/* ==========================================================================
   E-IX 机场官网 (e-ixjc.click) — 液态玻璃 Liquid Glass 设计系统
   ========================================================================== */
:root {
  --bg-sky: #e8f3fb;
  --bg-ice: #f4f9fd;
  --ink-primary: #0f2438;
  --ink-secondary: #3b556e;
  --ink-muted: #647d94;
  --accent-blue: #0a78d1;
  --accent-cyan: #0ea5b7;
  --accent-emerald: #135d3b;
  --accent-emerald-hover: #0d472c;
  --accent-amber: #d97706;
  --glass-bg: rgba(255, 255, 255, 0.56);
  --glass-bg-strong: rgba(255, 255, 255, 0.78);
  --glass-bg-subtle: rgba(255, 255, 255, 0.36);
  --glass-border: rgba(255, 255, 255, 0.78);
  --glass-border-soft: rgba(15, 36, 56, 0.08);
  --glass-shadow: 0 20px 50px rgba(15, 42, 68, 0.09), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --glass-shadow-hover: 0 26px 60px rgba(10, 120, 209, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --container-max: 1200px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background: linear-gradient(180deg, #d7ecfb 0%, #eef6fc 26%, #f5f9fc 60%, #e7f2fa 100%);
  min-height: 100vh;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* 动态冰川光影背景点缀 */
.glacier-backdrop {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 55% at 15% 10%, rgba(255, 255, 255, 0.92), transparent 65%),
    radial-gradient(ellipse 70% 50% at 85% 18%, rgba(125, 211, 252, 0.42), transparent 62%),
    radial-gradient(ellipse 65% 55% at 50% 85%, rgba(186, 230, 253, 0.48), transparent 70%),
    linear-gradient(165deg, #cde7fa 0%, #eaf4fc 45%, #f7fbff 100%);
}

.liquid-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(55px);
  opacity: 0.65;
  animation: orbFloat 18s ease-in-out infinite alternate;
}

.liquid-orb-1 {
  width: 520px;
  height: 520px;
  top: -120px;
  left: -90px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.42), rgba(255, 255, 255, 0));
}

.liquid-orb-2 {
  width: 460px;
  height: 460px;
  top: 18%;
  right: -110px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.25), rgba(14, 165, 233, 0.1));
  animation-delay: -6s;
}

.liquid-orb-3 {
  width: 580px;
  height: 420px;
  bottom: -140px;
  left: 28%;
  background: radial-gradient(circle, rgba(125, 211, 252, 0.36), rgba(255, 255, 255, 0));
  animation-delay: -11s;
}

@keyframes orbFloat {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(35px, -25px, 0) scale(1.06);
  }
  100% {
    transform: translate3d(-25px, 28px, 0) scale(0.96);
  }
}

/* 通用容器与液态玻璃材质 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-xl);
  position: relative;
}

.glass-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.2) 45%, rgba(125, 211, 252, 0.45));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.glass-card-hover {
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s ease, background 0.35s ease;
}

.glass-card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-hover);
  background: var(--glass-bg-strong);
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 14px;
  z-index: 100;
  padding: 0 16px;
  margin-top: 14px;
}

.nav-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.64);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid rgba(255, 255, 255, 0.88);
  box-shadow: 0 12px 32px rgba(15, 36, 56, 0.08);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink-primary);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0f2438 0%, #0a78d1 65%, #38bdf8 100%);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(10, 120, 209, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 13px;
  border-radius: var(--radius-pill);
  transition: background 0.25s ease, color 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(255, 255, 255, 0.85);
  color: var(--accent-blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95rem;
  border-radius: var(--radius-pill);
  padding: 11px 22px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}

.btn-glass-pill {
  background: rgba(255, 255, 255, 0.52);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.88);
  color: var(--ink-primary);
  box-shadow: 0 10px 26px rgba(15, 36, 56, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.btn-glass-pill:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 14px 30px rgba(10, 120, 209, 0.16);
}

.btn-primary {
  background: linear-gradient(135deg, #0f2438 0%, #0a6dc2 100%);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(10, 109, 194, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(10, 109, 194, 0.36);
}

.btn-emerald {
  background: var(--accent-emerald);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(19, 93, 59, 0.24);
}

.btn-emerald:hover {
  background: var(--accent-emerald-hover);
  transform: translateY(-2px);
}

.btn-outline-emerald {
  background: rgba(255, 255, 255, 0.7);
  color: var(--accent-emerald);
  border: 1.5px solid var(--accent-emerald);
}

.btn-outline-emerald:hover {
  background: var(--accent-emerald);
  color: #ffffff;
}

.btn-icon-circle {
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: 50%;
}

.nav-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(15, 36, 56, 0.12);
  border-radius: 12px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink-primary);
}

/* ==========================================================================
   Hero 区域（致敬图1：液态玻璃 + 冰川质感 + 动态折射卡片）
   ========================================================================== */
.hero-section {
  padding: 36px 0 56px;
}

.hero-stage {
  position: relative;
  border-radius: 34px;
  overflow: hidden;
  padding: 34px 44px 48px;
  background:
    radial-gradient(circle at 75% 22%, rgba(255, 255, 255, 0.92), transparent 44%),
    linear-gradient(175deg, #bfe1fa 0%, #dff0fc 42%, #9ed0f5 72%, #6eb5ea 100%);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 28px 70px rgba(15, 42, 68, 0.14);
  min-height: 540px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* SVG 冰川山脉与湖面反光背景 */
.hero-glacier-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  z-index: 0;
}

.hero-top-meta {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: rgba(15, 36, 56, 0.72);
  text-transform: uppercase;
}

.hero-meta-badges {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-circle-badge {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  display: grid;
  place-items: center;
  color: var(--ink-primary);
  box-shadow: 0 6px 18px rgba(15, 36, 56, 0.08);
  text-decoration: none;
  font-size: 0.95rem;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
  margin-top: 28px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.56);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.85);
  font-size: 0.84rem;
  font-weight: 650;
  color: var(--ink-primary);
  margin-bottom: 18px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65);
  animation: pulseRing 2s infinite;
}

@keyframes pulseRing {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(2.2rem, 4.4vw, 3.65rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: #10253a;
}

.hero-subtitle {
  margin: 0 0 28px;
  font-size: 1.06rem;
  line-height: 1.75;
  color: #1e3b56;
  max-width: 560px;
  background: rgba(255, 255, 255, 0.34);
  backdrop-filter: blur(10px);
  padding: 12px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.55);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.hero-stats-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 26px;
}

.hero-mini-stat {
  font-size: 0.88rem;
  font-weight: 600;
  color: #14324d;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.48);
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.72);
}

/* 图1右侧悬浮液态玻璃棱镜卡片 */
.liquid-prism-widget {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.16));
  backdrop-filter: blur(18px) saturate(190%);
  -webkit-backdrop-filter: blur(18px) saturate(190%);
  border: 1.5px solid rgba(255, 255, 255, 0.78);
  border-radius: 32px;
  padding: 26px;
  box-shadow:
    0 24px 60px rgba(13, 47, 82, 0.16),
    inset 0 2px 12px rgba(255, 255, 255, 0.85),
    inset 0 -8px 20px rgba(14, 165, 233, 0.12);
  transform-style: preserve-3d;
  transition: transform 0.25s ease;
}

.prism-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.48);
}

.prism-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: #0f2438;
  font-size: 1.05rem;
}

.prism-temp {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: #0c4a6e;
}

.prism-node-list {
  display: grid;
  gap: 10px;
}

.prism-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.46);
  border: 1px solid rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

.prism-node-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  color: var(--ink-primary);
}

.prism-ping {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #047857;
  font-size: 0.86rem;
}

.prism-footer {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: #163754;
  font-weight: 600;
}

/* ==========================================================================
   区块通用标题
   ========================================================================== */
.section-block {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 42px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-blue);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(10, 120, 209, 0.18);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  margin: 0 0 12px;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
}

.section-desc {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 1rem;
}

/* ==========================================================================
   节点状态面板
   ========================================================================== */
.node-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-pill {
  border: 1px solid rgba(15, 36, 56, 0.1);
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink-secondary);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.22s ease;
}

.filter-pill.active,
.filter-pill:hover {
  background: var(--ink-primary);
  color: #ffffff;
  border-color: var(--ink-primary);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 16px;
}

.node-card {
  padding: 20px;
  border-radius: var(--radius-lg);
}

.node-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-region {
  font-weight: 750;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-iplc {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: rgba(10, 120, 209, 0.12);
  color: var(--accent-blue);
}

.node-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid rgba(15, 36, 56, 0.07);
  border-bottom: 1px solid rgba(15, 36, 56, 0.07);
  margin-bottom: 10px;
  font-size: 0.82rem;
}

.metric-label {
  color: var(--ink-muted);
  display: block;
}

.metric-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-primary);
}

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.node-tag {
  font-size: 0.76rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(19, 93, 59, 0.08);
  color: var(--accent-emerald);
  font-weight: 600;
}

/* ==========================================================================
   核心优势
   ========================================================================== */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.adv-card {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.adv-icon {
  width: 48px;
  height: 48px;
  border-radius: 15px;
  background: linear-gradient(135deg, rgba(10, 120, 209, 0.14), rgba(56, 189, 248, 0.24));
  border: 1px solid rgba(255, 255, 255, 0.85);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  margin-bottom: 16px;
}

.adv-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 750;
}

.adv-card p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 0.94rem;
}

/* 全平台支持条 */
.platform-strip {
  margin-top: 24px;
  padding: 22px 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-radius: var(--radius-lg);
}

.platform-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.platform-pill {
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(15, 36, 56, 0.08);
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--ink-primary);
}

/* ==========================================================================
   套餐价格（致敬图2：三栏卡片 + 编辑推荐角标 + 液态玻璃边框）
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  overflow: hidden;
  padding: 36px 30px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(22px);
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-top: 3px solid var(--accent-emerald);
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glass-shadow-hover);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(255, 252, 245, 0.92) 0%, rgba(255, 255, 255, 0.86) 100%);
  border-top: 3px solid #d97706;
  transform: translateY(-8px);
  box-shadow: 0 26px 60px rgba(19, 93, 59, 0.14);
}

.pricing-card.featured:hover {
  transform: translateY(-12px);
}

.ribbon-featured {
  position: absolute;
  top: 18px;
  right: -34px;
  background: #d97706;
  color: #fff;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 5px 40px;
  transform: rotate(42deg);
  letter-spacing: 0.06em;
  box-shadow: 0 4px 10px rgba(217, 119, 6, 0.3);
}

.plan-name {
  text-align: center;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-emerald);
  margin: 0 0 12px;
}

.plan-price {
  text-align: center;
  margin-bottom: 24px;
  color: var(--ink-primary);
}

.plan-price .currency {
  font-size: 1.5rem;
  font-weight: 700;
  vertical-align: top;
}

.plan-price .amount {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
}

.plan-price .period {
  font-size: 0.95rem;
  color: var(--ink-muted);
  margin-left: 2px;
}

.plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 13px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-secondary);
  font-size: 0.95rem;
}

.plan-features li::before {
  content: "✓";
  color: var(--accent-emerald);
  font-weight: 800;
}

.pricing-card .btn {
  width: 100%;
  padding: 13px 20px;
}

/* ==========================================================================
   50问 FAQ 区域
   ========================================================================== */
.faq-controls {
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  margin-bottom: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.faq-search-wrap {
  flex: 1 1 280px;
  position: relative;
}

.faq-search {
  width: 100%;
  padding: 11px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(15, 36, 56, 0.14);
  background: rgba(255, 255, 255, 0.85);
  font-size: 0.94rem;
  color: var(--ink-primary);
  outline: none;
}

.faq-search:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(10, 120, 209, 0.14);
}

.faq-count-badge {
  font-size: 0.86rem;
  font-weight: 650;
  color: var(--ink-secondary);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.faq-item {
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.66);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 22px rgba(15, 36, 56, 0.05);
  overflow: hidden;
  transition: background 0.2s ease;
}

.faq-item[open] {
  background: rgba(255, 255, 255, 0.9);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 15px 18px;
  font-weight: 650;
  font-size: 0.94rem;
  color: var(--ink-primary);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-blue);
  background: rgba(10, 120, 209, 0.1);
  padding: 2px 7px;
  border-radius: 6px;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-q-text {
  flex: 1;
}

.faq-chevron {
  color: var(--ink-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 18px 16px 18px;
  color: var(--ink-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(15, 36, 56, 0.06);
  padding-top: 12px;
}

/* ==========================================================================
   知识库与教程卡片
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
}

.article-kw {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent-blue);
  background: rgba(10, 120, 209, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}

.article-card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 750;
  line-height: 1.45;
  color: var(--ink-primary);
}

.article-card p {
  margin: 0 0 16px;
  font-size: 0.89rem;
  color: var(--ink-secondary);
  line-height: 1.65;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--accent-blue);
  padding-top: 12px;
  border-top: 1px solid rgba(15, 36, 56, 0.07);
}

/* ==========================================================================
   文章详情页样式
   ========================================================================== */
.article-page-wrap {
  padding: 28px 0 72px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 28px;
  align-items: start;
}

.article-main {
  padding: 38px 42px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.84);
}

.article-header h1 {
  margin: 10px 0 14px;
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  line-height: 1.3;
  color: var(--ink-primary);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--ink-muted);
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(15, 36, 56, 0.09);
  margin-bottom: 24px;
}

.geo-tldr-box {
  background: linear-gradient(135deg, rgba(10, 120, 209, 0.08), rgba(56, 189, 248, 0.12));
  border-left: 4px solid var(--accent-blue);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 26px;
}

.geo-tldr-box strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-primary);
}

.article-prose h2 {
  margin: 30px 0 12px;
  font-size: 1.35rem;
  color: var(--ink-primary);
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(15, 36, 56, 0.08);
}

.article-prose h3 {
  margin: 22px 0 8px;
  font-size: 1.1rem;
  color: var(--ink-primary);
}

.article-prose p {
  margin: 0 0 16px;
  color: #1f3952;
  font-size: 1.01rem;
  line-height: 1.85;
}

.article-prose ul,
.article-prose ol {
  margin: 0 0 18px;
  padding-left: 22px;
  color: #1f3952;
}

.article-prose li {
  margin-bottom: 8px;
}

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

.article-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
}

.article-prose table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.92rem;
}

.article-prose th,
.article-prose td {
  padding: 11px 14px;
  border: 1px solid rgba(15, 36, 56, 0.08);
  text-align: left;
}

.article-prose th {
  background: rgba(10, 120, 209, 0.08);
  font-weight: 700;
}

.article-cta-banner {
  margin: 28px 0;
  padding: 22px 24px;
  border-radius: 18px;
  background: linear-gradient(135deg, #0f2438 0%, #0a6dc2 100%);
  color: #ffffff;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.article-cta-banner h4 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}

.article-cta-banner p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
}

.article-faq-section {
  margin-top: 36px;
  padding-top: 26px;
  border-top: 2px solid rgba(15, 36, 56, 0.08);
}

.article-faq-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.article-nav-links {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.article-nav-card {
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(15, 36, 56, 0.08);
  text-decoration: none;
  color: var(--ink-primary);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-nav-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-blue);
}

.article-nav-label {
  display: block;
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.article-sidebar {
  position: sticky;
  top: 90px;
  display: grid;
  gap: 18px;
}

.sidebar-box {
  padding: 22px;
  border-radius: var(--radius-lg);
}

.sidebar-box h4 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.sidebar-links a {
  text-decoration: none;
  color: var(--ink-secondary);
  font-size: 0.89rem;
  font-weight: 550;
  display: block;
  line-height: 1.45;
}

.sidebar-links a:hover {
  color: var(--accent-blue);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, #0a78d1, #10b981);
  z-index: 200;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: 40px;
  padding: 44px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.48);
  backdrop-filter: blur(18px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 0.96rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 0.88rem;
}

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

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid rgba(15, 36, 56, 0.08);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

/* 动效出现 */
.reveal-up {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   响应式适配
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }
  .advantage-grid,
  .pricing-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 16px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(15, 36, 56, 0.14);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-actions .btn-outline-emerald {
    display: none;
  }
  .hero-stage {
    padding: 24px 20px 30px;
    min-height: auto;
  }
  .advantage-grid,
  .pricing-grid,
  .articles-grid,
  .faq-grid,
  .article-nav-links,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .article-main {
    padding: 24px 20px;
  }
}