/* ==========================================================================
   随便云 (suibiancloud.lol) - Apple Liquid Glass 设计系统
   Design Specification:
   - Light base: #fbfaff
   - Multiple drifting colored radial glows (sakura pink / sky blue / mint / butter yellow)
   - High-refraction liquid glass: backdrop-filter blur(28px) saturate(1.7)
   - Translucent white fill, 1px bright border, inner top highlight line, 24-28px radius
   - Glassy pill navbar
   - Centered hero with violet -> pink gradient keyword
   - Two CTAs: gradient pill + glass ghost
   - Row of glass stat capsules & three glass feature cards
   - Mood: crisp, refined, tangible depth
   ========================================================================== */

:root {
  --bg-base: #fbfaff;
  --bg-glass-nav: rgba(255, 255, 255, 0.72);
  --bg-glass-card: rgba(255, 255, 255, 0.68);
  --bg-glass-card-hover: rgba(255, 255, 255, 0.85);
  --bg-glass-featured: rgba(255, 255, 255, 0.82);
  --bg-glass-pill: rgba(255, 255, 255, 0.62);

  --border-glass: rgba(255, 255, 255, 0.85);
  --border-glass-light: rgba(255, 255, 255, 0.6);
  --border-glass-featured: rgba(192, 132, 252, 0.6);

  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --accent-violet: #7c3aed;
  --accent-fuchsia: #c026d3;
  --accent-pink: #ec4899;
  --accent-blue: #0284c7;
  --accent-mint: #059669;

  --grad-hero: linear-gradient(135deg, #7c3aed 0%, #c026d3 45%, #ec4899 100%);
  --grad-pill-cta: linear-gradient(135deg, #8b5cf6 0%, #d946ef 50%, #ec4899 100%);
  --grad-pill-cta-hover: linear-gradient(135deg, #7c3aed 0%, #c026d3 50%, #db2777 100%);
  --grad-blue-mint: linear-gradient(135deg, #38bdf8 0%, #34d399 100%);

  --radius-pill: 9999px;
  --radius-card: 26px;
  --radius-inner: 18px;
  --radius-sm: 12px;

  /* Liquid Glass 真实折射内光阴影体系 */
  --shadow-liquid-glass: 
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.95),
    0 10px 30px -4px rgba(100, 116, 139, 0.08),
    0 2px 8px -2px rgba(100, 116, 139, 0.04);
  
  --shadow-liquid-glass-hover: 
    inset 0 1px 1.5px 0 #ffffff,
    0 20px 40px -8px rgba(124, 58, 237, 0.12),
    0 4px 12px -2px rgba(100, 116, 139, 0.06);

  --shadow-featured-glow: 
    inset 0 1px 1.5px 0 #ffffff,
    0 20px 45px -6px rgba(217, 70, 239, 0.18),
    0 4px 16px -2px rgba(124, 58, 237, 0.1);

  --shadow-pill-cta: 0 8px 24px -2px rgba(236, 72, 153, 0.35);

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
}

*, *::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: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   多重漂浮柔光背景 (Drifting Colored Radial Glows)
   Sakura Pink / Sky Blue / Mint / Butter Yellow
   ========================================================================== */
.ambient-glow-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(85px);
  -webkit-filter: blur(85px);
  opacity: 0.65;
  mix-blend-mode: multiply;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

/* 1. Sakura Pink (樱花粉) */
.glow-sakura {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(255, 182, 193, 0.8) 0%, rgba(255, 218, 224, 0.4) 45%, rgba(255, 240, 243, 0) 70%);
  top: -120px;
  left: -100px;
  animation: driftSakura 20s ease-in-out infinite alternate;
}

/* 2. Sky Blue (晴空蓝) */
.glow-sky {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(125, 211, 252, 0.75) 0%, rgba(186, 230, 253, 0.4) 45%, rgba(224, 242, 254, 0) 70%);
  top: 40px;
  right: -140px;
  animation: driftSky 24s ease-in-out infinite alternate;
}

/* 3. Mint (薄荷青) */
.glow-mint {
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(167, 243, 208, 0.7) 0%, rgba(209, 250, 229, 0.35) 45%, rgba(236, 253, 245, 0) 70%);
  bottom: 12%;
  left: -80px;
  animation: driftMint 22s ease-in-out infinite alternate;
}

/* 4. Butter Yellow (黄油奶黄) */
.glow-yellow {
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, rgba(254, 240, 138, 0.65) 0%, rgba(254, 249, 195, 0.35) 45%, rgba(255, 253, 235, 0) 70%);
  bottom: 20%;
  right: -60px;
  animation: driftYellow 26s ease-in-out infinite alternate;
}

@keyframes driftSakura {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(120px, 80px) scale(1.1); }
  100% { transform: translate(60px, 160px) scale(0.95); }
}

@keyframes driftSky {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-100px, 120px) scale(1.08); }
  100% { transform: translate(-160px, 50px) scale(0.92); }
}

@keyframes driftMint {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(140px, -90px) scale(1.12); }
  100% { transform: translate(80px, -150px) scale(0.98); }
}

@keyframes driftYellow {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-110px, -100px) scale(1.06); }
  100% { transform: translate(-60px, -160px) scale(0.94); }
}

/* 动态背景画布（轻盈光粒子） */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.7;
}

.app-container {
  position: relative;
  z-index: 2;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   Apple Liquid Glass 核心拟态类 (Reusable Classes)
   ========================================================================== */
.liquid-glass {
  background: var(--bg-glass-card);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-liquid-glass);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.liquid-glass:hover {
  background: var(--bg-glass-card-hover);
  box-shadow: var(--shadow-liquid-glass-hover);
}

/* ==========================================================================
   Glassy Pill Navbar (苹果胶囊悬浮导航栏)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 14px;
  z-index: 1000;
  padding: 0 16px;
}

.nav-pill-wrap {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  height: 64px;
  padding: 0 18px 0 14px;
  background: var(--bg-glass-nav);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-pill);
  box-shadow: 
    inset 0 1px 1px 0 rgba(255, 255, 255, 1),
    0 12px 32px -4px rgba(15, 23, 42, 0.08),
    0 2px 6px -1px rgba(15, 23, 42, 0.03);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.06));
  transition: transform 0.25s ease;
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.04);
}

.brand-text-wrap {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.brand-tag {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
  flex-shrink: 1;
}

.nav-link {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 9px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap !important;
  word-break: keep-all;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.nav-badge-hot {
  font-size: 0.62rem;
  font-weight: 700;
  padding: 2px 6px;
  background: var(--grad-pill-cta);
  color: #ffffff;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 6px rgba(236, 72, 153, 0.35);
  white-space: nowrap;
}

.nav-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  white-space: nowrap;
}

/* ==========================================================================
   按钮规范 (Button System: Gradient Pill + Glass Ghost)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  padding: 12px 26px;
  cursor: pointer;
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  font-size: 0.94rem;
  text-decoration: none;
  white-space: nowrap;
}

/* 1. Gradient Pill CTA (渐变胶囊主按钮) */
.btn-gradient-pill {
  background: var(--grad-pill-cta);
  color: #ffffff;
  box-shadow: var(--shadow-pill-cta);
  border: 1px solid rgba(255, 255, 255, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-gradient-pill:hover {
  background: var(--grad-pill-cta-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -2px rgba(236, 72, 153, 0.45);
  color: #ffffff;
}

/* 2. Glass Ghost CTA (高折射液态玻璃次级按钮) */
.btn-glass-ghost {
  background: var(--bg-glass-card);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  box-shadow: 
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.95),
    0 4px 12px rgba(0, 0, 0, 0.04);
}

.btn-glass-ghost:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 
    inset 0 1px 1px 0 #ffffff,
    0 8px 20px rgba(0, 0, 0, 0.07);
  color: var(--text-main);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
}

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

/* ==========================================================================
   Centered Hero 核心首屏区域
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 90px 0 60px;
  text-align: center;
}

/* 苹果风格徽标胶囊 */
.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: inset 0 1px 1px #fff, 0 4px 14px rgba(0, 0, 0, 0.04);
  margin-bottom: 28px;
}

.pulse-dot-apple {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: applePulse 2s infinite;
}

@keyframes applePulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--text-main);
  margin-bottom: 22px;
}

/* 核心要求：Violet -> Pink gradient keyword */
.hero-gradient-text {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 38px;
  line-height: 1.7;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

/* ==========================================================================
   核心要求：Row of Glass Stat Capsules (玻璃数据胶囊行)
   ========================================================================== */
.hero-stat-capsules {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto 60px;
  flex-wrap: wrap;
}

.stat-capsule {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px;
  background: var(--bg-glass-card);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-liquid-glass);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.stat-capsule:hover {
  background: var(--bg-glass-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-liquid-glass-hover);
}

.capsule-number {
  font-size: 1.35rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-violet);
  line-height: 1;
}

.capsule-number span {
  font-size: 0.85rem;
  color: var(--accent-pink);
  margin-left: 2px;
}

.capsule-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* ==========================================================================
   核心要求：Three Glass Feature Cards (三块高折射液态玻璃特性卡)
   ========================================================================== */
.hero-three-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1140px;
  margin: 0 auto;
}

.glass-feature-card {
  padding: 34px 28px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-icon-apple {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-inner);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 240, 255, 0.7) 100%);
  border: 1px solid rgba(255, 255, 255, 1);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 22px;
}

.feature-title-apple {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.feature-desc-apple {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Section 通用标题样式
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 46px;
}

.section-tag-apple {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-violet);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
  background: rgba(124, 58, 237, 0.08);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   核心要求：价格套餐专区 - 所有价格严格同排对齐 (Equal Height 3-Column Grid)
   ========================================================================== */
.pricing-section {
  position: relative;
}

.pricing-banner-tip-apple {
  max-width: 920px;
  margin: 0 auto 36px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  box-shadow: var(--shadow-liquid-glass);
}

/* 核心：桌面端严格同排展示 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch; /* 保证三个卡片高度严格一致且同排 */
  max-width: 1140px;
  margin: 0 auto;
}

.pricing-card {
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

/* 爆款主推款卡片 */
.pricing-card.featured {
  background: var(--bg-glass-featured);
  border: 2px solid var(--border-glass-featured);
  box-shadow: var(--shadow-featured-glow);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 
    inset 0 1px 2px #fff,
    0 26px 50px -8px rgba(217, 70, 239, 0.25);
}

.pricing-badge-apple {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-pill-cta);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(236, 72, 153, 0.45);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 22px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  min-height: 40px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  margin: 20px 0 16px;
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-violet);
  margin-right: 2px;
}

.pricing-card.featured .price-currency {
  color: var(--accent-fuchsia);
}

.price-amount {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-left: 8px;
}

.plan-traffic-highlight-apple {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(124, 58, 237, 0.08);
  border-radius: var(--radius-sm);
  color: var(--accent-violet);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 22px;
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.pricing-card.featured .plan-traffic-highlight-apple {
  background: rgba(217, 70, 239, 0.1);
  color: var(--accent-fuchsia);
  border-color: rgba(217, 70, 239, 0.2);
}

.plan-features {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  color: #10b981;
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-btn {
  width: 100%;
  margin-top: auto;
}

/* 弹性加油包横幅 */
.extra-plan-banner-apple {
  margin-top: 32px;
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding: 22px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.extra-plan-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.extra-plan-badge-apple {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
}

.extra-plan-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.extra-plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   全球节点实测网络 Nodes
   ========================================================================== */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.node-card-apple {
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 1.7rem;
}

.node-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.node-type {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.node-ping-pill {
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.86rem;
  border: 1px solid transparent;
}

.ping-green {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.2);
}

.ping-blue {
  background: rgba(2, 132, 199, 0.1);
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.2);
}

.ping-amber {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
  border-color: rgba(245, 158, 11, 0.2);
}

/* ==========================================================================
   客户端生态与外链 Downloads
   ========================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.download-card-apple {
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
}

.download-icon-wrap {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.download-os {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.download-clients {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 18px;
}

.download-action-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-violet);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   8 篇 SEO 机场评测技术专栏 Articles
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card-apple {
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.article-category-apple {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(124, 58, 237, 0.08);
  color: var(--accent-violet);
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.article-read-time {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.article-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 12px;
}

.article-card-title a:hover {
  color: var(--accent-violet);
}

.article-card-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-keywords-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.article-kw-tag-apple {
  font-size: 0.74rem;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.03);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.article-link-btn-apple {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-violet);
  margin-top: auto;
}

.article-link-btn-apple:hover {
  color: var(--accent-pink);
  transform: translateX(4px);
}

/* ==========================================================================
   最下方：用户真实评价 Reviews
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card-apple {
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #f59e0b;
  font-size: 1.05rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  font-style: italic;
}

.review-author-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: 16px;
}

.review-avatar-apple {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad-pill-cta);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
  flex-shrink: 0;
}

.review-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* ==========================================================================
   最下方：常见问题 FAQ Section (手风琴)
   ========================================================================== */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item-apple {
  background: var(--bg-glass-card);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-inner);
  box-shadow: var(--shadow-liquid-glass);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item-apple[open] {
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-liquid-glass-hover);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--accent-violet);
  transition: transform 0.25s ease;
}

.faq-item-apple[open] .faq-summary::after {
  content: '−';
  transform: rotate(180deg);
  color: var(--accent-pink);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 16px;
}

.faq-answer a {
  color: var(--accent-violet);
  text-decoration: underline;
  font-weight: 600;
}

/* ==========================================================================
   底部 CTA 转化横幅
   ========================================================================== */
.bottom-cta-section {
  padding: 80px 0;
  text-align: center;
}

.bottom-cta-box-apple {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 36px;
  text-align: center;
}

.bottom-cta-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: var(--text-main);
}

.bottom-cta-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 34px;
}

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.site-footer {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 30px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

.footer-col-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-links a:hover {
  color: var(--accent-violet);
}

.footer-badge-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   子页面与文章专属排版 (Article & Legal Page Layout)
   ========================================================================== */
.page-sub {
  background-color: var(--bg-base);
}

.page-content {
  padding: 48px 24px 80px;
  max-width: 960px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.breadcrumb a:hover {
  color: var(--accent-violet);
}

.article-header-block {
  margin-bottom: 36px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding-bottom: 28px;
}

.article-title-main {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.025em;
  color: var(--text-main);
  margin-bottom: 18px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-violet);
  margin: 28px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body strong {
  color: var(--text-main);
}

.article-body a {
  color: var(--accent-violet);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.article-body a:hover {
  color: var(--accent-pink);
}

.article-body blockquote {
  border-left: 4px solid var(--accent-violet);
  background: rgba(124, 58, 237, 0.06);
  padding: 16px 20px;
  border-radius: 0 var(--radius-inner) var(--radius-inner) 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.95rem;
  background: var(--bg-glass-card);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border-radius: var(--radius-inner);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-liquid-glass);
}

.article-body th, .article-body td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.article-body th {
  background: rgba(255, 255, 255, 0.85);
  font-weight: 700;
  color: var(--text-main);
}

.article-body pre {
  background: #1e1b4b;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-inner);
  padding: 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin: 20px 0;
  color: #f1f5f9;
}

.article-cta-box-apple {
  background: var(--bg-glass-featured);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 34px 28px;
  text-align: center;
  margin: 40px 0;
  box-shadow: var(--shadow-featured-glow);
}

.article-cta-box-apple h3 {
  font-size: 1.45rem;
  color: var(--text-main);
  margin-bottom: 10px;
}

.article-cta-box-apple p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
}

.related-articles-section {
  margin-top: 60px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  padding-top: 40px;
}

.related-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.sitemap-card-apple {
  padding: 30px 26px;
}

.sitemap-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: block;
}

.sitemap-list a:hover {
  color: var(--accent-violet);
  transform: translateX(4px);
}

/* 移动端吸底 CTA 栏 (苹果液态玻璃胶囊) */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 14px;
  left: 14px;
  right: 14px;
  background: var(--bg-glass-featured);
  backdrop-filter: blur(28px) saturate(1.7);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  box-shadow: 
    inset 0 1px 1px 0 #ffffff,
    0 12px 36px rgba(0, 0, 0, 0.12);
  padding: 10px 18px;
  z-index: 999;
}

.mobile-sticky-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-sticky-price {
  display: flex;
  flex-direction: column;
}

.mobile-sticky-price strong {
  font-size: 1.15rem;
  color: var(--accent-violet);
  font-family: var(--font-mono);
}

.mobile-sticky-price span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   响应式设计与移动端完全适配 Responsive Media Queries
   ========================================================================== */
@media (max-width: 1080px) {
  .site-header {
    top: 10px;
    padding: 0 10px;
  }

  .nav-pill-wrap {
    height: 58px;
    border-radius: var(--radius-inner);
    padding: 0 14px;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 66px;
    left: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(28px) saturate(1.7);
    -webkit-backdrop-filter: blur(28px) saturate(1.7);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    flex-direction: column;
    padding: 20px;
    gap: 12px;
  }

  .nav-menu.is-active {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 6px;
  }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
    font-size: 1rem;
    white-space: nowrap;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-actions {
    display: none;
  }

  .hero-title {
    font-size: 3rem;
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .pricing-card {
    padding: 28px 20px;
  }
  .hero-three-features {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .hero-three-features {
    grid-template-columns: 1fr;
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.3rem;
  }

  .hero-desc {
    font-size: 1.05rem;
  }

  .hero-stat-capsules {
    gap: 10px;
  }

  .stat-capsule {
    padding: 8px 16px;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .mobile-sticky-bar {
    display: block;
  }

  body {
    padding-bottom: 80px;
  }
}

/* Liquid Glass Brand Icon Badge */
.brand-icon-glass {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(245, 243, 255, 0.7) 100%);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 
    inset 0 1px 1.5px 0 #ffffff,
    0 4px 12px -2px rgba(124, 58, 237, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.brand-logo:hover .brand-icon-glass {
  transform: scale(1.05);
  box-shadow: 
    inset 0 1px 1.5px 0 #ffffff,
    0 8px 18px -2px rgba(236, 72, 153, 0.28);
}