/* ==========================================================================
   蓝帆云 (BlueSail Cloud · lanfanyun.sbs)
   Glacial Blue-and-White Minimalist UI · Cold-Luxury Architecture
   纯原生 CSS · 冰川极简冷奢主义 · 零重型依赖 · 秒开级加载
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 冰川冷奢色彩与设计变量 (CSS Variables)
   -------------------------------------------------------------------------- */
:root {
  /* 冰川雪白与深海极光色系 (Light Mode - 默认) */
  --canvas-bg: #f7f9fc;
  --ocean-abyss: #0a369d;
  --ocean-deep: #072366;
  --ocean-primary: #1255cc;
  --glacial-cyan: #0284c7;
  --glacial-ice: #38bdf8;
  --glacial-glow: #e0f2fe;
  --ice-frost-white: rgba(255, 255, 255, 0.78);
  --ice-frost-solid: #ffffff;
  
  /* 棱镜折射边框与环境高光 */
  --prism-border: rgba(255, 255, 255, 0.85);
  --prism-border-subtle: rgba(186, 230, 253, 0.45);
  --prism-highlight: rgba(56, 189, 248, 0.35);
  --prism-edge-glow: 0 0 20px rgba(56, 189, 248, 0.18);
  
  /* 阴影层级 */
  --shadow-ice-shelf: 0 16px 40px -10px rgba(10, 54, 157, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.9), inset 0 1px 2px rgba(255, 255, 255, 1);
  --shadow-ice-hover: 0 24px 50px -12px rgba(10, 54, 157, 0.16), 0 0 0 1px rgba(56, 189, 248, 0.4), inset 0 1px 2px rgba(255, 255, 255, 1);
  --shadow-crystal: 0 8px 24px -4px rgba(10, 54, 157, 0.06);

  /* 文字排版色彩 */
  --text-main: #0c182d;
  --text-secondary: #334767;
  --text-muted: #5e7394;
  --text-ice: #0284c7;
  --text-on-ocean: #ffffff;

  /* 渐变流体定义 */
  --ocean-gradient: linear-gradient(135deg, #0a369d 0%, #0284c7 60%, #38bdf8 100%);
  --liquid-flow-gradient: linear-gradient(90deg, #0a369d, #38bdf8, #00f2fe, #0a369d);
  --ice-shelf-card-bg: rgba(255, 255, 255, 0.75);
  --nav-frost-bg: rgba(247, 249, 252, 0.82);

  /* 尺寸与圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --radius-full: 9999px;
  --max-width: 1240px;

  /* 物理动效 */
  --ease-cryo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s var(--ease-cryo);
  --transition-fast: 0.18s ease;
}

/* 昼夜模式切换 - 深海冰渊黑夜模式 (Dark Mode) */
[data-theme="dark"] {
  --canvas-bg: #040914;
  --ocean-abyss: #38bdf8;
  --ocean-deep: #06152d;
  --ocean-primary: #38bdf8;
  --glacial-cyan: #38bdf8;
  --glacial-ice: #7dd3fc;
  --glacial-glow: rgba(56, 189, 248, 0.15);
  --ice-frost-white: rgba(10, 24, 48, 0.75);
  --ice-frost-solid: #0b1a33;

  --prism-border: rgba(255, 255, 255, 0.12);
  --prism-border-subtle: rgba(56, 189, 248, 0.2);
  --prism-highlight: rgba(56, 189, 248, 0.45);
  --prism-edge-glow: 0 0 25px rgba(56, 189, 248, 0.25);

  --shadow-ice-shelf: 0 20px 48px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.08), inset 0 1px 1px rgba(255, 255, 255, 0.15);
  --shadow-ice-hover: 0 28px 60px -14px rgba(56, 189, 248, 0.25), 0 0 0 1px rgba(56, 189, 248, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.25);
  --shadow-crystal: 0 8px 24px -4px rgba(0, 0, 0, 0.5);

  --text-main: #f0f6fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-ice: #38bdf8;
  --text-on-ocean: #040914;

  --ocean-gradient: linear-gradient(135deg, #38bdf8 0%, #0284c7 50%, #0a369d 100%);
  --ice-shelf-card-bg: rgba(10, 24, 48, 0.72);
  --nav-frost-bg: rgba(4, 9, 20, 0.85);
}

/* --------------------------------------------------------------------------
   2. 基础重置与深海波流画布背景 (Canvas & Base)
   -------------------------------------------------------------------------- */
*, *::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", sans-serif;
  background-color: var(--canvas-bg);
  color: var(--text-main);
  line-height: 1.68;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* 深海慢速波流底蕴层 (Ambient Ocean Currents) */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 90% 60% at 50% -15%, rgba(56, 189, 248, 0.12) 0%, transparent 75%),
    radial-gradient(circle 500px at 15% 35%, rgba(10, 54, 157, 0.05) 0%, transparent 70%),
    radial-gradient(circle 650px at 85% 75%, rgba(2, 132, 199, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: -2;
}

[data-theme="dark"] body::before {
  background: 
    radial-gradient(ellipse 90% 60% at 50% -15%, rgba(56, 189, 248, 0.16) 0%, transparent 75%),
    radial-gradient(circle 600px at 15% 40%, rgba(10, 54, 157, 0.28) 0%, transparent 70%),
    radial-gradient(circle 700px at 85% 80%, rgba(2, 132, 199, 0.2) 0%, transparent 70%);
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --------------------------------------------------------------------------
   3. 冰川浮架导航栏 (Glacial Frost-Ice Header & Navbar)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-frost-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--prism-border-subtle);
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

/* 品牌标识 (BlueSail Cloud / 蓝帆云) */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  user-select: none;
}

.brand-icon-crystal {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--ocean-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(10, 54, 157, 0.35);
  position: relative;
  overflow: hidden;
}

.brand-icon-crystal::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, transparent 50%);
  pointer-events: none;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: contain;
  box-shadow: 0 4px 14px rgba(10, 54, 157, 0.28);
  flex-shrink: 0;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.06);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.4);
}

.brand-title-box {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title-box .title-main {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--ocean-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-title-box .title-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 导航目录：首页 + 各板块 + 推荐资讯新入口 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 4px;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--glacial-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--glacial-ice);
  border-radius: 2px;
  transition: width var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* 推荐资讯特别高光入口 */
.nav-link-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--prism-highlight);
  color: var(--text-ice) !important;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
}

.nav-link-badge:hover {
  background: rgba(56, 189, 248, 0.22);
  transform: translateY(-1px);
}

.nav-link-badge .dot-glow {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--glacial-ice);
  box-shadow: 0 0 6px var(--glacial-ice);
}

/* 导航右侧操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 精致毛玻璃昼夜模式切换按钮 */
.theme-toggle-btn {
  background: var(--ice-frost-white);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-crystal);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.theme-toggle-btn:hover {
  border-color: var(--glacial-ice);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.25);
}

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
  position: absolute;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

.theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
  color: #f59e0b;
}

.theme-icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: var(--text-secondary);
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.6);
}

/* 冰川冷奢 CTA 按钮 */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.94rem;
  background: var(--ocean-gradient);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  box-shadow: 0 8px 24px -4px rgba(10, 54, 157, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  white-space: nowrap;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(10, 54, 157, 0.45);
  filter: brightness(1.06);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.94rem;
  background: var(--ice-frost-white);
  color: var(--text-main);
  border: 1px solid var(--prism-border);
  box-shadow: var(--shadow-crystal);
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--glacial-ice);
  color: var(--glacial-cyan);
  transform: translateY(-2px);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   4. 主视觉区 (Hero Section - 冰川极简冷奢)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  padding: 70px 0 60px;
  overflow: hidden;
}

.hero-frost-ambient {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22) 0%, rgba(10, 54, 157, 0.12) 40%, transparent 72%);
  pointer-events: none;
  z-index: 0;
  filter: blur(50px);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 940px;
  margin: 0 auto;
}

/* 极地冰川状态标签 */
.hero-badge-cryo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  background: var(--ice-frost-white);
  border: 1px solid var(--prism-highlight);
  box-shadow: var(--shadow-crystal), inset 0 1px 1px rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(14px);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-ice);
  margin-bottom: 26px;
}

.pulse-crystal {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--glacial-ice);
  box-shadow: 0 0 10px var(--glacial-ice);
  animation: pulseIce 2.4s infinite;
}

@keyframes pulseIce {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.8); }
  70% { transform: scale(1.2); box-shadow: 0 0 0 10px rgba(56, 189, 248, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

/* 包含品牌名的大标题与简介说明 */
.hero-headline {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin-bottom: 20px;
  color: var(--text-main);
}

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

/* 详细简介 */
.hero-intro {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 34px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 46px;
  flex-wrap: wrap;
}

.hero-buttons .btn-cta {
  padding: 14px 34px;
  font-size: 1.05rem;
}

.hero-buttons .btn-secondary {
  padding: 14px 30px;
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   5. 冰川光纤吞吐与动态流体监测模块 (Liquid Pipeline & Bento Live Status)
   -------------------------------------------------------------------------- */
.bento-pipeline-box {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 24px 28px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(24px) saturate(190%);
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 20px;
  align-items: center;
  text-align: left;
}

.pipeline-live-stream {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stream-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 冰白光纤管道内的蓝色液体脉冲流动 */
.liquid-fiber-bar {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(186, 230, 253, 0.4);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.liquid-fiber-pulse {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, transparent, var(--glacial-ice), var(--ocean-primary), transparent);
  animation: liquidFlow 2s linear infinite;
  box-shadow: 0 0 10px var(--glacial-ice);
}

@keyframes liquidFlow {
  0% { left: -50%; }
  100% { left: 100%; }
}

.bento-stat-item {
  border-left: 1px solid var(--prism-border-subtle);
  padding-left: 18px;
}

.bento-stat-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.bento-stat-val.val-cyan {
  color: var(--glacial-cyan);
}

.bento-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   6. 通用板块结构与冰架 Bento 布局规范
   -------------------------------------------------------------------------- */
.section {
  padding: 88px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag-cryo {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--glacial-cyan);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--prism-highlight);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.5rem);
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   7. 核心优势：冰架 Bento 卡片 (3 Core Features)
   -------------------------------------------------------------------------- */
.bento-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.bento-feature-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 38px 30px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(20px) saturate(180%);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

/* 冰川棱镜折射边缘高光 */
.bento-feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--glacial-ice), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.bento-feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-ice-hover);
  border-color: var(--glacial-ice);
}

.bento-feature-card:hover::before {
  opacity: 1;
}

.cryo-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--prism-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--glacial-cyan);
  margin-bottom: 24px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.15);
}

.cryo-icon-box svg {
  width: 26px;
  height: 26px;
}

.bento-feature-card h3 {
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.bento-feature-card p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-pill-list {
  list-style: none;
  padding-top: 18px;
  border-top: 1px solid var(--prism-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-pill-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

.feature-pill-list li svg {
  color: #10b981;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   8. 场景图卡：流媒体图卡 & AI 支持图卡 (低温微交互与低延迟读数)
   -------------------------------------------------------------------------- */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.cryo-scenario-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 42px 36px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(24px) saturate(190%);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.cryo-scenario-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-ice-hover);
}

.scenario-header-flex {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.scenario-icon-crystal {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-streaming-ice {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #ef4444;
}

.icon-ai-ice {
  background: rgba(10, 54, 157, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--ocean-primary);
}

.scenario-header-flex h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
}

.scenario-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 26px;
}

.matrix-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.crystal-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  background: var(--ice-frost-white);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  box-shadow: var(--shadow-crystal);
  transition: all var(--transition-fast);
}

.crystal-tag:hover {
  border-color: var(--glacial-ice);
  transform: translateY(-2px);
  color: var(--glacial-cyan);
}

.crystal-tag svg {
  width: 14px;
  height: 14px;
}

/* 低温节点微交互状态条 (Dissolving Frost Effect) */
.node-cryo-panel {
  background: rgba(247, 249, 252, 0.6);
  border: 1px solid var(--prism-border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

[data-theme="dark"] .node-cryo-panel {
  background: rgba(6, 21, 45, 0.6);
}

.node-cryo-panel:hover {
  border-color: var(--glacial-ice);
  background: rgba(56, 189, 248, 0.08);
}

.node-pulse-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-dot-live {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.node-info-text {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.node-info-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.node-ping-readout {
  font-size: 1.15rem;
  font-weight: 800;
  color: #10b981;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* --------------------------------------------------------------------------
   9. 套餐价格表 (参考网上真实机场/代理套餐真实价格与规格)
   -------------------------------------------------------------------------- */
.pricing-ice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-bento-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 42px 32px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(24px) saturate(190%);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.pricing-bento-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-ice-hover);
}

/* 站长推荐高亮冰架 */
.pricing-bento-card.popular-tier {
  border: 2px solid var(--ocean-primary);
  box-shadow: 0 20px 48px -10px rgba(10, 54, 157, 0.22);
}

.popular-ice-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ocean-gradient);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 16px rgba(10, 54, 157, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.pricing-header-wrap {
  text-align: center;
  margin-bottom: 24px;
}

.tier-title {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.tier-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.tier-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin: 18px 0;
  color: var(--text-main);
}

.currency-sym {
  font-size: 1.4rem;
  font-weight: 800;
  margin-right: 2px;
}

.price-digits {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ocean-primary);
}

.bill-freq {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-left: 6px;
  font-weight: 600;
}

.tier-feature-specs {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 13px;
  border-top: 1px solid var(--prism-border-subtle);
  padding-top: 24px;
}

.tier-feature-specs li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.tier-feature-specs li svg {
  width: 18px;
  height: 18px;
  color: #10b981;
  flex-shrink: 0;
}

.tier-feature-specs li.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.65;
}

.tier-feature-specs li.disabled svg {
  color: var(--text-muted);
}

.pricing-bento-card .btn-cta,
.pricing-bento-card .btn-secondary {
  width: 100%;
  padding: 13px;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   10. 用户评价与真实口碑 (Testimonials)
   -------------------------------------------------------------------------- */
.reviews-grid-cryo {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-bento-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 34px 28px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-smooth);
}

.review-bento-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-ice-hover);
}

.review-stars-box {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

.review-stars-box svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.review-body-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 24px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--prism-border-subtle);
  padding-top: 16px;
}

.reviewer-avatar-crystal {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--ocean-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(10, 54, 157, 0.25);
  flex-shrink: 0;
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
}

.reviewer-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   11. 常见问题解答 (FAQ Accordion)
   -------------------------------------------------------------------------- */
.faq-cryo-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-cryo-item {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-crystal);
  backdrop-filter: blur(16px);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-cryo-item:hover {
  border-color: var(--glacial-ice);
}

.faq-cryo-item.active {
  border-color: var(--ocean-primary);
  box-shadow: var(--shadow-ice-hover);
}

.faq-cryo-btn {
  width: 100%;
  padding: 22px 26px;
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

.faq-cryo-btn:hover {
  color: var(--glacial-cyan);
}

.faq-chevron {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
  transition: transform var(--transition-smooth), color var(--transition-fast);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-cryo-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--ocean-primary);
}

.faq-cryo-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth) ease-out;
  background: rgba(247, 249, 252, 0.5);
}

[data-theme="dark"] .faq-cryo-body {
  background: rgba(6, 21, 45, 0.4);
}

.faq-cryo-item.active .faq-cryo-body {
  max-height: 320px;
}

.faq-cryo-text {
  padding: 16px 26px 24px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* 锚点动态过渡高亮动效 */
.anchor-highlight {
  animation: crystalFlash 1.6s ease-out;
}

@keyframes crystalFlash {
  0% { box-shadow: 0 0 0 4px var(--glacial-ice), var(--shadow-ice-hover); }
  100% { box-shadow: var(--shadow-ice-shelf); }
}

/* --------------------------------------------------------------------------
   12. 页脚规范 (严格只保留四个标题并打开新页面展示)
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  background: var(--nav-frost-bg);
  border-top: 1px solid var(--prism-border-subtle);
  backdrop-filter: blur(20px);
  padding: 54px 0 36px;
  transition: background-color var(--transition-smooth);
}

.footer-inner-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  text-align: center;
}

.footer-four-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-nav-link {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-nav-link:hover {
  color: var(--glacial-cyan);
  background: rgba(56, 189, 248, 0.12);
}

.footer-nav-link svg {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}

.footer-copyright-bar {
  border-top: 1px solid var(--prism-border-subtle);
  width: 100%;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand-domain {
  font-weight: 700;
  color: var(--ocean-primary);
}

/* --------------------------------------------------------------------------
   13. 推荐资讯子页面与资讯卡片专有样式 (explore-insights.html)
   -------------------------------------------------------------------------- */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 24px;
}

.insight-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 34px 30px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.insight-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-ice-hover);
  border-color: var(--glacial-ice);
}

.insight-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 4px 12px;
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid var(--prism-highlight);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-ice);
  margin-bottom: 16px;
}

.insight-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.insight-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.insight-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--prism-border-subtle);
  padding-top: 16px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   14. 制度与子页面文章排版 (Subpages Layout)
   -------------------------------------------------------------------------- */
.subpage-hero {
  padding: 64px 0 44px;
  text-align: center;
  background: var(--ice-shelf-card-bg);
  border-bottom: 1px solid var(--prism-border-subtle);
}

.subpage-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  color: var(--text-main);
}

.subpage-hero p {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
}

.subpage-body {
  padding: 60px 0 80px;
}

.subpage-article {
  max-width: 900px;
  margin: 0 auto;
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-ice-shelf);
  backdrop-filter: blur(24px);
}

.subpage-article h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--prism-border-subtle);
  padding-bottom: 10px;
}

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

.subpage-article h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 24px;
  margin-bottom: 10px;
}

.subpage-article p,
.subpage-article li {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.subpage-article ul,
.subpage-article ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.subpage-article ul { list-style: disc; }
.subpage-article ol { list-style: decimal; }

.alert-box {
  padding: 18px 22px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  font-size: 0.95rem;
  line-height: 1.68;
}

.alert-info {
  background: rgba(56, 189, 248, 0.1);
  border-left: 4px solid var(--glacial-cyan);
  color: var(--text-main);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-left: 4px solid #f59e0b;
  color: var(--text-main);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-left: 4px solid #10b981;
  color: var(--text-main);
}

.sitemap-tree {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 24px;
}

.sitemap-group {
  background: rgba(247, 249, 252, 0.6);
  border: 1px solid var(--prism-border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

[data-theme="dark"] .sitemap-group {
  background: rgba(6, 21, 45, 0.6);
}

.sitemap-group h3 {
  margin-top: 0;
  font-size: 1.15rem;
  color: var(--ocean-primary);
  border-bottom: 1px solid var(--prism-border-subtle);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.sitemap-group ul {
  padding-left: 16px;
  list-style: circle;
}

.sitemap-group li {
  margin-bottom: 10px;
}

.sitemap-group a {
  color: var(--text-main);
  font-weight: 500;
}

.sitemap-group a:hover {
  color: var(--glacial-cyan);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   14.1 SEO 深度长篇文章专用组件 (TOC, Meta, Tables, FAQ, Related Posts)
   -------------------------------------------------------------------------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-secondary);
}

.breadcrumbs a:hover {
  color: var(--ocean-primary);
  text-decoration: underline;
}

.breadcrumbs .separator {
  opacity: 0.5;
}

.breadcrumbs .current {
  color: var(--text-main);
  font-weight: 600;
}

.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 16px;
}

.article-meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--prism-border-subtle);
}

.article-meta-info span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.article-toc {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 30px 0 40px;
  box-shadow: var(--shadow-crystal);
}

.toc-title {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--ocean-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.toc-list {
  list-style: none !important;
  padding-left: 0 !important;
  margin-bottom: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list li a {
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.toc-list li a:hover {
  color: var(--ocean-primary);
  text-decoration: underline;
}

.toc-list li a::before {
  content: '▸';
  color: var(--glacial-ice);
  font-size: 0.85rem;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--prism-border-subtle);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
}

.article-table th {
  background: rgba(56, 189, 248, 0.12);
  color: var(--text-main);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--prism-border-subtle);
  white-space: nowrap;
}

.article-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--prism-border-subtle);
  color: var(--text-secondary);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: rgba(56, 189, 248, 0.05);
}

.article-cta-box {
  background: var(--ocean-gradient);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  margin: 48px 0;
  text-align: center;
  box-shadow: 0 16px 36px -8px rgba(10, 54, 157, 0.35);
  position: relative;
  overflow: hidden;
}

.article-cta-box h3 {
  font-size: 1.5rem;
  font-weight: 900;
  color: #ffffff !important;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: rgba(255, 255, 255, 0.9) !important;
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 24px;
}

.article-cta-box .btn-white {
  background: #ffffff;
  color: var(--ocean-primary) !important;
  font-weight: 800;
  padding: 12px 32px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-cta-box .btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.related-posts-section {
  margin-top: 50px;
  border-top: 1px solid var(--prism-border-subtle);
  padding-top: 36px;
}

.related-posts-section h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--ice-shelf-card-bg);
  border: 1px solid var(--prism-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--glacial-ice);
  box-shadow: var(--shadow-crystal);
}

.related-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-card:hover .related-card-title {
  color: var(--ocean-primary);
}

.related-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   15. 响应式适配 (@media Queries)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .bento-pipeline-box {
    grid-template-columns: 1fr 1fr;
  }
  
  .bento-features-grid,
  .pricing-ice-grid,
  .reviews-grid-cryo {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--nav-frost-bg);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--prism-border-subtle);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    display: none;
    box-shadow: var(--shadow-ice-shelf);
  }

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

  .mobile-menu-btn {
    display: block;
  }

  .hero-section {
    padding: 46px 0 36px;
  }

  .bento-pipeline-box,
  .bento-features-grid,
  .scenarios-grid,
  .pricing-ice-grid,
  .reviews-grid-cryo,
  .insights-grid,
  .sitemap-tree {
    grid-template-columns: 1fr;
  }

  .bento-stat-item {
    border-left: none;
    border-top: 1px solid var(--prism-border-subtle);
    padding-left: 0;
    padding-top: 12px;
  }

  .bento-feature-card,
  .cryo-scenario-card,
  .pricing-bento-card,
  .subpage-article {
    padding: 28px 20px;
  }

  .footer-four-links {
    gap: 20px;
  }

  .footer-copyright-bar {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .btn-cta,
  .btn-secondary {
    width: 100%;
    min-height: 48px;
    font-size: 1.05rem;
  }

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