@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@600;700;900&display=swap');

/* ==========================================================
   YY8090新视觉 · 复古电视影院设计系统
   "Retro CRT Cinema" — Warm Cream / Rust / Teal / Mustard
   ========================================================== */

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

:root {
  --cream: #F7F0E8;
  --paper: #FDF8F0;
  --teal-light: #EBF2EF;
  --rust: #C84B31;
  --rust-dark: #A63D24;
  --teal: #2A9D8F;
  --teal-dark: #1B6E65;
  --mustard: #E9A63B;
  --brown: #3D2C2E;
  --gray: #8A7B7A;
  --line: rgba(61, 44, 46, 0.12);
  --hard-shadow: 4px 4px 0 rgba(61, 44, 46, 0.9);
  --hard-shadow-teal: 4px 4px 0 rgba(42, 157, 143, 0.8);
  --hard-shadow-rust: 6px 6px 0 rgba(200, 75, 49, 0.8);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background-color: var(--cream);
  color: var(--brown);
  overflow-x: hidden;
  line-height: 1.7;
  position: relative;
}

/* 胶片颗粒纹理（全屏覆盖） */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 250px 250px;
}

::selection {
  background: var(--mustard);
  color: var(--brown);
}

a {
  color: inherit;
}

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

/* ---------- 布局容器 ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.section {
  padding: 88px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--teal-light);
}

/* ---------- 导航栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 248, 240, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid var(--brown);
  box-shadow: 0 3px 0 var(--mustard);
}

.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: 900;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
  text-decoration: none;
  color: var(--brown);
  position: relative;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--rust);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 2px 2px 0 var(--brown);
  position: relative;
}

/* 电视符号小天线 */
.logo-icon::after {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  border: 2px solid var(--brown);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  background: transparent;
}

.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(--brown);
  letter-spacing: 0.3px;
  padding: 4px 2px;
  position: relative;
  transition: color 0.25s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--rust);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s cubic-bezier(0.65, 0, 0.35, 1);
}

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

.main-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: 8px 22px !important;
  border-radius: 0;
  background: var(--teal);
  color: var(--paper) !important;
  font-weight: 700;
  border: 2px solid var(--brown);
  box-shadow: 2px 2px 0 var(--brown);
  transition: all 0.25s !important;
}

.nav-cta:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--brown);
  color: var(--paper) !important;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 2px solid var(--brown);
  background: var(--paper);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}

.menu-toggle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 18px;
  height: 2px;
  background: var(--brown);
  box-shadow: 0 -5px 0 var(--brown), 0 5px 0 var(--brown);
}

.menu-toggle:hover {
  background: var(--mustard);
}

/* ---------- Hero 主视觉 ---------- */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  background: var(--cream);
  overflow: hidden;
}

/* 测试卡纹理装饰 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  background:
    linear-gradient(45deg, var(--mustard) 25%, transparent 25%),
    linear-gradient(-45deg, var(--mustard) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--mustard) 75%),
    linear-gradient(-45deg, transparent 75%, var(--mustard) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  opacity: 0.06;
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

/* 竖排装饰文字 */
.hero::after {
  content: 'Y Y 8 0 9 0';
  position: absolute;
  left: 24px;
  bottom: 40px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--gray);
  opacity: 0.5;
  writing-mode: vertical-rl;
  z-index: 0;
}

.hero-content {
  max-width: 600px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 0;
  background: var(--mustard);
  color: var(--brown);
  border: 2px solid var(--brown);
  box-shadow: 2px 2px 0 var(--brown);
  margin-bottom: 20px;
  position: relative;
}

/* 右上角小标签角标 */
.hero-eyebrow::before {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 10px;
  height: 10px;
  background: var(--rust);
  border: 2px solid var(--brown);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--brown);
  margin-bottom: 20px;
  font-family: 'Noto Serif SC', system-ui, 'PingFang SC', sans-serif;
  position: relative;
}

.hero h1 .text-accent {
  color: var(--rust);
  position: relative;
  display: inline-block;
}

.hero h1 .text-accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--mustard);
  opacity: 0.35;
  z-index: -1;
}

.hero p {
  font-size: 1.05rem;
  color: var(--gray);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.8;
  border-left: 3px solid var(--teal);
  padding-left: 16px;
}

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

/* CRT 电视相框 */
.hero-image {
  border-radius: 0;
  overflow: hidden;
  position: relative;
  border: 5px solid var(--brown);
  box-shadow: 10px 10px 0 var(--rust);
  background: var(--teal-dark);
  flex: 0 0 440px;
  transform: rotate(1.5deg);
  transition: transform 0.3s ease;
  z-index: 2;
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.02);
}

/* 电视机身装饰 */
.hero-image::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 10px;
  background: var(--brown);
  z-index: 4;
  border-radius: 4px 4px 0 0;
}

/* 电视机旋钮 */
.hero-image::after {
  content: '';
  position: absolute;
  bottom: -18px;
  right: 16px;
  width: 22px;
  height: 22px;
  background: var(--mustard);
  border: 3px solid var(--brown);
  border-radius: 50%;
  z-index: 4;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.2);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: contrast(1.08) saturate(0.85);
  transition: filter 0.3s;
}

/* CRT 扫描线 */
.hero-image .crt-scanlines {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.07) 3px,
    rgba(255, 255, 255, 0.07) 4px
  );
  z-index: 3;
  pointer-events: none;
}

/* VHS 追踪线 */
.hero-image::marker {
  content: '';
}

.hero-image {
  position: relative;
}

.hero-image .vhs-track {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.35);
  filter: blur(3px);
  z-index: 4;
  animation: vhsTracking 9s linear infinite;
  pointer-events: none;
}

@keyframes vhsTracking {
  0%, 100% { top: 20%; opacity: 0.3; }
  15% { top: 35%; opacity: 0.5; }
  30% { top: 15%; opacity: 0.2; }
  45% { top: 50%; opacity: 0.4; }
  60% { top: 30%; opacity: 0.3; }
  75% { top: 60%; opacity: 0.5; }
  90% { top: 25%; opacity: 0.2; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 0;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.5, 0, 0.1, 1);
  position: relative;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--rust);
  color: var(--paper);
  border: 2px solid var(--brown);
  box-shadow: 4px 4px 0 var(--brown);
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--brown);
  background: var(--rust-dark);
}

.btn-primary:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--brown);
}

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

.btn-outline:hover {
  box-shadow: 4px 4px 0 var(--mustard);
  transform: translate(-2px, -2px);
  background: rgba(233, 166, 59, 0.15);
}

.btn-outline:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--mustard);
}

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--rust);
  background: rgba(200, 75, 49, 0.08);
  padding: 5px 14px;
  border-left: 4px solid var(--rust);
  position: relative;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--brown);
  font-family: 'Noto Serif SC', system-ui, 'PingFang SC', sans-serif;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 44px;
  height: 3px;
  background: var(--mustard);
  border-radius: 2px;
}

.section-desc {
  max-width: 560px;
  color: var(--gray);
  margin-bottom: 44px;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
  perspective: 1000px;
}

.category-card {
  border-radius: 0;
  padding: 28px 24px;
  border: 2px solid var(--brown);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--brown);
  transition: all 0.3s cubic-bezier(0.5, 0, 0.1, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

/* 电影胶片条顶部装饰 */
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background: repeating-linear-gradient(
    90deg,
    var(--brown) 0px, var(--brown) 14px,
    var(--paper) 14px, var(--paper) 18px
  );
  border-bottom: 2px solid var(--brown);
}

.category-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0 var(--rust);
  background: var(--paper);
}

.category-card:active {
  transform: translate(0, 0);
  box-shadow: 2px 2px 0 var(--rust);
}

.category-card::after {
  content: '▶';
  position: absolute;
  right: 16px;
  bottom: 16px;
  font-size: 0.7rem;
  color: var(--rust);
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s;
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.4rem;
  background: var(--teal-light);
  border: 2px solid var(--teal);
  color: var(--teal);
  position: relative;
  z-index: 1;
  box-shadow: 2px 2px 0 rgba(42, 157, 143, 0.3);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--rust);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s;
  letter-spacing: 0.5px;
}

.card-link:hover {
  gap: 12px;
  color: var(--rust-dark);
}

/* ---------- 特性块 ---------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: 0;
  overflow: hidden;
  position: relative;
  border: 4px solid var(--brown);
  box-shadow: 8px 8px 0 var(--mustard);
  transform: rotate(-1deg);
  transition: transform 0.3s ease;
  aspect-ratio: 4/3;
  background: var(--teal-light);
}

.feature-image:hover {
  transform: rotate(0deg);
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

/* 扫描线 */
.feature-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.05) 3px,
    rgba(255, 255, 255, 0.05) 4px
  );
  pointer-events: none;
}

.feature-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--brown);
  letter-spacing: -0.5px;
}

.feature-text p {
  color: var(--gray);
  margin-bottom: 24px;
  line-height: 1.8;
}

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--brown);
  font-weight: 500;
  border-bottom: 1px dashed var(--line);
}

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

.feature-list li::before {
  content: '▶';
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--rust);
  background: rgba(200, 75, 49, 0.1);
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(200, 75, 49, 0.3);
}

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

.stat-item {
  padding: 28px 16px;
  border-radius: 0;
  border: 2px solid var(--brown);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--teal);
  position: relative;
  transition: all 0.3s;
}

.stat-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--teal);
}

/* 顶部小圆点装饰 */
.stat-item::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  background: var(--mustard);
  border: 2px solid var(--brown);
  border-radius: 50%;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--rust);
  font-family: 'Courier New', 'Menlo', monospace;
  letter-spacing: -2px;
  line-height: 1.2;
  display: block;
  position: relative;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray);
  margin-top: 6px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

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

.content-wall-item {
  border-radius: 0;
  overflow: hidden;
  border: 2px solid var(--brown);
  background: var(--paper);
  box-shadow: 3px 3px 0 var(--line);
  transition: all 0.3s cubic-bezier(0.5, 0, 0.1, 1);
  position: relative;
  cursor: pointer;
}

/* 胶片孔条 */
.content-wall-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background: repeating-linear-gradient(
    90deg,
    var(--brown) 0px, var(--brown) 16px,
    var(--paper) 16px, var(--paper) 20px
  );
  z-index: 3;
  border-bottom: none;
}

.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 var(--mustard);
  border-color: var(--brown);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 2px solid var(--brown);
  display: block;
  filter: saturate(0.85) contrast(1.05);
  transition: filter 0.3s, transform 0.5s;
}

.content-wall-item:hover img {
  filter: saturate(1) contrast(1.1);
  transform: scale(1.03);
}

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

.content-wall-body h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--brown);
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.6;
}

/* 角标 */
.content-wall-item .tag {
  position: absolute;
  top: 16px;
  right: 12px;
  background: var(--rust);
  color: var(--paper);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 10px;
  border: 1px solid var(--brown);
  z-index: 4;
  box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

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

.faq-item {
  border: 2px solid var(--brown);
  border-radius: 0;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--paper);
  box-shadow: 3px 3px 0 rgba(42, 157, 143, 0.25);
  transition: all 0.3s;
}

.faq-item:hover {
  box-shadow: 5px 5px 0 var(--teal);
  transform: translate(-2px, -2px);
}

.faq-item.open {
  box-shadow: 3px 3px 0 var(--mustard);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: var(--brown);
  background: var(--paper);
  position: relative;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--rust);
  transition: transform 0.3s, color 0.3s;
  line-height: 1;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

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

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  color: var(--gray);
  font-size: 0.9rem;
  line-height: 1.8;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
  margin-top: 0;
}

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

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

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding: 64px 48px;
  text-align: center;
  border-radius: 0;
  color: var(--paper);
  background: var(--teal);
  border: 4px solid var(--brown);
  box-shadow: 8px 8px 0 var(--rust);
  position: relative;
  overflow: hidden;
}

/* 装饰斜纹 */
.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(45deg, transparent 65%, rgba(255, 255, 255, 0.06) 65%),
    linear-gradient(-45deg, transparent 65%, rgba(255, 255, 255, 0.06) 65%);
  background-size: 32px 32px;
  pointer-events: none;
}

/* CRT 扫描线 */
.cta-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.04) 3px,
    rgba(255, 255, 255, 0.04) 4px
  );
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--paper);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -1px;
  position: relative;
  z-index: 1;
  margin-bottom: 12px;
  font-family: 'Noto Serif SC', system-ui, 'PingFang SC', sans-serif;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 480px;
  margin: 0 auto 24px;
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
}

.cta-banner .btn-primary {
  background: var(--paper);
  color: var(--brown) !important;
  border: 2px solid var(--brown);
  box-shadow: 4px 4px 0 var(--brown);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--mustard);
  box-shadow: 7px 7px 0 var(--brown);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 64px 0 28px;
  background: var(--teal-light);
  border-top: 4px solid var(--rust);
  position: relative;
}

/* 页脚胶片条 */
.site-footer::before {
  content: '';
  position: absolute;
  top: -4px;
  left: 0;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--rust) 0px, var(--rust) 20px,
    var(--mustard) 20px, var(--mustard) 28px
  );
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--gray);
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--brown);
  position: relative;
}

.footer-col h4::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--mustard);
  margin-top: 6px;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--gray);
  font-size: 0.85rem;
  padding: 4px 0;
  transition: color 0.2s, padding-left 0.2s;
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 44px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray);
  letter-spacing: 1px;
}

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

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--gray);
  font-size: 0.95rem;
  line-height: 1.8;
  text-align: center;
}

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

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 10px;
  background: var(--cream);
}

::-webkit-scrollbar-thumb {
  background: var(--rust);
  border: 2px solid var(--brown);
  border-radius: 0;
}

::-webkit-scrollbar-track {
  background: var(--cream);
  border-left: 1px solid var(--line);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-image {
    flex-basis: 360px;
  }
  .hero h1 {
    font-size: 2.4rem;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: var(--paper);
    padding: 24px;
    gap: 16px;
    border-bottom: 2px solid var(--brown);
    box-shadow: 0 6px 0 var(--mustard);
    z-index: 999;
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    border-bottom: none !important;
    text-align: center;
  }

  .hero {
    padding: 110px 0 50px;
    min-height: auto;
    flex-direction: column;
    gap: 40px;
  }

  .hero::before {
    width: 100%;
    clip-path: none;
  }

  .hero::after {
    display: none;
  }

  .hero-content {
    max-width: 100%;
    text-align: left;
  }

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

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

  .hero-image {
    flex-basis: auto;
    width: 100%;
    max-width: 440px;
    margin: 0 auto;
    transform: rotate(0deg);
  }

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

  .btn {
    justify-content: center;
  }

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

  .feature-image {
    order: -1;
  }

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

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

  .section {
    padding: 60px 0;
  }

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

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

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

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

  .cta-banner {
    padding: 44px 24px;
  }

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

@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;
  }

  .hero h1 {
    font-size: 1.6rem;
    letter-spacing: -0.5px;
  }

  .hero-eyebrow {
    font-size: 0.7rem;
    padding: 4px 12px;
  }

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

  .stat-item {
    padding: 20px 16px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .btn {
    width: 100%;
    padding: 12px 20px;
  }

  .cta-banner {
    padding: 32px 16px;
  }

  .cta-banner h2 {
    font-size: 1.2rem;
  }

  .container {
    padding: 0 16px;
  }

  .article-preview img {
    height: 160px;
  }
}

/* ---------- 动画与动效 ---------- */

/* 标题闪烁 */
@keyframes subtleFlicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.4; }
  94% { opacity: 0.8; }
  95% { opacity: 0.2; }
  96% { opacity: 1; }
}

.hero-image {
  animation: subtleFlicker 12s infinite;
}

/* 卡片入场动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cards-grid .category-card,
.content-wall .content-wall-item {
  animation: fadeInUp 0.6s cubic-bezier(0.5, 0, 0.1, 1) both;
}

.cards-grid .category-card:nth-child(2),
.content-wall .content-wall-item:nth-child(2) { animation-delay: 0.1s; }
.cards-grid .category-card:nth-child(3),
.content-wall .content-wall-item:nth-child(3) { animation-delay: 0.2s; }
.cards-grid .category-card:nth-child(4),
.content-wall .content-wall-item:nth-child(4) { animation-delay: 0.3s; }
.cards-grid .category-card:nth-child(5),
.content-wall .content-wall-item:nth-child(5) { animation-delay: 0.4s; }
.cards-grid .category-card:nth-child(6),
.content-wall .content-wall-item:nth-child(6) { animation-delay: 0.5s; }

/* 尊重减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}