/* ============================================
   天美传媒 · 宣纸水墨设计系统
   “天赐之美，传世之媒” — 东方数字山水
   ============================================ */

:root {
  /* 宣纸色系 */
  --paper: #FBF8F3;
  --paper-deep: #F2EDE3;
  --paper-mist: #F6F2EA;
  /* 墨色 */
  --ink: #2B2823;
  --ink-soft: #6B655C;
  /* 朱砂 */
  --vermilion: #BC4731;
  --vermilion-deep: #A03B28;
  --vermilion-soft: rgba(188, 71, 49, 0.12);
  /* 玉色 */
  --jade: #427A6E;
  --jade-light: #7AA79E;
  /* 鎏金 */
  --gold: #C9962E;
  --gold-light: rgba(201, 150, 46, 0.18);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background-color: var(--paper);
  background-image: radial-gradient(rgba(43, 40, 35, 0.007) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, .hero h1, .section-title, .stat-number, .faq-question,
.logo, .category-card h3, .feature-text h3 {
  font-family: 'Songti SC', 'STSong', 'Noto Serif SC', 'Source Han Serif SC', 'SimSun', serif;
}

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

a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--vermilion);
  color: var(--paper);
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--paper);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--gold), var(--vermilion));
  border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #B8892A, var(--vermilion-deep));
}

/* ============ 核心布局 ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--paper-deep);
}

.section::after {
  content: '';
  position: absolute;
  right: 24px;
  bottom: 40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(66, 122, 110, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251, 248, 243, 0.88);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(43, 40, 35, 0.08);
  box-shadow: 0 4px 24px rgba(43, 40, 35, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: 0.04em;
  position: relative;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--vermilion), var(--vermilion-deep));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: 'Songti SC', serif;
  box-shadow: 0 2px 10px rgba(188, 71, 49, 0.35);
  letter-spacing: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
  padding: 4px 0;
  position: relative;
  transition: color 0.3s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--vermilion);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.main-nav a:hover::after {
  width: 60%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--vermilion), var(--vermilion-deep)) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 4px !important;
  font-weight: 700 !important;
  letter-spacing: 0.14em !important;
  box-shadow: 0 4px 16px rgba(188, 71, 49, 0.3);
  transition: transform 0.3s, box-shadow 0.3s !important;
}

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

.nav-cta:hover {
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(188, 71, 49, 0.42);
}

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

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: 0.3s;
}

/* ============ Hero ============ */
.hero {
  min-height: 92vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 82% 25%, var(--gold-light) 0%, transparent 50%),
    radial-gradient(ellipse at 15% 80%, rgba(66, 122, 110, 0.13) 0%, transparent 55%),
    radial-gradient(ellipse at 45% 100%, rgba(188, 71, 49, 0.06) 0%, transparent 50%),
    linear-gradient(160deg, var(--paper) 0%, #F1EBDF 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 65%;
  height: 100%;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(43, 40, 35, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(201, 150, 46, 0.1) 0%, transparent 40%);
  transform: skewX(-8deg);
  z-index: 0;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 55%;
  left: 45%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(188, 71, 49, 0.04) 0%, transparent 50%);
  border-radius: 50%;
  pointer-events: none;
  animation: inkFloat 18s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes inkFloat {
  0% { transform: translate(-50%, -50%) scale(1); }
  100% { transform: translate(-40%, -42%) scale(1.15); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 100%;
}

.hero-content::before {
  content: '天';
  position: absolute;
  top: -90px;
  left: -30px;
  font-family: 'Songti SC', 'STSong', serif;
  font-size: 240px;
  font-weight: 900;
  line-height: 1;
  color: rgba(43, 40, 35, 0.035);
  z-index: -1;
  pointer-events: none;
  user-select: none;
}

.hero-eyebrow {
  display: inline-block;
  background: linear-gradient(135deg, var(--vermilion), var(--vermilion-deep));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 18px 6px 20px;
  border-radius: 3px;
  margin-bottom: 24px;
  letter-spacing: 0.18em;
  box-shadow: 0 2px 12px rgba(188, 71, 49, 0.35);
  position: relative;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.1rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--ink);
  margin-bottom: 24px;
  position: relative;
  text-shadow: 0 1px 2px rgba(43, 40, 35, 0.05);
}

.hero h1::after {
  content: '';
  display: inline-block;
  width: 0.26em;
  height: 0.26em;
  background: var(--vermilion);
  border-radius: 2px;
  margin-left: 14px;
  vertical-align: middle;
  box-shadow: 0 2px 8px rgba(188, 71, 49, 0.4);
}

.hero p {
  font-size: 1.05rem;
  line-height: 1.9;
  opacity: 0.78;
  color: var(--ink-soft);
  max-width: 580px;
  margin-bottom: 36px;
  border-left: 3px solid rgba(66, 122, 110, 0.35);
  padding-left: 20px;
}

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

.hero-content > * {
  animation: fadeUp 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}
.hero-content > *:nth-child(1) { animation-delay: 0.08s; }
.hero-content > *:nth-child(2) { animation-delay: 0.18s; }
.hero-content > *:nth-child(3) { animation-delay: 0.28s; }
.hero-content > *:nth-child(4) { animation-delay: 0.38s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-image {
  position: relative;
  z-index: 1;
  border-radius: 4px 24px 4px 24px;
  overflow: hidden;
  border: 1px solid rgba(43, 40, 35, 0.08);
  box-shadow:
    8px 8px 0 rgba(188, 71, 49, 0.07),
    16px 24px 56px rgba(43, 40, 35, 0.12);
  animation: heroImageIn 1.1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s both;
}

@keyframes heroImageIn {
  from {
    opacity: 0;
    transform: translateY(28px) rotate(1deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
}

.hero-image img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.hero-image::before {
  content: '美';
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--vermilion), var(--vermilion-deep));
  color: #fff;
  font-family: 'Songti SC', serif;
  font-size: 19px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  z-index: 2;
  box-shadow: 0 4px 16px rgba(188, 71, 49, 0.45);
  animation: inkPulse 3s ease-in-out infinite;
}

@keyframes inkPulse {
  0%, 100% { opacity: 0.92; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn-primary {
  background: linear-gradient(135deg, var(--vermilion), var(--vermilion-deep));
  color: #fff;
  box-shadow: 0 6px 24px rgba(188, 71, 49, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(188, 71, 49, 0.48);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--jade);
  color: var(--jade);
}

.btn-outline:hover {
  background: rgba(66, 122, 110, 0.08);
  border-color: var(--jade-light);
  color: var(--jade);
  transform: translateY(-2px);
}

/* ============ 标签/标题 ============ */
.section-label {
  display: inline-block;
  color: var(--vermilion);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  margin-bottom: 16px;
  position: relative;
  padding-left: 20px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 3px;
  background: var(--vermilion);
  border-radius: 2px;
}

.section-label::after {
  content: '';
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 3px;
  background: var(--vermilion);
  border-radius: 50%;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.section-desc {
  max-width: 620px;
  opacity: 0.72;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 48px;
}

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

.category-card {
  background: #FDFBF7;
  border: 1px solid rgba(43, 40, 35, 0.06);
  border-radius: 3px 18px 3px 18px;
  padding: 36px 28px 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--vermilion), rgba(188, 71, 49, 0.08));
  transform: scaleX(0.3);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(43, 40, 35, 0.08), 0 4px 8px rgba(43, 40, 35, 0.04);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  background: rgba(66, 122, 110, 0.1);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  position: relative;
  transition: background 0.3s;
}

.category-card:nth-child(even) .card-icon {
  background: rgba(188, 71, 49, 0.08);
}

.card-icon::after {
  content: '';
  position: absolute;
  bottom: 3px;
  right: 3px;
  width: 10px;
  height: 10px;
  background: var(--vermilion);
  border-radius: 2px;
  opacity: 0.35;
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--ink);
}

.category-card p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--vermilion);
  letter-spacing: 0.08em;
  transition: gap 0.3s;
}

.card-link::after {
  content: '→';
  margin-left: 4px;
  transition: transform 0.3s;
}

.card-link:hover {
  gap: 4px;
}

.card-link:hover::after {
  transform: translateX(4px);
}

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

.feature-block:nth-of-type(even) .feature-image {
  order: 2;
}

.feature-image {
  border-radius: 4px 22px 4px 22px;
  overflow: hidden;
  border: 1px solid rgba(43, 40, 35, 0.06);
  box-shadow:
    6px 6px 0 rgba(66, 122, 110, 0.08),
    14px 24px 52px rgba(43, 40, 35, 0.1);
  position: relative;
}

.feature-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: transform 0.8s;
}

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

.feature-image::before {
  content: '雅';
  position: absolute;
  top: 14px;
  left: 14px;
  width: 34px;
  height: 34px;
  background: rgba(66, 122, 110, 0.9);
  color: #fff;
  font-family: 'Songti SC', serif;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  z-index: 1;
  box-shadow: 0 2px 10px rgba(66, 122, 110, 0.4);
}

.feature-text {
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--ink-soft);
}

.feature-text h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.feature-list {
  list-style: none;
  margin-top: 16px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  color: var(--ink);
  font-size: 0.95rem;
  border-bottom: 1px dashed rgba(43, 40, 35, 0.06);
}

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

.feature-list li::before {
  content: '◈';
  font-weight: 700;
  color: var(--jade);
  font-size: 12px;
}

/* ============ 数据条 ============ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  background: #FDFBF7;
  padding: 40px 20px 36px;
  border-radius: 3px 16px 3px 16px;
  border: 1px solid rgba(43, 40, 35, 0.06);
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(43, 40, 35, 0.08);
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold), transparent);
  border-radius: 2px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--ink);
  line-height: 1;
  display: inline-block;
  position: relative;
}

.stat-number::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--vermilion);
  border-radius: 1px;
  margin-left: 8px;
  vertical-align: super;
}

.stat-label {
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  opacity: 0.65;
  color: var(--ink-soft);
  margin-top: 12px;
  text-transform: uppercase;
}

/* ============ 内容墙 ============ */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  background: #FBF8F2;
  border: 1px solid rgba(43, 40, 35, 0.07);
  border-radius: 3px;
  padding: 10px;
  padding-bottom: 0;
  overflow: hidden;
  position: relative;
  box-shadow:
    0 0 0 1px rgba(43, 40, 35, 0.02),
    0 12px 32px rgba(43, 40, 35, 0.06);
  transition: transform 0.35s, box-shadow 0.35s;
}

.content-wall-item:hover {
  transform: translateY(-5px) rotate(0.3deg);
  box-shadow:
    0 0 0 1px rgba(43, 40, 35, 0.02),
    0 20px 44px rgba(43, 40, 35, 0.12);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-radius: 2px;
  transition: transform 0.6s;
}

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

.content-wall-item::before {
  content: '';
  position: absolute;
  top: 18px;
  right: 18px;
  width: 24px;
  height: 24px;
  border: 2px solid rgba(188, 71, 49, 0.5);
  border-radius: 2px;
  background: rgba(251, 248, 243, 0.92);
  z-index: 1;
  transition: border-color 0.3s, background 0.3s;
}

.content-wall-item:hover::before {
  border-color: var(--vermilion);
  background: var(--vermilion);
}

.content-wall-body {
  padding: 18px 8px 20px;
}

.content-wall-body h4 {
  font-family: 'Songti SC', serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.faq-item {
  background: #FDFBF7;
  border: 1px solid rgba(43, 40, 35, 0.06);
  border-radius: 3px 14px 3px 14px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow 0.3s;
}

.faq-item.open {
  box-shadow: 0 8px 28px rgba(43, 40, 35, 0.07);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
  transition: color 0.3s;
}

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

.faq-item .faq-question::after {
  content: '＋';
  font-family: sans-serif;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--vermilion);
  flex-shrink: 0;
  margin-left: 16px;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s;
}

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

.faq-item .faq-answer {
  display: none;
  padding: 0 24px 20px;
  margin: 0 24px;
  opacity: 0.75;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--ink-soft);
  border-top: 1px dashed rgba(43, 40, 35, 0.07);
  padding-top: 14px;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ============ CTA横幅 ============ */
.cta-banner {
  background: linear-gradient(135deg, #B8432F 0%, #C85A3F 50%, #D47052 100%);
  padding: 64px 48px;
  text-align: center;
  border-radius: 4px 28px 4px 28px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 56px rgba(188, 71, 49, 0.35);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  transform: rotate(15deg);
  pointer-events: none;
}

.cta-banner::after {
  content: '媒';
  position: absolute;
  bottom: -24px;
  left: 20px;
  font-family: 'Songti SC', serif;
  font-size: 150px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.1);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  position: relative;
  z-index: 1;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--vermilion);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

.cta-banner .btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--paper-deep);
  padding: 64px 0 32px;
  position: relative;
  border-top: 1px solid rgba(43, 40, 35, 0.06);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold), var(--jade));
  opacity: 0.5;
}

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

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-top: 12px;
}

.footer-col h4 {
  font-family: 'Songti SC', serif;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
  letter-spacing: 0.08em;
}

.footer-col a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.88rem;
  display: block;
  padding: 5px 0;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
  color: var(--vermilion);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(43, 40, 35, 0.1);
  margin-top: 44px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

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

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

.seo-description {
  max-width: 620px;
  margin: 0 auto 48px;
  opacity: 0.72;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.85;
}

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

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 120px;
  }
  .hero-image img {
    height: 380px;
  }
  .feature-block {
    gap: 44px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

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

  .feature-block:nth-of-type(even) .feature-image {
    order: 0;
  }

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

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    height: calc(100vh - 76px);
    background: var(--paper);
    padding: 36px 28px;
    gap: 20px;
    align-items: flex-start;
    border-bottom: 1px solid rgba(43, 40, 35, 0.08);
    box-shadow: 0 24px 56px rgba(43, 40, 35, 0.1);
    overflow-y: auto;
  }

  .main-nav.open a {
    font-size: 1.05rem;
    padding: 8px 0;
    width: 100%;
  }

  .main-nav.open .nav-cta {
    margin-top: 12px;
    display: inline-flex;
    justify-content: center;
    width: 100%;
    text-align: center;
    padding: 14px 24px !important;
  }

  .hero {
    padding-top: 110px;
    min-height: auto;
  }

  .hero-image img {
    height: 300px;
  }

  .hero-content::before {
    font-size: 180px;
    top: -60px;
  }

  .content-wall {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
  }

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

  .container {
    padding: 0 20px;
  }
}

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

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

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

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

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-banner::after {
    font-size: 100px;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }

  .stats-bar {
    gap: 12px;
  }

  .stat-item {
    padding: 28px 16px 24px;
  }

  .stat-number {
    font-size: 2.4rem;
  }
}