/* ===== Talai v2 - 蓝紫科技风 + 玻璃拟态 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #4834D4;
  --accent: #00CEC9;
  --accent-light: #81ECEC;
  --neon-purple: #9B59B6;
  --gradient: linear-gradient(135deg, #6C5CE7 0%, #00CEC9 100%);
  --gradient-vertical: linear-gradient(180deg, #6C5CE7 0%, #00CEC9 100%);
  --gradient-text: linear-gradient(135deg, #A29BFE 0%, #81ECEC 100%);
  --bg: #0A0A14;
  --bg-deep: #060610;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.08);
  --text: #FFFFFF;
  --text-main: #E8E8F0;
  --text-light: #9898B0;
  --text-muted: #606078;
  --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius: 20px;
  --radius-sm: 12px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* 动态渐变背景 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 800px 600px at 10% 10%, rgba(108, 92, 231, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 600px 500px at 90% 30%, rgba(0, 206, 201, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse 700px 600px at 50% 90%, rgba(155, 89, 182, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.1) translate(-2%, -2%); }
}

/* 粒子效果容器 */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary-light);
  border-radius: 50%;
  opacity: 0.3;
  animation: floatParticle 15s linear infinite;
}

@keyframes floatParticle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 0.3; }
  90% { opacity: 0.3; }
  100% { transform: translateY(-100vh) rotate(720deg); opacity: 0; }
}

a {
  text-decoration: none;
  color: inherit;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

/* ===== 玻璃拟态导航栏 ===== */
.navbar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 64px);
  max-width: 1200px;
  z-index: 1000;
  background: rgba(10, 10, 20, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  transition: var(--transition);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.navbar.scrolled {
  top: 12px;
  background: rgba(10, 10, 20, 0.85);
  box-shadow: 0 8px 40px rgba(108, 92, 231, 0.15);
}

.nav-inner {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-logo img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.nav-logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  padding: 8px 16px;
  border-radius: 50px;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.nav-download {
  background: var(--gradient) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 50px !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
  transition: var(--transition);
}

.nav-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(108, 92, 231, 0.5) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero区 - 分屏布局 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 64px;
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 24px;
  letter-spacing: -2px;
}

.hero h1 .line1 {
  display: block;
  color: var(--text);
}

.hero h1 .line2 {
  display: block;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 36px;
  line-height: 1.8;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient);
  color: #fff;
  padding: 16px 36px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 8px 30px rgba(108, 92, 231, 0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(108, 92, 231, 0.5);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-glass);
  color: var(--text);
  padding: 16px 36px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary-light);
  transform: translateY(-3px);
}

/* 数据统计 */
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero右侧 - 手机展示 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-wrap {
  position: relative;
  width: 320px;
  height: 640px;
}

.phone-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  background: var(--gradient);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.1); }
}

.phone-frame {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, #1a1a2e, #0f0f1a);
  border-radius: 44px;
  padding: 14px;
  box-shadow:
    0 25px 60px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.phone-notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: #000;
  border-radius: 0 0 18px 18px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 32px;
  overflow: hidden;
  position: relative;
  background: #000;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 浮动标签 */
.float-tag {
  position: absolute;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  padding: 12px 20px;
  border-radius: 14px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-card);
  animation: floatTag 3s ease-in-out infinite;
  z-index: 3;
}

.float-tag .tag-icon {
  margin-right: 8px;
}

.float-tag-1 {
  top: 80px;
  left: -40px;
  color: var(--accent-light);
  animation-delay: 0s;
}

.float-tag-2 {
  bottom: 120px;
  right: -40px;
  color: var(--primary-light);
  animation-delay: 1.5s;
}

.float-tag-3 {
  top: 50%;
  right: -60px;
  color: #fff;
  animation-delay: 0.8s;
}

@keyframes floatTag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ===== 通用区块 ===== */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.section-title {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -1px;
  color: var(--text);
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 功能展示 - 玻璃拟态大卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 40px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: 0 20px 50px rgba(108, 92, 231, 0.15);
}

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

.feature-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 24px;
  background: var(--gradient);
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.3);
}

.feature-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.feature-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.feature-tag {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.15);
  color: var(--primary-light);
  font-weight: 500;
}

/* ===== 特色展示 - 左右交替 ===== */
.showcase {
  padding: 100px 0;
}

.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}

.showcase-item:last-child {
  margin-bottom: 0;
}

.showcase-item.reverse .showcase-visual {
  order: 2;
}

.showcase-item.reverse .showcase-content {
  order: 1;
}

.showcase-visual {
  position: relative;
}

.showcase-img-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass);
}

.showcase-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

.showcase-img-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(0, 206, 201, 0.05));
  pointer-events: none;
}

.showcase-content .num {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.showcase-content h3 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.5px;
}

.showcase-content p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

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

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-main);
}

.showcase-list li::before {
  content: '✓';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  font-weight: bold;
  margin-top: 2px;
}

/* ===== 截图展示 - 大图+缩略图 ===== */
.screenshots-section {
  background: linear-gradient(180deg, transparent, rgba(108, 92, 231, 0.03), transparent);
}

.screenshots-main {
  position: relative;
  max-width: 900px;
  margin: 0 auto 40px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass);
}

.screenshots-main img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.4s;
}

.screenshots-thumbs {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.thumb-item {
  width: 140px;
  height: 240px;
  border-radius: 14px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  opacity: 0.6;
}

.thumb-item:hover,
.thumb-item.active {
  opacity: 1;
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(108, 92, 231, 0.3);
}

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 分类标签云 ===== */
.categories-wrap {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.category-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 92, 231, 0.4);
  background: rgba(108, 92, 231, 0.08);
}

.category-emoji {
  font-size: 32px;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--gradient);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-info h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.category-info p {
  font-size: 13px;
  color: var(--text-muted);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.cloud-tag {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 14px;
  color: var(--text-light);
  transition: var(--transition);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.cloud-tag:hover {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.3);
}

/* ===== 更新日志 - 横向时间线 ===== */
.timeline-horizontal {
  display: flex;
  gap: 0;
  position: relative;
  overflow-x: auto;
  padding: 20px 0 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) transparent;
}

.timeline-horizontal::-webkit-scrollbar {
  height: 6px;
}

.timeline-horizontal::-webkit-scrollbar-track {
  background: var(--bg-card);
  border-radius: 3px;
}

.timeline-horizontal::-webkit-scrollbar-thumb {
  background: var(--gradient);
  border-radius: 3px;
}

.tl-item {
  flex: 0 0 320px;
  padding: 0 20px;
  position: relative;
}

.tl-dot {
  width: 16px;
  height: 16px;
  background: var(--gradient);
  border-radius: 50%;
  margin: 0 auto 20px;
  box-shadow: 0 0 20px rgba(108, 92, 231, 0.5);
  position: relative;
  z-index: 2;
}

.tl-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: var(--transition);
}

.tl-card:hover {
  border-color: rgba(108, 92, 231, 0.3);
  transform: translateY(-4px);
}

.tl-version {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.tl-ver {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tl-date {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: 50px;
}

.tl-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== 用户评价 - 横向滚动 ===== */
.reviews-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 10px 0 30px;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) transparent;
}

.reviews-scroll::-webkit-scrollbar {
  height: 6px;
}

.reviews-scroll::-webkit-scrollbar-track {
  background: var(--bg-card);
  border-radius: 3px;
}

.reviews-scroll::-webkit-scrollbar-thumb {
  background: var(--gradient);
  border-radius: 3px;
}

.review-card {
  flex: 0 0 360px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 92, 231, 0.3);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.review-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.review-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.review-stars {
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== FAQ - 玻璃拟态手风琴 ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: rgba(108, 92, 231, 0.4);
  background: rgba(108, 92, 231, 0.06);
}

.faq-question {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  color: var(--text);
}

.faq-question:hover {
  color: var(--primary-light);
}

.faq-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: bold;
  transition: var(--transition);
  color: var(--primary-light);
}

.faq-item.active .faq-icon {
  background: var(--gradient);
  color: #fff;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 600px;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
}

/* ===== CTA - 全屏渐变 ===== */
.cta-section {
  padding: 120px 0;
  position: relative;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient);
  opacity: 0.15;
}

.cta-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: rgba(255, 255, 255, 0.05);
  transform: rotate(15deg);
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-section h2 {
  font-size: 48px;
  font-weight: 900;
  margin-bottom: 20px;
  color: var(--text);
  letter-spacing: -1px;
  line-height: 1.2;
}

.cta-section h2 span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-section p {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--gradient);
  color: #fff;
  padding: 20px 48px;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 0 12px 40px rgba(108, 92, 231, 0.4);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.cta-btn:hover::before {
  left: 100%;
}

.cta-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(108, 92, 231, 0.5);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-deep);
  color: var(--text-muted);
  padding: 60px 0 30px;
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
}

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

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  margin-bottom: 16px;
}

.footer-brand h3 {
  color: var(--text);
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.9;
  max-width: 320px;
}

.footer-col h4 {
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

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

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-light);
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--primary-light);
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 52px;
  height: 52px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(108, 92, 231, 0.4);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 32px rgba(108, 92, 231, 0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 48px;
  }

  .hero-grid {
    gap: 40px;
  }

  .showcase-item {
    gap: 48px;
  }

  .showcase-content h3 {
    font-size: 28px;
  }
}

@media (max-width: 968px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 20, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    border-radius: 20px;
    border: 1px solid var(--border-glass);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-visual {
    order: -1;
    margin-bottom: 20px;
  }

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

  .hero-actions, .hero-stats {
    justify-content: center;
  }

  .features-grid, .category-cards {
    grid-template-columns: 1fr;
  }

  .showcase-item,
  .showcase-item.reverse {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .showcase-item.reverse .showcase-visual {
    order: 0;
  }

  .showcase-item.reverse .showcase-content {
    order: 0;
  }

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

  .section-title {
    font-size: 34px;
  }

  .cta-section h2 {
    font-size: 36px;
  }

  .float-tag-3 {
    display: none;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 20px;
  }

  .navbar {
    width: calc(100% - 32px);
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 38px;
    letter-spacing: -1px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .feature-card {
    padding: 28px;
  }

  .phone-wrap {
    width: 260px;
    height: 520px;
  }

  .float-tag {
    display: none;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-num {
    font-size: 26px;
  }

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

  .cta-section h2 {
    font-size: 30px;
  }

  .cta-btn {
    padding: 16px 36px;
    font-size: 16px;
  }

  .thumb-item {
    width: 100px;
    height: 180px;
  }

  .tl-item {
    flex: 0 0 280px;
  }

  .review-card {
    flex: 0 0 300px;
  }
}