wall-item:hover::after {
  transform: translate(-50%, -50%) scale(1);
}

.content-wall-item:hover::after {
  transform: translate(-37%, -50%) scale(1);
}

.content-wall-body {
  padding: 20px 22px 24px;
}

.content-wall-body .card-link {
  margin-top: 12px;
}

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

.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item:hover {
  border-color: rgba(255, 90, 54, 0.3);
  box-shadow: var(--shadow-sm), 0 4px 16px rgba(255, 90, 54, 0.06);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--ink);
  font-size: 1.02rem;
  letter-spacing: 0.01em;
  transition: color 0.3s;
}

.faq-item .faq-question::after {
  content: '＋';
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--coral);
  flex-shrink: 0;
  transition: transform 0.4s var(--ease);
  line-height: 1;
}

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

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--ink-soft);
  line-height: 1.75;
  font-size: 0.95rem;
  border-top: 1px dashed var(--line);
  margin: 0 24px;
  padding-left: 0;
  padding-right: 0;
  padding-top: 16px;
  opacity: 1;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeDown 0.4s var(--ease);
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── CTA 横幅 ── */
.cta-banner {
  background: linear-gradient(135deg, var(--coral) 0%, #FF7A45 45%, var(--coral-dark) 100%);
  padding: 68px 32px;
  text-align: center;
  border-radius: 24px;
  color: var(--white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 56px rgba(255, 90, 54, 0.35);
  max-width: 1200px;
  margin: 0 auto;
}

/* 装饰圆 */
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 12%;
  width: 160px;
  height: 160px;
  border: 32px solid rgba(255, 255, 255, 0.07);
  border-radius: 50%;
}

/* CTA 胶片条 */
.cta-banner .section-label {
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.25);
}

.cta-banner .section-label::before {
  content: '★';
}

.cta-banner h2 {
  color: var(--white);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: var(--white);
  color: var(--coral);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  background: var(--paper);
}

/* ── 页脚 ── */
.site-footer {
  background: var(--paper-deep);
  padding: 72px 0 32px;
  position: relative;
  margin-top: 24px;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(
    to right,
    var(--coral) 0 8px,
    var(--paper-deep) 8px 24px
  );
  opacity: 0.35;
}

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

.footer-brand .logo {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  color: var(--ink);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--coral);
  border-radius: 2px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
  transition: color 0.25s, padding-left 0.25s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(32, 30, 26, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.footer-bottom a {
  color: var(--coral);
  text-decoration: none;
}

/* ── 工具类 ── */
.text-accent {
  color: var(--coral);
  font-weight: 600;
}

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

.text-center .section-label {
  margin-left: auto;
  margin-right: auto;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--ink-soft);
  line-height: 1.75;
  opacity: 1;
}

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

/* ── 动画 ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(251, 246, 238, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--line);
    animation: fadeDown 0.35s var(--ease);
  }

  .main-nav.open a {
    padding: 14px 16px;
    font-size: 1rem;
    border-bottom: 1px solid var(--line);
    display: block;
    border-radius: var(--radius-sm);
  }

  .main-nav.open a:last-child {
    border-bottom: none;
  }

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

  .hero {
    padding: 130px 20px 80px;
    gap: 48px;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-image {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .section {
    padding: 72px 0;
  }

  .cta-banner {
    padding: 56px 24px;
    border-radius: 18px;
  }

  .cta-banner h2 {
    font-size: 1.9rem;
  }

  .content-wall-item img {
    height: 180px;
  }
}

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

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

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

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

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

  .hero p {
    font-size: 1rem;
  }

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

  .stats-bar {
    gap: 12px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-item {
    padding: 28px 16px;
  }

  .cta-banner {
    padding: 44px 20px;
  }

  .faq-item .faq-question {
    padding: 16px 20px;
    font-size: 0.95rem;
  }

  .footer-bottom {
    font-size: 0.78rem;
  }

  .section {
    padding: 60px 0;
  }
}