/* ═══════════════════════════════════════════════════════════
   LiveAI — 首页 & 公开页专属样式
   ═══════════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── 公告横幅 ── */
.announcement-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 9px 16px;
  background: linear-gradient(90deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  position: relative;
  z-index: 1100;
  line-height: 1.4;
  text-align: center;
  flex-wrap: wrap;
}
.announcement-bar a {
  color: #fff;
  text-decoration: underline;
  white-space: nowrap;
}
.announcement-bar a:hover { opacity: .8; }
.announcement-bar-close {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: rgba(255,255,255,.75);
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
  flex-shrink: 0;
}
.announcement-bar-close:hover { color: #fff; }
@media (max-width: 640px) {
  .announcement-bar { font-size: 12px; padding: 8px 36px 8px 12px; min-height: 44px; }
}
@media (max-width: 360px) {
  .announcement-bar { font-size: 11px; padding: 8px 32px 8px 8px; }
}

/* 全站细滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.35); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99,102,241,0.6); }
::-webkit-scrollbar-button { display: none; } /* 隐藏上下箭头按钮 */

:root {
  --bg: #000000;
  --bg-card: #0d0d0d;
  --bg-card2: #111118;
  --border: rgba(255,255,255,0.08);
  --border-glow: rgba(99,102,241,0.5);
  --grad: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
  --grad-text: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --c-primary: #6366f1;
  --c-purple: #a855f7;
  --c-pink: #ec4899;
  --c-white: #ffffff;
  --c-gray: rgba(255,255,255,0.6);
  --c-gray2: rgba(255,255,255,0.35);
  --nav-h: 72px;
  --radius: 16px;
  --shadow-glow: 0 0 30px rgba(99,102,241,0.25);
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--c-white);
  font-family: "PingFangSC", "苹方", "Microsoft YaHei", Inter, system-ui, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── 导航栏 ─────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: border-bottom .3s, background .3s;
}
.nav.scrolled {
  background: rgba(0,0,0,0.85);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.nav-logo svg { width: 40px; height: 40px; flex-shrink: 0; }
.nav-logo-text {
  font-size: 22px; font-weight: 800; letter-spacing: .3px;
  background: linear-gradient(135deg, #22d3ee 0%, #6366f1 50%, #a855f7 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.nav-links {
  display: flex; align-items: center; gap: 28px;
  list-style: none;
}
.nav-links a {
  color: var(--c-gray);
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
  transition: color .2s;
}
.nav-links a:hover { color: var(--c-white); }

.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn-outline {
  padding: 8px 20px; border: 1px solid var(--border-glow);
  border-radius: 8px; color: var(--c-white); background: transparent;
  font-size: 14px; cursor: pointer; text-decoration: none;
  white-space: nowrap;
  transition: background .2s, border-color .2s;
}
.btn-outline:hover { background: rgba(99,102,241,0.1); border-color: var(--c-primary); }
.btn-primary {
  padding: 8px 22px;
  background: var(--grad); border: none; border-radius: 8px;
  color: #fff; font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; white-space: nowrap;
  transition: opacity .2s, transform .2s;
}
.btn-primary:hover { opacity: .88; transform: translateY(-1px); }

/* ── Hero ────────────────────────────────── */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: 120px 24px 80px;
  overflow: hidden;
}
#hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}
.hero-glow {
  position: absolute; border-radius: 50%; pointer-events: none;
  filter: blur(120px); opacity: .35;
}
.hero-glow-1 { width: 600px; height: 600px; background: #6366f1; top: -150px; left: -100px; }
.hero-glow-2 { width: 500px; height: 500px; background: #ec4899; bottom: -100px; right: -80px; }

.hero-content { position: relative; z-index: 1; max-width: 860px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: 999px;
  border: 1px solid rgba(99,102,241,.4);
  background: rgba(99,102,241,.1);
  font-size: 13px; color: #a5b4fc; margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800; line-height: 1.1; letter-spacing: -1px;
  margin-bottom: 20px;
}
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--c-gray); max-width: 560px; margin: 0 auto 40px;
}
.hero-cta { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn-hero {
  padding: 14px 36px; border-radius: 12px; font-size: 16px; font-weight: 600;
  cursor: pointer; text-decoration: none; transition: all .2s;
}
.btn-hero-primary {
  background: var(--grad); color: #fff; border: none;
  box-shadow: 0 4px 24px rgba(99,102,241,.4);
}
.btn-hero-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(99,102,241,.55); }
.btn-hero-secondary {
  background: rgba(255,255,255,.07); color: #fff;
  border: 1px solid var(--border);
}
.btn-hero-secondary:hover { background: rgba(255,255,255,.12); }

.hero-divider {
  position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, #6366f1, #ec4899, transparent);
  opacity: .6;
}

/* ── Section 通用 ────────────────────────── */
section { padding: 100px 48px; }
.section-title {
  text-align: center; font-size: clamp(28px, 4vw, 44px);
  font-weight: 800; margin-bottom: 12px;
}
.section-sub {
  text-align: center; color: var(--c-gray);
  font-size: 17px; max-width: 540px; margin: 0 auto 56px;
}

/* ── 功能卡片 ────────────────────────────── */
.features { background: var(--bg); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.feature-card {
  padding: 32px 28px; border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: border-color .3s, box-shadow .3s, transform .3s;
}
.feature-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 18px; flex-shrink: 0;
}
.feature-card:nth-child(1) .feature-icon { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #10b981, #34d399); }
.feature-card:nth-child(4) .feature-icon { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.feature-card:nth-child(5) .feature-icon { background: linear-gradient(135deg, #ec4899, #f43f5e); }
.feature-card:nth-child(6) .feature-icon { background: linear-gradient(135deg, #a855f7, #6366f1); }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--c-text); }
.feature-card p { color: var(--c-gray); font-size: 14px; line-height: 1.7; }
a.feature-card { text-decoration: none; color: inherit; display: flex; flex-direction: column; }

/* ── 关于我们 ────────────────────────────── */
.about { background: var(--bg); position: relative; overflow: hidden; }
#contact-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}

.about > .section-title,
.about > .section-sub,
.about > .marquee-wrap { position: relative; z-index: 1; }

/* 跑马灯容器 — 边缘透明遮罩 */
.marquee-wrap {
  overflow: hidden;
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 0 28px;
  mask-image: linear-gradient(to right, transparent 0%, #000 13%, #000 87%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 13%, #000 87%, transparent 100%);
}

/* 跑马灯轨道 */
.about-grid {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-rtl 30s linear infinite;
}
.marquee-wrap:hover .about-grid {
  animation-play-state: paused;
}
@keyframes marquee-rtl {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* 人物卡片 */
.person-card {
  width: 280px; flex-shrink: 0;
  border-radius: var(--radius);
  background: var(--bg-card2);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s, transform .35s, opacity .3s;
  cursor: default;
}
/* 悬停区域内：其他卡片半透明收缩，当前卡片高亮浮起 */
.marquee-wrap:hover .person-card {
  opacity: 0.38;
  transform: scale(0.96);
}
.marquee-wrap:hover .person-card:hover {
  opacity: 1;
  transform: translateY(-8px) scale(1.03);
  border-color: rgba(168,85,247,.75);
  box-shadow: 0 0 48px rgba(168,85,247,.28), 0 12px 40px rgba(0,0,0,.5);
}
.person-photo-wrap {
  position: relative; overflow: hidden;
  aspect-ratio: 1/1;
}
.person-photo-wrap img,
.person-avatar-placeholder {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform .4s ease;
}
.marquee-wrap:hover .person-card:hover .person-photo-wrap img,
.marquee-wrap:hover .person-card:hover .person-avatar-placeholder { transform: scale(1.08); }
.person-avatar-placeholder {
  background: linear-gradient(135deg, #1e1b4b, #4c1d95, #701a75);
  display: flex; align-items: center; justify-content: center;
  font-size: 48px; color: rgba(255,255,255,.4);
}
.person-body { padding: 22px 20px; }
.person-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.person-title {
  font-size: 13px; font-weight: 500; margin-bottom: 12px;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
.person-bio {
  font-size: 13px; color: var(--c-gray); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; transition: all .4s ease;
}
.marquee-wrap:hover .person-card:hover .person-bio {
  -webkit-line-clamp: unset; overflow: visible;
}
/* 移动端 */
@media (max-width: 900px) {
  .about-grid { gap: 16px; }
  .person-card { scroll-snap-align: start; }
}

/* ── 统计区 ──────────────────────────────── */
.stats { background: var(--bg); }
.stats-grid {
  display: flex; justify-content: center; gap: 80px;
  flex-wrap: wrap; max-width: 900px; margin: 0 auto;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: clamp(40px, 5vw, 60px); font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-label { color: var(--c-gray); font-size: 15px; margin-top: 6px; }

/* ── CTA 横幅 ────────────────────────────── */
.cta-banner {
  padding: 100px 48px; text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, #0a0010 100%);
  position: relative; overflow: hidden;
}
.cta-banner-glow {
  position: absolute; width: 700px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,.25) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%,-50%);
  pointer-events: none;
}
.cta-banner h2 { font-size: clamp(28px, 4vw, 48px); font-weight: 800; margin-bottom: 16px; }
.cta-banner p { color: var(--c-gray); font-size: 17px; margin-bottom: 36px; }

/* ── Footer ──────────────────────────────── */
.footer {
  border-top: 1px solid var(--border); padding: 40px 48px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.footer-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.footer-logo svg { width: 28px; height: 28px; }
.footer-logo span {
  font-size: 16px; font-weight: 700;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer p { color: var(--c-gray2); font-size: 13px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--c-gray2); text-decoration: none; font-size: 13px; }
.footer-links a:hover { color: var(--c-white); }

/* ── 入场动画 ────────────────────────────── */
.fade-up { opacity: 0; transform: translateY(32px); transition: opacity .7s ease, transform .7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── 定价页 ──────────────────────────────── */
#pricing-canvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}
.pricing-glow {
  position: fixed; border-radius: 50%; pointer-events: none;
  filter: blur(120px); opacity: .35; z-index: 0;
}
.pricing-glow-1 { width: 600px; height: 600px; background: #6366f1; top: -150px; right: -100px; }
.pricing-glow-2 { width: 500px; height: 500px; background: #ec4899; bottom: -100px; left: -80px; }
.pricing-hero, .pricing-grid, .compare-table, .faq, .footer {
  position: relative; z-index: 1;
}
.pricing-hero {
  padding: 120px 48px 36px; text-align: center;
}
.pricing-grid {
  display: flex; justify-content: center; gap: 20px;
  flex-wrap: wrap; max-width: 1300px; margin: 0 auto; padding: 0 24px 40px;
}
.plan-card {
  width: 220px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 32px 24px; text-align: center; position: relative;
  transition: border-color .3s, box-shadow .3s, transform .3s;
}
.plan-card:hover { transform: translateY(-4px); }
.plan-card.popular {
  border-color: var(--c-purple);
  box-shadow: 0 0 40px rgba(168,85,247,.3);
}
.plan-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--grad); padding: 4px 18px; border-radius: 999px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
}
.plan-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.plan-tag {
  font-size: 12px; color: #22c55e; background: rgba(34,197,94,.1);
  padding: 2px 10px; border-radius: 999px; display: inline-block; margin-bottom: 20px;
}
.plan-price { font-size: 38px; font-weight: 800; line-height: 1; margin-bottom: 4px; }
.plan-price sup { font-size: 20px; vertical-align: top; margin-top: 6px; }
.plan-period { font-size: 12px; color: var(--c-gray); margin-bottom: 20px; }
.plan-quota { font-size: 28px; font-weight: 700; margin-bottom: 4px;
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.plan-quota-label { font-size: 12px; color: var(--c-gray); margin-bottom: 24px; }
.btn-plan {
  width: 100%; padding: 12px; border-radius: 10px; font-size: 14px;
  font-weight: 600; cursor: pointer; border: none; transition: all .2s;
  text-decoration: none; display: block;
}
.btn-plan-outline {
  background: transparent; border: 1px solid var(--border-glow);
  color: var(--c-white);
}
.btn-plan-outline:hover { background: rgba(99,102,241,.1); }
.btn-plan-grad { background: var(--grad); color: #fff; }
.btn-plan-grad:hover { opacity: .88; transform: translateY(-1px); }

/* 功能对比表 */
.compare-table { max-width: 860px; margin: 0 auto; padding: 0 24px 60px; }
.compare-table-title { text-align: center; font-size: 22px; font-weight: 700; margin-bottom: 24px; color: var(--c-white); }
.compare-table table { width: 100%; border-collapse: collapse; }
.compare-table th, .compare-table td {
  padding: 14px 18px; text-align: center; border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.compare-table th { color: var(--c-gray); font-weight: 600; }
.compare-table td:first-child { text-align: left; color: var(--c-gray); }
.compare-table .check { color: #22c55e; font-size: 16px; }
.compare-table .cross { color: rgba(255,255,255,.2); }

/* 定价页 USP 标签行 */
.pricing-usp {
  display: flex; align-items: center; justify-content: center; gap: 24px;
  flex-wrap: wrap; margin-top: 10px; margin-bottom: 32px;
  font-size: 13px; color: var(--c-gray2);
}
.pricing-usp-item { display: flex; align-items: center; gap: 5px; }
.pricing-usp-item::before { content: '✓'; color: #22c55e; font-weight: 700; }

/* 周期切换 Tab */
.period-switcher {
  display: inline-flex; gap: 4px; padding: 4px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px; margin-bottom: 36px;
}
.period-btn {
  padding: 8px 26px; border: none; border-radius: 9px;
  background: transparent; color: var(--c-gray);
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .2s; white-space: nowrap;
}
.period-btn.active { background: var(--grad); color: #fff; box-shadow: 0 2px 12px rgba(99,102,241,.4); }
.period-save-badge {
  font-size: 11px; padding: 2px 7px; border-radius: 999px;
  background: rgba(34,197,94,.2); color: #22c55e; margin-left: 5px; font-weight: 700;
  vertical-align: middle;
}

/* 年付原价划线 & 月均 */
.plan-price-orig { font-size: 13px; color: var(--c-gray2); text-decoration: line-through; margin-top: 2px; min-height: 18px; }
.plan-period-note { font-size: 11px; color: #22c55e; min-height: 16px; }

/* 支付方式行 */
.pricing-pay-row {
  text-align: center; padding: 0 24px 40px;
  position: relative; z-index: 1;
}
.pricing-pay-label {
  font-size: 13px; color: var(--c-gray2); margin-bottom: 14px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.pricing-pay-label::before, .pricing-pay-label::after {
  content: ''; flex: 1; max-width: 80px; height: 1px; background: var(--border);
}
.pricing-pay-icons { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.pay-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 18px; border-radius: 10px;
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  font-size: 13px; color: var(--c-gray); transition: border-color .2s;
}
.pay-chip:hover { border-color: rgba(255,255,255,.2); }
.pay-chip-alipay { color: #1677ff; font-size: 19px; }
.pay-chip-wechat { color: #07c160; font-size: 19px; }

/* 可信度统计行 */
.pricing-trust-row {
  display: flex; justify-content: center; align-items: stretch; gap: 0;
  max-width: 680px; margin: 0 auto 52px;
  padding: 0 24px;
  position: relative; z-index: 1;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); overflow: hidden;
}
.pricing-trust-item {
  flex: 1; text-align: center; padding: 28px 20px;
  border-right: 1px solid var(--border);
}
.pricing-trust-item:last-child { border-right: none; }
.pricing-trust-num {
  font-size: 32px; font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; line-height: 1;
}
.pricing-trust-label { color: var(--c-gray); font-size: 13px; margin-top: 6px; }

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; padding: 0 24px 72px; }
.faq h3 { text-align: center; font-size: 24px; margin-bottom: 24px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; background: none; border: none; color: var(--c-white);
  padding: 20px 0; font-size: 15px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; text-align: left;
}
.faq-q .icon { font-size: 18px; transition: transform .3s; flex-shrink: 0; color: var(--c-gray); }
.faq-item.open .faq-q .icon { transform: rotate(45deg); color: var(--c-primary); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
  color: var(--c-gray); font-size: 14px; line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 18px; }

/* ── 人物卡片头像背景 ────────────────────── */
.anime-avatar {
  display: flex; align-items: center; justify-content: center;
  font-size: 0 !important;
}
.av1 { background: linear-gradient(145deg, #1e0b4b, #3b0764, #6d28d9, #7c3aed); }
.av2 { background: linear-gradient(145deg, #0c1445, #1e3a8a, #1d4ed8, #3b82f6); }
.av3 { background: linear-gradient(145deg, #4a0520, #831843, #be185d, #ec4899); }
.av4 { background: linear-gradient(145deg, #022c22, #065f46, #047857, #10b981); }

/* 悬停时头像区域微光 */
.person-card:hover .av1 { box-shadow: 0 0 24px rgba(124,58,237,.5) inset; }
.person-card:hover .av2 { box-shadow: 0 0 24px rgba(29,78,216,.5) inset; }
.person-card:hover .av3 { box-shadow: 0 0 24px rgba(190,24,93,.5) inset; }
.person-card:hover .av4 { box-shadow: 0 0 24px rgba(4,120,87,.5) inset; }

/* 联系标签 */
.person-contact { margin-top: 10px; }
.contact-tag {
  display: inline-block; font-size: 11px;
  color: rgba(255,255,255,.5);
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  padding: 3px 10px; border-radius: 999px;
}


/* ════════════════════════════════════════════
   首页移动端响应式
   ════════════════════════════════════════════ */

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  background: none; border: none; color: var(--c-white);
  font-size: 28px; cursor: pointer; padding: 4px; line-height: 1;
  flex-shrink: 0;
}

/* 全屏移动菜单 */
.nav-mobile-menu {
  display: none;
  position: fixed; inset: 0; z-index: 998;
  background: rgba(0,0,0,0.96);
  flex-direction: column; align-items: center; justify-content: center;
  gap: 40px;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu > a {
  color: var(--c-white); font-size: 24px; font-weight: 600;
  text-decoration: none; transition: color .2s; padding: 4px 0;
}
.nav-mobile-menu > a:hover { color: #a5b4fc; }
.nav-mobile-actions {
  display: flex; flex-direction: column; gap: 14px;
  align-items: center; margin-top: 8px;
}
.nav-mobile-actions a {
  font-size: 15px !important; padding: 12px 52px !important;
  border-radius: 10px; display: block;
}
.nav-mobile-close {
  position: absolute; top: 22px; right: 22px;
  background: none; border: none; color: rgba(255,255,255,.7);
  font-size: 34px; cursor: pointer; line-height: 1; padding: 4px;
  transition: color .2s;
}
.nav-mobile-close:hover { color: var(--c-white); }

/* 中等屏幕：导航项间距收窄 */
@media (max-width: 1080px) and (min-width: 769px) {
  .nav { padding: 0 28px; }
  .nav-links { gap: 20px; }
}

@media (max-width: 768px) {
  /* 导航 */
  .nav { padding: 0 20px; height: 60px; }
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: flex; align-items: center; }

  /* Hero */
  .hero { padding: 90px 20px 50px; }
  .hero-glow-1 { width: 240px; height: 240px; }
  .hero-glow-2 { width: 200px; height: 200px; }
  .hero-title { font-size: clamp(32px, 9vw, 52px); }
  .hero-sub { font-size: 14px; }
  .hero-cta { flex-direction: column; align-items: center; gap: 12px; }
  .btn-hero { width: 100%; max-width: 320px; text-align: center; }

  /* Section 通用 */
  section { padding: 50px 20px; }
  .cta-banner { padding: 50px 20px; }
  .section-title { font-size: clamp(22px, 6vw, 32px); }

  /* 功能卡：单列 */
  .features-grid { grid-template-columns: 1fr; gap: 12px; }
  .feature-card { flex-direction: row; align-items: flex-start; gap: 14px; }
  .feature-icon { margin-bottom: 0; }

  /* 统计区 */
  .stats-grid { gap: 28px; grid-template-columns: repeat(2, 1fr); }
  .stats-num { font-size: 28px; }

  /* Footer */
  .footer {
    padding: 24px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .footer-links { flex-wrap: wrap; gap: 12px; }

  /* 定价页 */
  .pricing-hero { padding: 90px 20px 24px; }
  .pricing-hero h1 { font-size: clamp(26px, 7vw, 40px); }
  .pricing-grid { padding: 0 16px 28px; flex-direction: column; align-items: center; }
  .plan-card { width: 100%; max-width: 380px; }
  .compare-table { padding: 0 16px 32px; overflow-x: auto; }
  .compare-table table { min-width: 480px; }
  .faq { padding: 0 16px 40px; }
  .period-switcher { flex-wrap: wrap; justify-content: center; }
  .pricing-trust-row { flex-direction: column; max-width: 320px; border-radius: 14px; }
  .pricing-trust-item { border-right: none !important; border-bottom: 1px solid rgba(255,255,255,.07); }
  .pricing-trust-item:last-child { border-bottom: none; }
  .pricing-pay-row { flex-wrap: wrap; justify-content: center; gap: 6px; }
  .pricing-usp { flex-wrap: wrap; justify-content: center; gap: 6px; }

  /* 认证页 */
  .auth-left { display: none; }
  .auth-right { flex: 1; border-left: none; }
}

/* ── 语言切换器 ─────────────────────────────── */
.lang-switcher {
  display: inline-flex; align-items: center; gap: 2px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 8px; padding: 3px; flex-shrink: 0;
}
.lang-btn {
  padding: 6px 10px; border: none; border-radius: 5px;
  background: transparent; color: rgba(255,255,255,.5);
  font-size: 12px; font-weight: 700; cursor: pointer;
  transition: all .2s; white-space: nowrap; letter-spacing: .3px;
  min-height: 32px;
}
.lang-btn:hover { color: #fff; background: rgba(255,255,255,.1); }
.lang-btn.active { background: rgba(99,102,241,.3); color: #c4b5fd; }

/* 移动端隐藏导航区时仍保留切换器 */
@media (max-width: 768px) {
  .nav-lang { display: none; }
  .nav-mobile-lang {
    display: flex; justify-content: center; margin-top: -8px;
  }
}

/* ── 浮动促销弹窗 ── */
.promo-float {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 2000;
  width: 280px;
  background: linear-gradient(135deg, #1e1b4b 0%, #2d1b69 100%);
  border: 1px solid rgba(99,102,241,.4);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,.5);
  overflow: hidden;
  animation: promo-float-in .3s cubic-bezier(.34,1.56,.64,1);
}
@keyframes promo-float-in {
  from { opacity: 0; transform: translateY(20px) scale(.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.promo-float-img {
  width: 100%; height: 130px; object-fit: cover; display: block;
}
.promo-float-body {
  padding: 14px 16px 16px;
}
.promo-float-text {
  font-size: 13px; color: #e0e7ff; line-height: 1.5;
  margin-bottom: 12px;
}
.promo-float-btn {
  display: block; width: 100%; text-align: center;
  padding: 9px 0;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #fff; border-radius: 8px;
  font-size: 13px; font-weight: 700;
  text-decoration: none; cursor: pointer; border: none;
  transition: opacity .2s;
}
.promo-float-btn:hover { opacity: .85; }
.promo-float-close {
  position: absolute; top: 8px; right: 8px;
  background: rgba(0,0,0,.4); border: none; color: #fff;
  width: 26px; height: 26px; border-radius: 50%;
  font-size: 14px; cursor: pointer; line-height: 26px; text-align: center;
  transition: background .2s;
}
.promo-float-close:hover { background: rgba(0,0,0,.65); }
@media (max-width: 480px) {
  .promo-float { width: calc(100vw - 32px); right: 16px; bottom: 16px; }
}
@media (max-width: 360px) {
  .promo-float { width: calc(100vw - 24px); right: 12px; bottom: 12px; }
  .promo-float-text { font-size: 12px; }
}