/* ==========================================================================
   一分机场 (YIFEN NETWORK) - 浅色系蒂芙尼绿 (Light Tiffany Blue) 设计系统与样式表
   配色：蒂芙尼绿 (#81D8D0 / #0D9488) / 浅青白底色 (#F5FAF9) / 薄荷明净卡片
   字体提升：字号更大、字重适中加粗、清晰易读
   ========================================================================== */

:root {
  --bg-main: #f5faf9;
  --bg-secondary: #ebf5f4;
  --bg-card: rgba(255, 255, 255, 0.94);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(13, 148, 136, 0.05);
  
  --border-subtle: rgba(13, 148, 136, 0.14);
  --border-highlight: rgba(13, 148, 136, 0.32);
  --border-glow: rgba(129, 216, 208, 0.6);

  --text-primary: #081a19;
  --text-secondary: #27403f;
  --text-muted: #557371;
  --text-dim: #84a3a1;

  --tiffany-main: #0d9488;
  --tiffany-light: #81d8d0;
  --tiffany-bright: #14b8a6;
  --tiffany-dark: #0f766e;
  --tiffany-soft: #e2f5f3;

  --shadow-card: 0 10px 30px -5px rgba(13, 148, 136, 0.09), 0 2px 8px -2px rgba(0, 0, 0, 0.04), inset 0 1px 0 #ffffff;
  --shadow-card-hover: 0 20px 45px -8px rgba(13, 148, 136, 0.2), 0 4px 16px -2px rgba(13, 148, 136, 0.1), inset 0 1px 0 #ffffff;

  --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: 'Noto Serif SC', "Songti SC", serif;
  --font-mono: 'DM Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Styling */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-weight: 400;
}

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

button, input {
  font-family: inherit;
  border: none;
  background: none;
  outline: none;
}

/* Ambient Background Lights */
.ambient {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
  animation: floatAmbient 18s ease-in-out infinite alternate;
}

.ambient-a {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(129, 216, 208, 0.22) 0%, rgba(245, 250, 249, 0) 70%);
  top: -100px;
  left: -100px;
}

.ambient-b {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.18) 0%, rgba(245, 250, 249, 0) 70%);
  bottom: 10%;
  right: -150px;
  animation-delay: -9s;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.1); }
  100% { transform: translate(-30px, 50px) scale(0.95); }
}

/* Container Wrap */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Navigation (放大字号与字重) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(245, 250, 249, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.nav-wrap {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #81d8d0 0%, #0d9488 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 17px;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-text span {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-text small {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--tiffany-dark);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.desktop-nav a {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.desktop-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--tiffany-main);
  border-radius: 99px;
  transition: width var(--transition-fast);
}

.desktop-nav a:hover {
  color: var(--tiffany-dark);
}

.desktop-nav a:hover::after {
  width: 100%;
}

/* Buttons (调大字号与加粗) */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 99px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.button-primary {
  background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.3);
}

.button-primary:hover {
  background: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(13, 148, 136, 0.4);
}

.button-outline {
  background: #ffffff;
  color: var(--tiffany-dark);
  border: 1.5px solid var(--tiffany-light);
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.1);
}

.button-outline:hover {
  border-color: var(--tiffany-main);
  background: var(--tiffany-soft);
  transform: translateY(-2px);
}

.button-dark {
  background: var(--tiffany-soft);
  color: var(--tiffany-dark);
  border: 1px solid rgba(13, 148, 136, 0.22);
}

.button-dark:hover {
  background: #d4f2ef;
  border-color: var(--tiffany-main);
}

.button-small {
  padding: 10px 20px;
  font-size: 14px;
}

.text-link {
  font-size: 15px;
  color: var(--tiffany-dark);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.text-link:hover {
  color: var(--tiffany-main);
  gap: 12px;
}

/* Eyebrows & Section Headings (字号更大更稳) */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--tiffany-dark);
  margin-bottom: 14px;
  font-weight: 600;
}

.pulse {
  width: 8px;
  height: 8px;
  background-color: var(--tiffany-bright);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--tiffany-light);
  animation: livePulse 2s infinite;
}

@keyframes livePulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(20, 184, 166, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(20, 184, 166, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(20, 184, 166, 0); }
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
  gap: 24px;
}

.section-heading h2 {
  font-size: 42px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.section-heading h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 700;
  color: var(--tiffany-main);
}

.section-note {
  max-width: 460px;
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.65;
}

/* Hero Section (大标题与大正文) */
.hero-section {
  padding: 85px 0 110px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 60px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 26px;
  color: var(--text-primary);
}

.hero-copy h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 700;
  color: var(--tiffany-main);
  background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 38px;
  max-width: 530px;
  font-weight: 400;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 48px;
}

.hero-proof {
  display: flex;
  align-items: center;
  gap: 40px;
  padding-top: 30px;
  border-top: 1.5px solid var(--border-subtle);
}

.hero-proof div strong {
  display: block;
  font-size: 26px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--tiffany-dark);
}

.hero-proof div span {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Hero Visual - 仪表盘卡片 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.signal-card {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1.5px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  transform-style: preserve-3d;
  perspective: 1000px;
}

.signal-card:hover {
  transform: translateY(-6px) rotateX(2deg) rotateY(-2deg);
  border-color: var(--tiffany-light);
  box-shadow: var(--shadow-card-hover);
}

.signal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 500;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--tiffany-bright);
  font-weight: 600;
}

.signal-main {
  margin-bottom: 28px;
}

.signal-number {
  font-size: 56px;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1;
  color: var(--tiffany-dark);
  margin-bottom: 8px;
}

.signal-number span {
  font-size: 22px;
  color: var(--text-muted);
  margin-left: 4px;
}

.signal-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
}

.signal-label b {
  color: var(--text-primary);
  font-weight: 600;
}

/* Dynamic Bar Chart */
.signal-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 75px;
  margin-bottom: 24px;
  padding: 10px 0;
}

.signal-chart i {
  flex: 1;
  background: linear-gradient(180deg, #14b8a6 0%, rgba(129, 216, 208, 0.3) 100%);
  border-radius: 4px;
  transition: height var(--transition-fast);
  animation: chartPulse 3s infinite ease-in-out alternate;
}

@keyframes chartPulse {
  0% { opacity: 0.75; }
  100% { opacity: 1; }
}

.signal-foot {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-weight: 500;
}

.signal-foot b {
  color: var(--text-primary);
}

.signal-foot b.lime {
  color: var(--tiffany-dark);
}

.float-tag {
  position: absolute;
  padding: 12px 20px;
  background: #ffffff;
  border: 1.5px solid var(--tiffany-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tiffany-dark);
  letter-spacing: 0.05em;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(13, 148, 136, 0.14);
  animation: floatTag 6s ease-in-out infinite alternate;
}

.tag-one {
  top: -15px;
  right: 10px;
}

.tag-two {
  bottom: -20px;
  left: 10px;
  animation-delay: -3s;
}

@keyframes floatTag {
  0% { transform: translateY(0); }
  100% { transform: translateY(-10px); }
}

/* Infinite Ticker Banner */
.ticker {
  background: var(--tiffany-soft);
  border-y: 1.5px solid var(--border-subtle);
  overflow: hidden;
  padding: 18px 0;
  margin-bottom: 100px;
}

.ticker-track {
  display: flex;
  white-space: nowrap;
  gap: 40px;
  animation: scrollTicker 30s linear infinite;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--tiffany-dark);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.ticker-track span {
  display: inline-flex;
  align-items: center;
  gap: 40px;
}

.ticker-track b {
  color: var(--tiffany-light);
}

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

/* Advantage Cards Grid (大标题大字重) */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 120px;
}

.advantage-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: var(--tiffany-light);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

.card-number {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--tiffany-main);
  margin-bottom: 20px;
  font-weight: 700;
}

.icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--tiffany-soft);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--tiffany-dark);
  margin-bottom: 24px;
  font-weight: bold;
}

.advantage-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.advantage-card p {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.65;
  margin-bottom: 26px;
  flex: 1;
}

.advantage-card a {
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--tiffany-dark);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.advantage-card a:hover {
  gap: 10px;
  color: var(--tiffany-main);
}

/* Pricing Plans Section */
.plans-section {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-y: 1.5px solid var(--border-subtle);
  position: relative;
}

.plan-switch {
  display: inline-flex;
  align-items: center;
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  padding: 4px;
  border-radius: 99px;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.08);
}

.plan-switch button {
  padding: 10px 22px;
  font-size: 14px;
  border-radius: 99px;
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.plan-switch button.active {
  background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
  color: #ffffff;
  font-weight: 700;
}

.plan-switch button small {
  font-size: 11px;
  opacity: 0.9;
  margin-left: 4px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 48px;
}

.plan-card {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 42px 34px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.plan-card:hover {
  transform: translateY(-8px);
  border-color: var(--tiffany-light);
  box-shadow: var(--shadow-card-hover);
}

.plan-card.featured {
  border-color: var(--tiffany-main);
  box-shadow: 0 20px 45px -8px rgba(13, 148, 136, 0.22), 0 0 0 1.5px var(--tiffany-main);
}

.popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
  color: #ffffff;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 99px;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.35);
}

.plan-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--tiffany-dark);
  margin-bottom: 8px;
  font-weight: 600;
}

.plan-card h3 {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 16px;
}

.price strong {
  font-size: 52px;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1;
  color: var(--tiffany-dark);
}

.price span {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1.5px solid var(--border-subtle);
  font-weight: 400;
}

.plan-card ul {
  list-style: none;
  margin-bottom: 36px;
  flex: 1;
}

.plan-card ul li {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 400;
}

.plan-card ul li::before {
  content: '✓';
  font-family: var(--font-mono);
  color: var(--tiffany-main);
  font-weight: 800;
}

.micro-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 32px;
  font-family: var(--font-mono);
  font-weight: 500;
}

/* Audience Use Cases Section */
.audience {
  padding: 100px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.audience-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 36px;
}

.audience-item {
  display: flex;
  gap: 20px;
  padding: 22px;
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.05);
  transition: all var(--transition-fast);
}

.audience-item:hover {
  border-color: var(--tiffany-light);
  transform: translateX(6px);
  box-shadow: 0 8px 24px rgba(13, 148, 136, 0.12);
}

.audience-num {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--tiffany-main);
  font-weight: 700;
}

.audience-item div strong {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.audience-item div p {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.6;
}

/* Clash Tutorial Section */
.tutorial-section {
  padding: 100px 0;
  border-y: 1.5px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.step-card {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-6px);
  border-color: var(--tiffany-light);
  box-shadow: var(--shadow-card-hover);
}

.step-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--tiffany-main);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  display: block;
  font-weight: 700;
}

.step-icon {
  font-size: 30px;
  margin-bottom: 16px;
  color: var(--tiffany-dark);
}

.step-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.65;
  margin-bottom: 22px;
}

.step-card a {
  font-size: 14px;
  color: var(--tiffany-dark);
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Reviews Section */
.reviews-section {
  padding: 100px 0;
}

.review-score {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.review-score strong {
  font-size: 46px;
  font-family: var(--font-mono);
  color: var(--tiffany-dark);
  font-weight: 700;
}

.review-score span {
  font-size: 15px;
  color: var(--tiffany-main);
  font-weight: 600;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.review-card {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
}

.review-card p {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.75;
  margin-bottom: 24px;
}

.review-card footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  border-top: 1.5px solid var(--border-subtle);
  padding-top: 16px;
}

.review-card footer b {
  color: var(--text-primary);
  font-weight: 600;
}

.review-card footer span {
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-section {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-top: 1.5px solid var(--border-subtle);
}

.faq-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 60px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.04);
  transition: all var(--transition-fast);
}

details[open] {
  border-color: var(--tiffany-light);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.1);
}

summary {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary span {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--tiffany-main);
  transition: transform var(--transition-fast);
  font-weight: bold;
}

details[open] summary span {
  transform: rotate(45deg);
  color: var(--tiffany-dark);
}

details p {
  margin-top: 16px;
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.75;
}

/* Articles Directory Preview Section */
.article-preview {
  padding: 100px 0;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--tiffany-light);
  box-shadow: var(--shadow-card-hover);
}

.article-category {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tiffany-main);
  margin-bottom: 14px;
  font-weight: 600;
}

.article-card h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.article-arrow {
  font-family: var(--font-mono);
  font-size: 18px;
  align-self: flex-end;
  color: var(--tiffany-dark);
  font-weight: bold;
}

/* Footer Styling */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1.5px solid var(--border-subtle);
  padding: 80px 0 40px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 3fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 16px;
  line-height: 1.65;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.footer-links div b {
  display: block;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.footer-links div a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 400;
}

.footer-links div a:hover {
  color: var(--tiffany-dark);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1.5px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.footer-bottom a:hover {
  color: var(--tiffany-dark);
}

/* Article Reader Layout (文章阅读页大字号大排版) */
.article-index {
  padding: 60px 0 100px;
}

.article-index-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.article-index-card {
  background: #ffffff;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-fast);
}

.article-index-card:hover {
  border-color: var(--tiffany-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.article-index-card span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tiffany-main);
  margin-bottom: 10px;
  display: block;
  font-weight: 600;
}

.article-index-card h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.article-index-card p {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.6;
}

.article-hero {
  padding: 65px 0 45px;
  border-bottom: 1.5px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 500;
}

.article-hero h1 {
  font-size: 42px;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.article-shell {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 60px;
  padding: 60px 0 100px;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 600;
  margin: 38px 0 18px;
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 26px 0 14px;
  color: var(--text-primary);
}

.article-content p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 22px;
  font-weight: 400;
}

.article-content ul, .article-content ol {
  margin: 0 0 26px 22px;
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 16px;
}

.article-content li {
  margin-bottom: 12px;
  line-height: 1.7;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0 36px;
  font-size: 15px;
}

.article-content th, .article-content td {
  border: 1.5px solid var(--border-subtle);
  padding: 14px 18px;
  text-align: left;
}

.article-content th {
  background: var(--bg-secondary);
  color: var(--tiffany-dark);
  font-family: var(--font-mono);
  font-weight: 700;
}

.article-aside {
  position: sticky;
  top: 100px;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 14px;
}

.article-aside b {
  font-family: var(--font-mono);
  color: var(--tiffany-dark);
  font-size: 12px;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  font-weight: 700;
}

.article-aside a {
  color: var(--text-muted);
  font-weight: 500;
}

.article-aside a:hover {
  color: var(--tiffany-dark);
}

/* Legal Content Layout */
.legal {
  padding: 60px 0 100px;
  max-width: 840px;
}

.legal h1 {
  font-size: 40px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.legal h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 36px 0 16px;
  color: var(--text-primary);
}

.legal p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
  font-weight: 400;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-section, .audience, .faq-layout, .article-shell {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .advantage-grid, .plans-grid, .steps, .review-grid, .article-index-grid {
    grid-template-columns: 1fr;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
  .footer-main {
    grid-template-columns: 1fr;
  }
  .hero-copy h1 {
    font-size: 42px;
  }
}