```css
/* ============================================================
   七色影视 www7757cc
   "光晕光谱" Cinema Spectrum Design System
   Awwwards 风格 · 暖白画布 + 七色光棱镜
   ============================================================ */

:root {
  /* 七色之光 */
  --cs-red:    #FF5D4D;
  --cs-orange: #FF9F43;
  --cs-yellow: #F6C445;
  --cs-green:  #46C68E;
  --cs-teal:   #00B8A9;
  --cs-blue:   #4A9DFF;
  --cs-violet: #8B6FE8;

  --prism-gradient: linear-gradient(100deg,
      #FF5D4D 0%, #FF9F43 16%, #F6C445 32%,
      #46C68E 48%, #00B8A9 64%, #4A9DFF 80%, #8B6FE8 100%);

  --prism-soft: linear-gradient(120deg,
      rgba(255,93,77,0.10), rgba(255,159,67,0.10),
      rgba(246,196,69,0.10), rgba(70,198,142,0.10),
      rgba(0,184,169,0.10), rgba(74,157,255,0.10),
      rgba(139,111,232,0.10));

  --bg-cream: #FDFBF7;
  --bg-sand:  #F4EFE6;
  --ink:      #2E2D35;
  --ink-muted: rgba(46,45,53,0.62);
  --ink-light: rgba(46,45,53,0.42);
  --card:     #FFFFFF;
  --line:     #EDE7DB;
  --line-strong: #DAD2C2;

  --radius-sm: 10px;
  --radius:    18px;
  --radius-lg: 30px;

  --shadow:       0 8px 30px rgba(90,74,48,0.07);
  --shadow-hover: 0 22px 55px rgba(90,74,48,0.14);
}

/* ========== 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(--bg-cream);
  color: var(--ink);
  line-height: 1.65;
  position: relative;
}

/* 电影颗粒噪点叠加 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.68' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
  background: var(--cs-blue);
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--cs-orange);
  outline-offset: 3px;
}

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

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

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

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

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

.section:nth-child(even)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--prism-gradient);
  opacity: 0.25;
}

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s ease;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--prism-gradient);
  opacity: 0.55;
}

.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;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: var(--prism-gradient);
  color: #fff;
  box-shadow: 0 0 22px rgba(255, 159, 67, 0.35);
  position: relative;
  flex-shrink: 0;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  border: 1.5px dashed rgba(255, 255, 255, 0.55);
  animation: spin 12s linear infinite;
}

.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-muted);
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
  position: relative;
  padding: 5px 0;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--prism-gradient);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.main-nav a:not(.nav-cta):hover {
  color: var(--ink);
}

.main-nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 9px 22px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 700;
  background: var(--prism-gradient);
  box-shadow: 0 4px 18px rgba(255, 120, 50, 0.32);
  transition: transform 0.25s ease, box-shadow 0.25s ease !important;
  background-size: 160% 100%;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 28px rgba(255, 120, 50, 0.42) !important;
  background-position: 90% 0;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: transparent;
  border: 1.5px solid var(--line-strong);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  color: var(--ink);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.menu-toggle:hover {
  background: var(--prism-soft);
  border-color: var(--cs-orange);
}

/* ========== 首页 Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--bg-cream);
  overflow: hidden;
  padding-top: 72px;
}

/* 棱镜光晕背景 */
.hero::before {
  content: '';
  position: absolute;
  top: 12%;
  right: -6%;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
      #FF5D4D, #FF9F43, #F6C445, #46C68E,
      #00B8A9, #4A9DFF, #8B6FE8, #FF5D4D);
  filter: blur(70px);
  opacity: 0.13;
  animation: spin 36s linear infinite;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 6%;
  left: -8%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: var(--prism-soft);
  filter: blur(26px);
  z-index: 0;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 60px;
  align-items: center;
  z-index: 1;
}

.hero-content {
  max-width: 680px;
  animation: fade-up 0.8s ease-out both;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  padding: 7px 18px;
  border-radius: 50px;
  margin-bottom: 22px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  box-shadow: 0 2px 12px rgba(90, 74, 48, 0.05);
  backdrop-filter: blur(8px);
}

.hero-eyebrow::before {
  content: '✦';
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 0.95rem;
}

.hero h1 {
  font-size: clamp(2.7rem, 6vw, 4.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  color: var(--ink);
}

.hero h1 .text-accent {
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.hero p {
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--ink-muted);
  max-width: 560px;
  margin-bottom: 38px;
}

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

/* Hero 视觉 —— 纯CSS棱镜装置 */
.hero-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  background: var(--prism-soft);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: conic-gradient(from 45deg,
      #FF5D4D, #FF9F43, #F6C445, #46C68E,
      #00B8A9, #4A9DFF, #8B6FE8, #FF5D4D);
  mask-image: radial-gradient(circle, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle, black 0%, transparent 70%);
  opacity: 0.82;
  animation: spin 18s linear infinite;
}

.hero-image::after {
  content: '7 光影';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(3rem, 5vw, 4.6rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.05em;
  text-shadow: 0 10px 35px rgba(50, 30, 20, 0.18);
  background: rgba(100, 70, 50, 0.06);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.hero-image img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
}

/* 用 CSS 图案做image缺失时的备选 */
.hero-image .film-note {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.75);
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(6px);
  z-index: 2;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
              background-color 0.25s ease, color 0.25s ease;
  letter-spacing: 0.01em;
  line-height: 1;
}

.btn-primary {
  background: var(--prism-gradient);
  background-size: 170% 100%;
  color: #fff;
  box-shadow: 0 6px 24px rgba(255, 140, 60, 0.35);
  transition: background-position 0.45s ease, transform 0.25s ease,
              box-shadow 0.25s ease;
}

.btn-primary:hover {
  background-position: 100% 0;
  transform: translateY(-3px);
  box-shadow: 0 14px 38px rgba(255, 140, 60, 0.48);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-outline::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--prism-gradient);
  border-radius: 50px;
  z-index: -1;
  transform: translateY(101%);
  transition: transform 0.35s ease;
}

.btn-outline:hover {
  color: #fff;
  border-color: transparent;
}

.btn-outline:hover::before {
  transform: translateY(0);
}

/* ========== 标签 / 标题 ========== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--ink-muted);
}

.section-label::before {
  content: '';
  width: 30px;
  height: 2px;
  background: var(--prism-gradient);
  border-radius: 2px;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin-bottom: 16px;
  color: var(--ink);
}

.section-desc {
  max-width: 600px;
  color: var(--ink-muted);
  opacity: 0.85;
  margin-bottom: 46px;
  font-size: 1.02rem;
  line-height: 1.85;
}

/* ========== 卡片网格 ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 26px;
}

.category-card {
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease,
              border-color 0.35s ease;
}

/* 卡片顶部分彩条 */
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--card-accent, var(--cs-blue));
  transform: scaleX(0.4);
  transform-origin: left;
  transition: transform 0.45s ease;
}

.category-card:nth-child(1) { --card-accent: var(--cs-red);    }
.category-card:nth-child(2) { --card-accent: var(--cs-orange); }
.category-card:nth-child(3) { --card-accent: var(--cs-yellow); }
.category-card:nth-child(4) { --card-accent: var(--cs-green);  }
.category-card:nth-child(5) { --card-accent: var(--cs-teal);   }
.category-card:nth-child(6) { --card-accent: var(--cs-blue);   }
.category-card:nth-child(7) { --card-accent: var(--cs-violet); }

/* 胶片边孔装饰 */
.category-card::after {
  content: '';
  position: absolute;
  top: 14px;
  bottom: 14px;
  right: 10px;
  width: 6px;
  background-image: radial-gradient(circle, var(--line-strong) 2px, transparent 2.6px);
  background-size: 100% 16px;
  background-position: center;
  opacity: 0.55;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

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

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--prism-soft);
  border: 1px solid rgba(255, 255, 255, 0.8);
  position: relative;
  box-shadow: 0 2px 8px rgba(90, 74, 48, 0.04);
}

.card-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: var(--card-accent, var(--cs-blue));
  opacity: 0.09;
}

.category-card h3 {
  font-size: 1.16rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.category-card p {
  font-size: 0.88rem;
  color: var(--ink-muted);
  line-height: 1.75;
  margin-bottom: 18px;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--card-accent, var(--cs-blue));
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.3s ease;
}

.card-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.card-link:hover {
  gap: 11px;
}

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

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 380px;
  background: var(--prism-soft);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow);
}

.feature-image::before {
  content: '';
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
      #FF5D4D, #FF9F43, #F6C445, #46C68E,
      #00B8A9, #4A9DFF, #8B6FE8, #FF5D4D);
  filter: blur(14px);
  opacity: 0.5;
  animation: spin 15s linear infinite;
}

.feature-image::after {
  content: '✦ 七色 · 光影';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: rgba(46, 45, 53, 0.24);
  text-align: center;
  line-height: 1.6;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  opacity: 0.92;
  mix-blend-mode: multiply;
  transition: opacity 0.4s ease;
}

.feature-image:hover img {
  opacity: 1;
}

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

.feature-text .section-desc {
  margin-bottom: 10px;
}

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

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.97rem;
  color: var(--ink);
  border-bottom: 1px dashed var(--line);
}

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

.feature-list li::before {
  content: '';
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--prism-gradient);
  flex-shrink: 0;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* ========== 数据条 ========== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  text-align: center;
}

.stat-item {
  padding: 34px 20px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--stat-color, var(--cs-orange));
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform 0.45s ease;
}

.stat-item:nth-child(1) { --stat-color: var(--cs-red);    }
.stat-item:nth-child(2) { --stat-color: var(--cs-orange); }
.stat-item:nth-child(3) { --stat-color: var(--cs-teal);   }
.stat-item:nth-child(4) { --stat-color: var(--cs-violet); }

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

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

.stat-number {
  font-size: clamp(2.2rem, 4.2vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  background: var(--stat-color, var(--cs-orange));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 0.89rem;
  color: var(--ink-muted);
  opacity: 0.75;
  margin-top: 8px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ========== 内容墙 ========== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--card);
  transition: transform 0.35s ease, box-shadow 0.35s ease,
              border-color 0.35s ease;
  position: relative;
}

.content-wall-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--prism-soft);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 2;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.content-wall-item:hover::after {
  opacity: 0.5;
}

.content-wall-item:hover img {
  transform: scale(1.06) rotate(0.4deg);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  z-index: 0;
  background: var(--prism-soft);
  opacity: 0.96;
}

.content-wall-body {
  padding: 22px 24px 24px;
  position: relative;
  z-index: 3;
  background: var(--card);
}

.content-wall-body .content-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 8px;
}

.content-meta span:first-child {
  color: var(--cs-blue);
}

.content-meta span + span::before {
  content: '·';
  margin-right: 12px;
  color: var(--line-strong);
}

.content-wall-body h3 {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  transition: color 0.25s ease;
}

.content-wall-item:hover h3 {
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.content-wall-body p {
  font-size: 0.86rem;
  color: var(--ink-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--card);
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--prism-gradient);
  border-radius: 0 4px 4px 0;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.faq-item:hover {
  border-color: var(--line-strong);
  box-shadow: 0 4px 18px rgba(90, 74, 48, 0.06);
}

.faq-item.open {
  border-color: #DED5C4;
  box-shadow: 0 10px 34px rgba(90, 74, 48, 0.09);
}

.faq-item.open::before {
  opacity: 1;
}

.faq-question {
  padding: 19px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.98rem;
  color: var(--ink);
}

.faq-question::after {
  content: '⌄';
  font-size: 1.1rem;
  color: var(--ink-light);
  transition: transform 0.35s ease, color 0.3s ease;
  flex-shrink: 0;
  line-height: 1;
}

.faq-item.open .faq-question::after {
  transform: rotate(180deg);
  color: var(--cs-orange);
}

.faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--ink-muted);
  font-size: 0.95rem;
  line-height: 1.85;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fade-down 0.35s ease;
}

/* ========== CTA 横幅 ========== */
.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: var(--radius-lg);
  color: #fff;
  background: var(--prism-gradient);
  background-size: 180% 100%;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 70px rgba(255, 110, 60, 0.3);
}

/* 光斑纹理 */
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.18) 2px, transparent 2.6px);
  background-size: 22px 22px;
  opacity: 0.22;
  pointer-events: none;
}

/* 装饰大7 */
.cta-banner::after {
  content: '7';
  position: absolute;
  right: 10%;
  bottom: -32%;
  font-size: 17rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.09);
  line-height: 1;
  letter-spacing: -0.06em;
  pointer-events: none;
}

.cta-banner h2 {
  position: relative;
  z-index: 1;
  color: #fff;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.88);
  max-width: 540px;
  margin: 0 auto 30px;
  font-size: 1.04rem;
  line-height: 1.75;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 64px 0 30px;
  background: var(--bg-cream);
  border-top: 1px solid var(--line);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--prism-gradient);
  opacity: 0.45;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 1.45rem;
  font-weight: 900;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.footer-brand .brand-sub {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--ink-muted);
  line-height: 1.85;
  max-width: 280px;
}

.footer-col h5 {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 18px;
}

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

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

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

.footer-col ul a:hover {
  color: var(--cs-orange);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 34px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.84rem;
  color: var(--ink-light);
}

/* ========== 工具类 ========== */
.text-accent {
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--ink-muted);
  opacity: 0.85;
  line-height: 1.85;
}

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

/* ========== 滚动文字带 ========== */
.marquee {
  position: relative;
  overflow: hidden;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-cream);
  white-space: nowrap;
}

.marquee-track {
  display: inline-flex;
  gap: 0;
  animation: marquee 30s linear infinite;
  will-change: transform;
}

.marquee-track span {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin-right: 48px;
  background: var(--prism-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.marquee-track .dot {
  color: var(--line-strong);
  -webkit-text-fill-color: var(--line-strong);
  margin-right: 48px;
}

.marquee::before,
.marquee::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 90px;
  z-index: 2;
  pointer-events: none;
}

.marquee::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-cream), transparent);
}

.marquee::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-cream), transparent);
}

/* ========== 幽灵大字 ========== */
.ghost-text {
  font-size: clamp(5rem, 13vw, 11rem);
  font-weight: 900;
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--line-strong);
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.04em;
  white-space: nowrap;
  position: absolute;
  z-index: -1;
  opacity: 0.6;
}

/* ========== 动画关键帧 ========== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-down {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 52px;
    text-align: center;
  }

  .hero-content {
    margin: 0 auto;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-image {
    max-width: 440px;
    margin: 0 auto;
    min-height: 320px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .feature-image {
    min-height: 300px;
  }

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

  .ghost-text {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 68px 0;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-cream);
    padding: 24px 28px 28px;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 50px rgba(90, 74, 48, 0.12);
    animation: fade-down 0.35s ease;
  }

  .main-nav.open a {
    font-size: 1.08rem;
    padding: 10px 0;
  }

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

  .hero {
    min-height: auto;
    padding-top: 120px;
    padding-bottom: 64px;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 7.5vw, 3.1rem);
  }

  .cta-banner {
    padding: 52px 24px;
    border-radius: 22px;
  }

  .cta-banner::after {
    font-size: 10rem;
    bottom: -22%;
  }

  .cards-grid {
    gap: 18px;
  }
}

@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;
    align-items: stretch;
  }

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

  .section {
    padding: 56px 0;
  }

  .stat-item {
    padding: 26px 16px;
  }

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

  .btn {
    padding: 15px 26px;
    font-size: 0.9rem;
  }

  .header-inner {
    height: 64px;
    padding: 0 16px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

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

  .cta-banner h2 {
    font-size: 1.7rem;
  }

  .marquee-track span {
    font-size: 0.9rem;
    margin-right: 32px;
  }

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