/* ==========================================================================
   九色视频 — "Warm Cinema" 设计系统
   温暖纸面质感 × 影院编辑风 × 九色标记
   ========================================================================== */

/* ---------- 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:#FBF8F3;
  color:#1A1815;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

::selection { background:#FF4D3D; color:#FFF; }

/* ---------- 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:#FFF8F2; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position:fixed;
  top:0; left:0; width:100%;
  z-index:1000;
  background:rgba(251,248,243,0.92);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(26,24,21,0.06);
}

.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:10px;
  font-weight:900;
  font-size:1.3rem;
  text-decoration:none;
  color:#1A1815;
  letter-spacing:-0.02em;
}

.logo-icon {
  width:38px;
  height:38px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  color:#FFF;
  background:linear-gradient(135deg,#FF4D3D 0%,#E8A13D 100%);
  box-shadow:0 4px 14px rgba(255,77,61,0.3);
}

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

.main-nav a {
  text-decoration:none;
  font-size:0.92rem;
  font-weight:500;
  color:#4A453E;
  position:relative;
  transition:color 0.3s ease;
}

.main-nav a::after {
  content:'';
  position:absolute;
  bottom:-6px;
  left:50%;
  width:0;
  height:2px;
  border-radius:2px;
  background:#FF4D3D;
  transform:translateX(-50%);
  transition:width 0.3s ease;
}

.main-nav a:hover { color:#FF4D3D; }
.main-nav a:hover::after { width:100%; }

.nav-cta {
  padding:10px 24px;
  border-radius:50px;
  color:#FFF !important;
  font-weight:700;
  background:linear-gradient(135deg,#FF4D3D,#FF8A5C);
  box-shadow:0 4px 14px rgba(255,77,61,0.25);
}

.nav-cta:hover {
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(255,77,61,0.35);
}

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

.menu-toggle {
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border:none;
  background:#FFF;
  border-radius:50%;
  cursor:pointer;
  box-shadow:0 2px 10px rgba(26,24,21,0.06);
  font-size:1.1rem;
}

/* ---------- 首页 Hero ---------- */
.hero {
  min-height:72vh;
  display:flex;
  align-items:center;
  padding:140px 0 80px;
  position:relative;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(232,161,61,0.18), transparent 50%),
    radial-gradient(ellipse at 10% 80%, rgba(15,139,141,0.12), transparent 45%),
    linear-gradient(to bottom,#FBF8F3,#FFF8F2);
}

.hero::before {
  content:'';
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(26,24,21,0.05) 1.5px, transparent 1.5px);
  background-size:28px 28px;
  pointer-events:none;
}

.hero::after {
  content:'9';
  position:absolute;
  right:4%;
  bottom:-12%;
  font-size:38rem;
  font-weight:900;
  line-height:1;
  color:rgba(255,77,61,0.05);
  pointer-events:none;
  z-index:1;
}

.hero .container {
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:48px;
  flex-wrap:wrap;
}

.hero-content,
.hero-image {
  position:relative;
  z-index:2;
}

.hero-content {
  flex:1;
  min-width:300px;
  max-width:640px;
}

.hero-eyebrow {
  display:inline-block;
  font-size:0.82rem;
  font-weight:800;
  letter-spacing:2px;
  padding:6px 16px;
  border-radius:8px;
  margin-bottom:20px;
  color:#FFF;
  background:linear-gradient(90deg,#FF4D3D,#E8A13D);
  transform:rotate(-2deg);
  box-shadow:0 4px 12px rgba(255,77,61,0.25);
}

.hero h1 {
  font-size:3.6rem;
  font-weight:900;
  letter-spacing:-0.03em;
  line-height:1.12;
  margin-bottom:22px;
  color:#1A1815;
}

.hero p {
  font-size:1.12rem;
  line-height:1.7;
  opacity:0.7;
  max-width:540px;
  margin-bottom:36px;
}

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

.hero-image {
  flex:0 1 460px;
  min-width:280px;
  border-radius:24px;
  overflow:hidden;
  border:10px solid #FFF;
  background:#FFF;
  box-shadow:0 24px 48px rgba(26,24,21,0.12);
  transform:rotate(1.2deg);
  transition:transform 0.4s ease;
}

.hero-image:hover { transform:rotate(0deg) scale(1.01); }

.hero-image img {
  width:100%;
  height:auto;
  display:block;
  border-radius:16px;
}

.hero-image::before {
  content:'▶';
  position:absolute;
  top:50%; left:50%;
  width:72px; height:72px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding-left:4px;
  transform:translate(-50%,-50%);
  border-radius:50%;
  background:rgba(255,77,61,0.92);
  color:#FFF;
  font-size:1.25rem;
  font-family:system-ui,sans-serif;
  box-shadow:0 8px 24px rgba(255,77,61,0.4);
  animation:pulse 2.5s infinite;
  transition:background 0.3s ease;
}

.hero-image:hover::before { background:#E8A13D; }

@keyframes pulse {
  0%   { box-shadow:0 8px 24px rgba(255,77,61,0.4), 0 0 0 0 rgba(255,77,61,0.4); }
  70%  { box-shadow:0 8px 24px rgba(255,77,61,0.4), 0 0 0 18px rgba(255,77,61,0); }
  100% { box-shadow:0 8px 24px rgba(255,77,61,0.4), 0 0 0 0 rgba(255,77,61,0); }
}

/* ---------- 按钮 ---------- */
.btn {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 30px;
  border-radius:50px;
  font-weight:700;
  font-size:0.95rem;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:all 0.25s ease;
  letter-spacing:0.01em;
}

.btn-primary {
  color:#FFF;
  background:linear-gradient(135deg,#FF4D3D,#FF8A5C);
  box-shadow:0 4px 16px rgba(255,77,61,0.3);
}

.btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(255,77,61,0.42);
}

.btn-outline {
  background:transparent;
  border:2px solid #1A1815;
  color:#1A1815;
  box-shadow:none;
}

.btn-outline:hover {
  background:#1A1815;
  color:#FFF;
  transform:translateY(-2px);
}

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:0.78rem;
  font-weight:800;
  letter-spacing:3px;
  text-transform:uppercase;
  color:#FF4D3D;
  background:rgba(255,77,61,0.08);
  padding:6px 16px;
  border-radius:50px;
  margin-bottom:16px;
}

.section-label::before {
  content:'';
  width:8px;
  height:8px;
  border-radius:50%;
  background:#FF4D3D;
}

.section-title {
  font-size:2.6rem;
  font-weight:900;
  letter-spacing:-0.02em;
  line-height:1.2;
  margin-bottom:16px;
  color:#1A1815;
}

.section-desc {
  max-width:620px;
  font-size:1.05rem;
  line-height:1.7;
  opacity:0.7;
  margin-bottom:48px;
}

.text-center .section-title::after {
  content:'';
  display:block;
  width:56px;
  height:5px;
  margin:16px auto 0;
  border-radius:6px;
  background:linear-gradient(90deg,#FF4D3D,#E8A13D);
}

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

.category-card {
  border-radius:20px;
  padding:30px 28px 24px;
  border:1px solid rgba(26,24,21,0.05);
  border-top:5px solid transparent;
  transition:all 0.35s cubic-bezier(0.22,1,0.36,1);
  position:relative;
  overflow:hidden;
}

.category-card::after {
  content:'';
  position:absolute;
  top:0; right:0;
  width:48px; height:48px;
  border-radius:0 0 0 20px;
  background:rgba(26,24,21,0.02);
}

.category-card:hover {
  transform:translateY(-6px);
  box-shadow:0 20px 40px rgba(26,24,21,0.08);
}

/* 九色标签 —— 每张卡片独立配色 */
.category-card:nth-child(1) { background:#FFF3F0; border-top-color:#FF4D3D; }
.category-card:nth-child(2) { background:#EBF5F4; border-top-color:#0F8B8D; }
.category-card:nth-child(3) { background:#FCF4E8; border-top-color:#E8A13D; }
.category-card:nth-child(4) { background:#F0EEFE; border-top-color:#7C6FF0; }
.category-card:nth-child(5) { background:#EBF5F0; border-top-color:#3D9A6B; }
.category-card:nth-child(6) { background:#FFF0F3; border-top-color:#E85D75; }

.card-icon {
  width:48px;
  height:48px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.3rem;
  color:#FFF;
  box-shadow:0 4px 12px rgba(26,24,21,0.1);
}

.category-card:nth-child(1) .card-icon { background:#FF4D3D; }
.category-card:nth-child(2) .card-icon { background:#0F8B8D; }
.category-card:nth-child(3) .card-icon { background:#E8A13D; }
.category-card:nth-child(4) .card-icon { background:#7C6FF0; }
.category-card:nth-child(5) .card-icon { background:#3D9A6B; }
.category-card:nth-child(6) .card-icon { background:#E85D75; }

.card-link {
  display:inline-flex;
  align-items:center;
  font-weight:700;
  font-size:0.88rem;
  color:#FF4D3D;
  text-decoration:none;
  margin-top:6px;
  transition:gap 0.2s ease;
  gap:4px;
}

.card-link::after { content:'→'; transition:transform 0.2s ease; }
.card-link:hover::after { transform:translateX(5px); }

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

.feature-image {
  position:relative;
  border-radius:24px;
}

.feature-image::before {
  content:'';
  position:absolute;
  top:-14px;
  left:-14px;
  width:100%;
  height:100%;
  border:2px solid #E8A13D;
  border-radius:24px;
  transition:transform 0.3s ease;
}

.feature-block:hover .feature-image::before { transform:translate(4px,4px); }

.feature-image img {
  position:relative;
  z-index:1;
  width:100%;
  height:auto;
  display:block;
  border-radius:24px;
  box-shadow:0 20px 40px rgba(26,24,21,0.1);
  transition:transform 0.4s ease;
}

.feature-block:hover .feature-image img { transform:rotate(-0.8deg); }

.feature-text { position:relative; z-index:2; }

.feature-text .section-title { margin-bottom:20px; }

.feature-list {
  list-style:none;
  margin-top:8px;
}

.feature-list li {
  padding:8px 0;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1rem;
  color:#2A2620;
}

.feature-list li::before {
  content:'✓';
  width:24px;
  height:24px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  border-radius:50%;
  background:#0F8B8D;
  color:#FFF;
  font-size:0.72rem;
  font-weight:800;
  box-shadow:0 2px 6px rgba(15,139,141,0.3);
}

/* ---------- 数据条 ---------- */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid rgba(26,24,21,0.07);
  border-bottom:1px solid rgba(26,24,21,0.07);
  padding:32px 0;
}

.stat-item {
  text-align:center;
  padding:24px 16px;
  border-left:1px solid rgba(26,24,21,0.06);
}

.stat-item:first-child { border-left:none; }

.stat-number {
  font-size:3rem;
  font-weight:900;
  letter-spacing:-0.03em;
  line-height:1.1;
  background:linear-gradient(120deg,#FF4D3D,#E8A13D);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.stat-label {
  font-size:0.88rem;
  letter-spacing:1px;
  opacity:0.55;
  margin-top:8px;
}

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

.content-wall-item {
  position:relative;
  border-radius:20px;
  overflow:hidden;
  border:1px solid rgba(26,24,21,0.05);
  background:#FFF;
  box-shadow:0 2px 8px rgba(26,24,21,0.04);
  transition:all 0.35s cubic-bezier(0.22,1,0.36,1);
}

.content-wall-item:hover {
  transform:translateY(-6px);
  box-shadow:0 20px 40px rgba(26,24,21,0.1);
}

.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  display:block;
  transition:transform 0.5s ease;
}

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

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

.content-wall-body::after {
  content:'';
  display:block;
  margin-top:16px;
  border-top:2px dashed rgba(26,24,21,0.1);
}

.content-wall-body h4 {
  font-size:1.05rem;
  font-weight:800;
  letter-spacing:-0.01em;
  margin-bottom:6px;
  transition:color 0.2s ease;
}

.content-wall-item:hover .content-wall-body h4 { color:#FF4D3D; }

.content-wall-body p {
  font-size:0.88rem;
  opacity:0.6;
  line-height:1.6;
}

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

.faq-item {
  border:1px solid rgba(26,24,21,0.08);
  border-radius:16px;
  margin-bottom:10px;
  background:#FFF;
  overflow:hidden;
  transition:all 0.3s ease;
}

.faq-item.open {
  border-color:rgba(255,77,61,0.28);
  box-shadow:0 8px 24px rgba(26,24,21,0.06);
}

.faq-item .faq-question {
  padding:20px 24px;
  font-weight:700;
  font-size:1rem;
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
}

.faq-item .faq-question::after {
  content:'+';
  width:32px;
  height:32px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  background:#FBF8F3;
  border-radius:50%;
  font-size:1.15rem;
  font-weight:700;
  color:#FF4D3D;
  transition:all 0.3s ease;
}

.faq-item.open .faq-question::after {
  transform:rotate(45deg);
  background:#FF4D3D;
  color:#FFF;
}

.faq-item .faq-answer {
  padding:0 24px 20px;
  display:none;
  opacity:0.75;
  font-size:0.95rem;
  line-height:1.75;
}

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

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding:72px 24px;
  text-align:center;
  border-radius:32px;
  color:#FFF;
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 15% 120%, rgba(255,255,255,0.3), transparent 50%),
    radial-gradient(circle at 90% -20%, rgba(255,255,255,0.2), transparent 45%),
    linear-gradient(135deg,#FF4D3D 0%,#FF7A45 50%,#E8A13D 100%);
  box-shadow:0 24px 48px rgba(255,77,61,0.28);
}

/* 胶片齿孔装饰 */
.cta-banner::before,
.cta-banner::after {
  content:'';
  position:absolute;
  left:0;
  right:0;
  height:18px;
  background-image:radial-gradient(rgba(255,255,255,0.7) 4px, transparent 4px);
  background-size:18px 18px;
  background-position:14px 0;
  opacity:0.45;
}

.cta-banner::before { top:0; }
.cta-banner::after  { bottom:0; }

.cta-banner h2 {
  color:#FFF;
  font-size:2.4rem;
  font-weight:900;
  letter-spacing:-0.02em;
  margin-bottom:12px;
}

.cta-banner p {
  color:rgba(255,255,255,0.9);
  max-width:520px;
  margin:0 auto 32px;
  font-size:1rem;
  line-height:1.7;
}

.cta-banner .btn-primary {
  background:#FFF;
  color:#FF4D3D;
  box-shadow:0 8px 20px rgba(0,0,0,0.15);
}

.cta-banner .btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(0,0,0,0.2);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background:#FBF8F3;
  padding:64px 0 28px;
  border-top:1px solid rgba(26,24,21,0.06);
}

.site-footer .container { max-width:1200px; }

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

.footer-brand .logo {
  font-size:1.4rem;
  margin-bottom:14px;
}

.footer-brand p {
  max-width:320px;
  color:rgba(26,24,21,0.65);
  font-size:0.92rem;
  line-height:1.8;
}

.footer-col h4 {
  font-size:1rem;
  font-weight:800;
  margin-bottom:16px;
  color:#1A1815;
  letter-spacing:0.02em;
}

.footer-col a {
  display:block;
  text-decoration:none;
  color:rgba(26,24,21,0.6);
  font-size:0.9rem;
  padding:5px 0;
  transition:color 0.2s ease;
}

.footer-col a:hover { color:#FF4D3D; }

.footer-bottom {
  border-top:1px solid rgba(26,24,21,0.06);
  margin-top:48px;
  padding-top:20px;
  text-align:center;
  font-size:0.84rem;
  color:rgba(26,24,21,0.45);
}

/* ---------- 工具类 ---------- */
.text-accent {
  color:#FF4D3D;
  text-decoration:underline;
  text-decoration-color:rgba(255,77,61,0.3);
  text-decoration-thickness:4px;
  text-underline-offset:4px;
}

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

.seo-description {
  max-width:640px;
  margin:0 auto 48px;
  text-align:center;
  opacity:0.65;
  font-size:1rem;
  line-height:1.75;
}

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

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

  .hero { padding:110px 0 56px; }
  .hero h1 { font-size:2.6rem; }
  .hero .container { flex-direction:column; }
  .hero-content { max-width:100%; }
  .hero-image { width:100%; flex:1 1 100%; }
  .hero::after { font-size:20rem; right:-5%; }

  .section-title { font-size:2rem; }
  .feature-block { grid-template-columns:1fr; gap:48px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); border:0; gap:16px; padding:24px 0; }
  .stat-item { border-left:none; border:1px solid rgba(26,24,21,0.05); border-radius:16px; padding:24px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }

  .main-nav {
    display:none;
    position:absolute;
    top:72px;
    left:0;
    width:100%;
    background:#FBF8F3;
    padding:24px;
    flex-direction:column;
    align-items:flex-start;
    gap:18px;
    border-bottom:1px solid rgba(26,24,21,0.08);
    box-shadow:0 16px 32px rgba(26,24,21,0.08);
  }

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

  .cta-banner h2 { font-size:1.8rem; }
}

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

  .hero h1 { font-size:2.1rem; }

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

  .cta-banner { padding:56px 20px; border-radius:24px; }

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