/* ===================================================================
   YKKCLOUD - Tokyo Neo-Pop Anime-Kinetic UI Design System
   Cyber-Pop Palette:
     - Midnight Shibuya Navy: #0b0d1e
     - Electric Pop-Cyan: #00e5ff
     - Manga Screentone Lavender: #a78bfa
     - Acid Pop Neon: #ff2a85 & #ffe600
     - Stark Comic White: #ffffff
   Avant-garde typography: Katakana ribbons, diagonal pop-slices,
   halftone screentone textures, anime-slash glints, comic-bounce physics.
   =================================================================== */

:root {
  /* 白天模式 (Default Light Mode - Vibrant Tokyo Pop Streetwear) */
  --bg-body: #f5f6fe;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f3ff;
  --bg-alt: #edf0ff;
  --border-color: #0b0d1e;
  --border-subtle: #d6dbf5;
  --border-glow: #7c3aed;

  --text-primary: #0b0d1e;
  --text-secondary: #2b3052;
  --text-muted: #5e668c;
  --text-inverse: #ffffff;

  /* 核心 Tokyo Cyber-Pop 专色 */
  --pop-cyan: #00b8d4;
  --pop-cyan-bright: #00e5ff;
  --pop-lavender: #7c3aed;
  --pop-lavender-light: #a78bfa;
  --pop-pink: #ff2a85;
  --pop-yellow: #ffdb15;
  --pop-dark: #0b0d1e;

  /* 渐变与特效背景 */
  --primary-gradient: linear-gradient(135deg, #0b0d1e 0%, #7c3aed 50%, #00b8d4 100%);
  --cyber-gradient: linear-gradient(90deg, #00e5ff 0%, #a78bfa 50%, #ff2a85 100%);
  --screentone-dot: radial-gradient(#7c3aed 1px, transparent 1px);
  --tape-bg: #ffdb15;
  --tape-color: #0b0d1e;

  /* 阴影 - 极具动漫画风的厚重硬投影 (Hard Comic Drop Shadows) */
  --comic-shadow-sm: 2px 2px 0px #0b0d1e;
  --comic-shadow: 4px 4px 0px #0b0d1e;
  --comic-shadow-lg: 8px 8px 0px #0b0d1e;
  --comic-shadow-cyan: 5px 5px 0px #00b8d4;
  --comic-shadow-lavender: 5px 5px 0px #7c3aed;

  /* 顶栏与磨砂玻璃 */
  --header-bg: rgba(255, 255, 255, 0.88);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: #0b0d1e;

  /* 形状 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  --max-width: 1220px;

  /* 过渡 */
  --transition-fast: 0.18s cubic-bezier(0.2, 0.9, 0.3, 1.2);
  --transition-normal: 0.28s ease;
}

/* 黑夜模式 (Nocturnal Cyber-Pop Midnight Shibuya) */
[data-theme="dark"] {
  --bg-body: #0b0d1e;
  --bg-surface: #10142b;
  --bg-card: #131835;
  --bg-card-hover: #192045;
  --bg-alt: #0e1227;
  --border-color: #2b3560;
  --border-subtle: #1c2445;
  --border-glow: #00e5ff;

  --text-primary: #ffffff;
  --text-secondary: #c9d2f7;
  --text-muted: #8b97c6;
  --text-inverse: #0b0d1e;

  --pop-cyan: #00e5ff;
  --pop-cyan-bright: #00f0ff;
  --pop-lavender: #a78bfa;
  --pop-lavender-light: #c4b5fd;
  --pop-pink: #ff2a85;
  --pop-yellow: #ffe600;

  --primary-gradient: linear-gradient(135deg, #00e5ff 0%, #a78bfa 50%, #ff2a85 100%);
  --screentone-dot: radial-gradient(#a78bfa 1px, transparent 1px);
  --tape-bg: #ffe600;
  --tape-color: #0b0d1e;

  --comic-shadow-sm: 2px 2px 0px #00e5ff;
  --comic-shadow: 4px 4px 0px #a78bfa;
  --comic-shadow-lg: 8px 8px 0px rgba(0, 229, 255, 0.65);
  --comic-shadow-cyan: 5px 5px 0px #00e5ff;
  --comic-shadow-lavender: 5px 5px 0px #ff2a85;

  --header-bg: rgba(11, 13, 30, 0.88);
  --glass-bg: rgba(19, 24, 53, 0.8);
  --glass-border: #2b3560;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans JP", sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* 漫画半调网点背景图层 (Manga Screentone Layer) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: var(--screentone-dot);
  background-size: 24px 24px;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* 潮流 Katakana 警示装饰带 (Tokyo Streetwear Typography Tape) */
.tape-banner {
  background: var(--tape-bg);
  color: var(--tape-color);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 6px 0;
  overflow: hidden;
  white-space: nowrap;
  border-bottom: 2px solid #0b0d1e;
  user-select: none;
  position: relative;
  z-index: 101;
}

.tape-track {
  display: inline-block;
  animation: marquee-tape 28s linear infinite;
}

@keyframes marquee-tape {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 顶部导航条 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.03) rotate(-1deg);
}

.brand-logo-img {
  height: 44px;
  width: auto;
  display: block;
  border-radius: 8px;
  border: 2px solid var(--border-color);
  box-shadow: var(--comic-shadow-sm);
  transition: all var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  box-shadow: 4px 4px 0px var(--pop-cyan);
}

/* 导航链接 - 支持平滑滚动跳转与悬停弹跳 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: all var(--transition-fast);
  letter-spacing: -0.2px;
}

.nav-links a:hover {
  color: var(--pop-cyan);
  background: var(--bg-card);
  transform: translateY(-2px);
  box-shadow: var(--comic-shadow-sm);
}

/* “推荐资讯”特殊潮流胶囊标识 */
.nav-links a.nav-badge-link {
  background: rgba(0, 229, 255, 0.12);
  border: 1px dashed var(--pop-cyan);
  color: var(--pop-cyan);
}

.nav-links a.nav-badge-link:hover {
  background: var(--pop-cyan);
  color: #0b0d1e;
  border-style: solid;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 精致通透昼夜模式切换按钮 */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  box-shadow: var(--comic-shadow-sm);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--comic-shadow);
  border-color: var(--pop-cyan);
  color: var(--pop-cyan);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
}

.sun-icon { display: block; }
.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

/* 动漫画风锋利刀芒闪光 CTA 按钮 (Anime-Slash Pill Button) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 11px 24px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--border-color);
  box-shadow: var(--comic-shadow);
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn-primary {
  background: var(--pop-cyan);
  color: #0b0d1e !important;
}

/* 动漫画风对角线破空光刃划过 (Razor-sharp anime-slash glint) */
.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.85), transparent);
  transform: rotate(35deg);
  transition: none;
  opacity: 0;
}

.btn-primary:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px var(--pop-lavender);
  background: var(--pop-cyan-bright);
}

.btn-primary:hover::after {
  animation: anime-slash 0.65s cubic-bezier(0.1, 0.85, 0.25, 1);
  opacity: 1;
}

@keyframes anime-slash {
  0% { left: -60%; opacity: 0; }
  30% { opacity: 1; }
  100% { left: 140%; opacity: 0; }
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
}

.btn-secondary:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px var(--pop-pink);
  border-color: var(--pop-pink);
  color: var(--pop-pink);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

/* ===================================================================
   Hero 主视觉区 (Tokyo Streetwear Poster Layout)
   =================================================================== */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero-glow-fx {
  position: absolute;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 420px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.18) 0%, rgba(167, 139, 250, 0.12) 40%, transparent 70%);
  filter: blur(70px);
  z-index: 0;
  pointer-events: none;
}

/* 赛博日文字符边框装饰带 */
.hero-katakana-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  box-shadow: var(--comic-shadow-sm);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--pop-lavender);
  margin-bottom: 24px;
}

.hero-katakana-tag .dot-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #00e5ff;
  box-shadow: 0 0 10px #00e5ff;
  animation: comic-bounce 1.6s infinite alternate cubic-bezier(0.3, 1.8, 0.5, 0.9);
}

@keyframes comic-bounce {
  0% { transform: scale(0.8); }
  100% { transform: scale(1.35); }
}

.hero-title-box {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  color: var(--text-primary);
  text-transform: uppercase;
}

.hero-title-brand {
  display: inline-block;
  background: var(--cyber-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 28px rgba(0, 229, 255, 0.3);
  position: relative;
}

.hero-title-brand::after {
  content: "⚡ OFFICIAL";
  position: absolute;
  top: -12px;
  right: -58px;
  font-size: 0.65rem;
  font-weight: 900;
  background: var(--pop-pink);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #0b0d1e;
  -webkit-text-fill-color: #ffffff;
  transform: rotate(8deg);
  box-shadow: 2px 2px 0px #0b0d1e;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* 动漫画风高反差服务器状态面板 (Modular Smoked-Glass Panel) */
.hero-stats-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 940px;
  margin: 0 auto;
  padding: 20px;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--comic-shadow-lg);
}

.stat-box {
  padding: 16px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border-subtle);
  text-align: center;
  position: relative;
  transition: all var(--transition-fast);
}

.stat-box:hover {
  transform: translateY(-4px);
  border-color: var(--pop-cyan);
  box-shadow: var(--comic-shadow-cyan);
}

.stat-number {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.1;
  color: var(--pop-cyan);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-top: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

/* 区域通用标题 (Tokyo Neo-Pop Section Header) */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 54px;
}

.section-katakana-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 2px;
  padding: 4px 12px;
  background: var(--pop-yellow);
  color: #0b0d1e;
  border: 1.5px solid #0b0d1e;
  border-radius: var(--radius-sm);
  box-shadow: 2px 2px 0px #0b0d1e;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ===================================================================
   核心优势卡片 (Dynamic Pop-Slice Micro-Interactions)
   扫过卡片触发对角线色散切片与复古半调网点微交互
   =================================================================== */
.features-section {
  padding: 80px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--comic-shadow);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

/* 对角线切片背景与半调纹理 (Pop-Slice Overlay) */
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15) 0%, rgba(167, 139, 250, 0.18) 50%, rgba(255, 42, 133, 0.15) 100%);
  transform: skewX(-16deg);
  transition: transform 0.45s cubic-bezier(0.1, 0.9, 0.2, 1.2), left 0.45s ease;
  pointer-events: none;
  z-index: 0;
}

.feature-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--comic-shadow-lg);
  border-color: var(--pop-cyan);
}

.feature-card:hover::before {
  left: 20%;
}

.feature-card-content {
  position: relative;
  z-index: 1;
}

.feature-icon-badge {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 2px solid var(--border-color);
  box-shadow: var(--comic-shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--pop-cyan);
  transition: all var(--transition-fast);
}

.feature-card:hover .feature-icon-badge {
  background: var(--pop-cyan);
  color: #0b0d1e;
  transform: rotate(-6deg) scale(1.08);
}

.feature-icon-badge svg {
  width: 32px;
  height: 32px;
}

.feature-card-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
}

.feature-pill-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-pill-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.feature-pill-item svg {
  width: 16px;
  height: 16px;
  color: var(--pop-cyan);
  flex-shrink: 0;
}

/* ===================================================================
   流媒体图卡 & AI 支持图卡 双列特色专区
   =================================================================== */
.services-section {
  padding: 80px 0;
  background: var(--bg-alt);
  border-top: 2px solid var(--border-color);
  border-bottom: 2px solid var(--border-color);
  position: relative;
}

.specialty-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.specialty-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 42px 36px;
  box-shadow: var(--comic-shadow);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.specialty-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--comic-shadow-lg);
}

.specialty-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 1.5px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--border-color);
  margin-bottom: 16px;
}

.tag-stream {
  background: #ff2a85;
  color: #ffffff;
  box-shadow: 2px 2px 0px #0b0d1e;
}

.tag-ai {
  background: #00e5ff;
  color: #0b0d1e;
  box-shadow: 2px 2px 0px #0b0d1e;
}

.specialty-title {
  font-size: 1.7rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.specialty-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

/* 动漫画风格子矩阵 */
.chips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.chip-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-body);
  border: 1.5px solid var(--border-color);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: var(--comic-shadow-sm);
  transition: all var(--transition-fast);
}

.chip-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--comic-shadow);
  border-color: var(--pop-cyan);
}

.chip-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.specialty-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1.5px dashed var(--border-subtle);
  font-size: 0.9rem;
  font-weight: 700;
}

/* ===================================================================
   套餐价格对比表 (参考网上主流真实套餐价格体系)
   =================================================================== */
.pricing-section {
  padding: 90px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--comic-shadow);
  transition: all var(--transition-fast);
  position: relative;
}

.pricing-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--comic-shadow-lg);
  border-color: var(--pop-lavender);
}

/* 热门套餐高亮推荐 */
.pricing-card.featured {
  border: 3px solid var(--pop-cyan);
  box-shadow: 6px 6px 0px var(--pop-cyan);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translate(-4px, -4px);
  box-shadow: 10px 10px 0px var(--pop-lavender);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pop-pink);
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 1px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 2px solid #0b0d1e;
  box-shadow: 3px 3px 0px #0b0d1e;
  white-space: nowrap;
}

.plan-tier-name {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-tier-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 42px;
  margin-bottom: 20px;
  line-height: 1.5;
}

.plan-price-block {
  padding-bottom: 20px;
  border-bottom: 2px dashed var(--border-subtle);
  margin-bottom: 22px;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--pop-cyan);
}

.plan-amount {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
}

.plan-cycle {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.plan-feature-row svg {
  width: 17px;
  height: 17px;
  color: #10b981;
  flex-shrink: 0;
}

/* ===================================================================
   用户评价 (User Testimonials)
   =================================================================== */
.reviews-section {
  padding: 80px 0;
  background: var(--bg-alt);
  border-top: 2px solid var(--border-color);
  border-bottom: 2px solid var(--border-color);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--comic-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--comic-shadow-lg);
  border-color: var(--pop-cyan);
}

.review-stars {
  color: var(--pop-yellow);
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.review-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: normal;
}

.review-user-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1.5px dashed var(--border-subtle);
  padding-top: 16px;
}

.avatar-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--pop-cyan);
  border: 2px solid var(--border-color);
  color: #0b0d1e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.05rem;
  box-shadow: 2px 2px 0px #0b0d1e;
}

.author-title h4 {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-primary);
}

.author-title span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */
.faq-section {
  padding: 90px 0;
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--comic-shadow-sm);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--pop-cyan);
  box-shadow: var(--comic-shadow);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.faq-icon {
  width: 22px;
  height: 22px;
  color: var(--pop-lavender);
  transition: transform 0.3s cubic-bezier(0.2, 0.9, 0.3, 1.2);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--pop-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 24px 22px 24px;
}

/* 底部行动呼吁横幅 */
.cta-banner-section {
  padding: 75px 0;
  background: var(--primary-gradient);
  border-top: 2px solid var(--border-color);
  border-bottom: 2px solid var(--border-color);
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 14px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
}

.cta-banner-desc {
  font-size: 1.15rem;
  opacity: 0.95;
  max-width: 680px;
  margin: 0 auto 32px;
}

.btn-white {
  background: #ffffff;
  color: #0b0d1e !important;
  font-size: 1.08rem;
  font-weight: 900;
  box-shadow: 5px 5px 0px #0b0d1e;
}

.btn-white:hover {
  background: var(--pop-yellow);
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0px #0b0d1e;
}

/* ===================================================================
   规范页脚：按要求严格只保留四个标题，在新页面打开展示
   =================================================================== */
.site-footer {
  background: var(--bg-surface);
  border-top: 2px solid var(--border-color);
  padding: 42px 0 32px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-link {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: var(--pop-cyan);
  background: var(--bg-card);
  border-color: var(--border-color);
  box-shadow: var(--comic-shadow-sm);
  transform: translateY(-2px);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===================================================================
   子页面与文章专属排版 (资讯、关于我们、条款等)
   =================================================================== */
.subpage-header {
  padding: 60px 0 35px;
  text-align: center;
  border-bottom: 2px solid var(--border-color);
  background: var(--bg-alt);
}

.subpage-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.subpage-subtitle {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.subpage-content {
  padding: 55px 0 85px;
  max-width: 880px;
  margin: 0 auto;
}

.article-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  box-shadow: var(--comic-shadow-lg);
}

.article-card h2 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-top: 34px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--pop-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-card h2:first-of-type {
  margin-top: 0;
}

.article-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-card ul {
  list-style: square;
  padding-left: 24px;
  margin-bottom: 24px;
}

.article-card li {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 10px;
}

.back-home-bar {
  margin-top: 36px;
  text-align: center;
}

/* ===================================================================
   深度科普长文章专属排版组件 (TOC, Tables, Callouts, Article FAQs)
   =================================================================== */
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--bg-alt);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 28px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-muted);
}

.article-meta-tag {
  background: var(--pop-cyan);
  color: #0b0d1e;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.5px;
}

/* 动漫画风文章目录 (TOC) */
.article-toc {
  background: var(--bg-alt);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 28px 0 36px;
  box-shadow: var(--comic-shadow-sm);
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc ol {
  list-style: decimal;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc li a {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.article-toc li a:hover {
  color: var(--pop-cyan);
  text-decoration: underline;
}

/* 漫画风先锋对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0 30px;
  -webkit-overflow-scrolling: touch;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  box-shadow: var(--comic-shadow-sm);
}

.article-table th {
  background: var(--bg-alt);
  color: var(--text-primary);
  font-weight: 900;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
  white-space: nowrap;
}

.article-table td {
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-table tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .article-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

/* 醒目引用与提示框 (Callouts) */
.article-callout {
  border-left: 4px solid var(--pop-cyan);
  background: var(--bg-alt);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-size: 0.96rem;
  line-height: 1.7;
}

.article-callout-warning {
  border-left-color: var(--pop-pink);
}

.article-callout strong {
  color: var(--text-primary);
}

/* 文章内的专属 FAQ 列表 */
.article-faq-box {
  margin: 36px 0 24px;
  padding: 24px 28px;
  background: var(--bg-alt);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--comic-shadow-sm);
}

.article-faq-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-item {
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-subtle);
}

.article-faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.article-faq-q {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.article-faq-q::before {
  content: "Q.";
  color: var(--pop-cyan);
  font-weight: 900;
}

.article-faq-a {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 24px;
}

/* 相关阅读网格 (Related Articles Grid) */
.article-related-box {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 2px solid var(--border-color);
}

.article-related-title {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.article-related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.related-card {
  display: block;
  padding: 16px 20px;
  background: var(--bg-alt);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.related-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--pop-cyan);
  box-shadow: var(--comic-shadow-sm);
}

.related-card-tag {
  font-size: 0.74rem;
  font-weight: 800;
  color: var(--pop-lavender);
  display: block;
  margin-bottom: 4px;
}

.related-card-title {
  font-size: 0.94rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.45;
}

@media screen and (max-width: 768px) {
  .article-related-grid {
    grid-template-columns: 1fr;
  }
}

/* 推荐资讯卡片列表 */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 24px;
}

.insight-item {
  background: var(--bg-alt);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--comic-shadow-sm);
  transition: all var(--transition-fast);
}

.insight-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--comic-shadow);
  border-color: var(--pop-cyan);
}

.insight-date {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--pop-lavender);
  letter-spacing: 1px;
  margin-bottom: 6px;
  display: block;
}

.insight-title {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.insight-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

/* ===================================================================
   响应式断点适配 (@media)
   =================================================================== */
@media screen and (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translate(-4px, -4px);
  }
}

@media screen and (max-width: 768px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .nav-links {
    display: none; /* 移动端精简顶部导航，聚焦CTA与昼夜切换 */
  }

  .brand-logo-img {
    height: 36px;
    max-width: 140px;
  }

  .hero-section {
    padding: 50px 0 35px;
  }

  .hero-title {
    font-size: 2.1rem;
    letter-spacing: -0.5px;
  }

  .hero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 28px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
  }

  .hero-stats-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 14px;
  }

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

  .section-title {
    font-size: 1.75rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .specialty-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .specialty-card {
    padding: 28px 22px;
  }

  .chips-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .pricing-card {
    padding: 30px 20px;
  }

  .pricing-card .btn {
    min-height: 48px;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .faq-question {
    padding: 18px;
    font-size: 0.98rem;
  }

  .faq-answer {
    padding: 0 18px;
  }

  .faq-item.active .faq-answer {
    padding: 0 18px 18px 18px;
  }

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

  .cta-banner-section .btn {
    width: 100%;
    min-height: 48px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }

  .footer-link {
    padding: 8px 14px;
  }

  .article-card {
    padding: 26px 20px;
  }

  .subpage-title {
    font-size: 1.85rem;
  }
}