@charset "UTF-8";
/* ==========================================================
   汉汪科技 · 纯静态版样式（无构建、无框架依赖）
   ========================================================== */

:root {
  --bg: #05060a;
  --bg-2: #070810;
  --bg-3: #0a0a0f;
  --bg-4: #0c0c12;
  --bg-5: #08080c;
  --card: rgba(255, 255, 255, 0.03);
  --card-hover: rgba(255, 255, 255, 0.05);
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.05);
  --text: #ffffff;
  --text-dim: #9ca3af;
  --text-mute: #6b7280;
  --cyan: #22d3ee;
  --cyan-soft: #67e8f9;
  --blue: #60a5fa;
  --purple: #a78bfa;
  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(34, 211, 238, 0.3); }

/* ---------- 布局 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 900px; }
.section { position: relative; padding: 96px 0; overflow: hidden; }
.section > .container { position: relative; z-index: 2; }
.section-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.muted { color: var(--text-mute); font-size: 14px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--cyan); color: #000; padding: 8px 16px; border-radius: 8px;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- 背景装饰 ---------- */
.cyber-grid {
  position: absolute; inset: 0; opacity: 0.4;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.cyber-grid-dim { opacity: 0.25; }
.scanlines {
  position: absolute; inset: 0; opacity: 0.08;
  background-image: repeating-linear-gradient(0deg,
    rgba(34, 211, 238, 0.05) 0px, rgba(34, 211, 238, 0.05) 1px,
    transparent 1px, transparent 4px);
}
.section-store .scanlines { opacity: 0.12; }

.hero-glow { position: absolute; border-radius: 9999px; filter: blur(60px); }
.hero-glow-1 { top: 33%; left: 25%; width: 384px; height: 384px; background: rgba(34, 211, 238, 0.05); }
.hero-glow-2 { bottom: 33%; right: 25%; width: 320px; height: 320px; background: rgba(99, 102, 241, 0.05); }
.hero-glow-3 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.1) 0%, transparent 70%); }
.hero-glow-4 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at top right, rgba(99, 102, 241, 0.08) 0%, transparent 50%); }
.hero-glow-5 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at top, rgba(34, 211, 238, 0.07) 0%, transparent 60%); }
.hero-glow-6 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at bottom left, rgba(99, 102, 241, 0.06) 0%, transparent 55%); }
.hero-glow-7 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at bottom, rgba(34, 211, 238, 0.05) 0%, transparent 70%); }
.hero-glow-8 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.05) 0%, transparent 60%); }
.hero-glow-9 { inset: 0; border-radius: 0; filter: none; background: radial-gradient(ellipse at bottom right, rgba(6, 182, 212, 0.06) 0%, transparent 60%); }

.section-store { background: var(--bg); }
.section-services { background: var(--bg-2); }
.section-portfolio { background: var(--bg-3); }
.section-faq { background: var(--bg-2); }
.section-contact { background: var(--bg-4); }

/* ---------- 图标 ---------- */
.icon {
  width: 20px; height: 20px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}
.icon-dim { opacity: 0.7; width: 14px; height: 14px; }
.icon-brand { color: var(--cyan); filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.7)); }

/* ---------- 导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background-color .3s, border-color .3s, box-shadow .3s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(5, 6, 10, 0.9);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}
.neon-top-bar {
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, .8), rgba(99, 102, 241, .8), transparent);
}
.nav { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; transition: color .2s; }
.brand:hover { color: var(--cyan-soft); }
.brand-logo {
  width: 30px; height: 30px; flex: none;
  filter: drop-shadow(0 0 6px rgba(34, 211, 238, .35));
}
.brand-name { font-size: 17px; letter-spacing: .04em; }
.brand-sub {
  font-size: 11px; font-weight: 500; color: var(--text-mute);
  letter-spacing: .12em; padding-left: 8px; border-left: 1px solid var(--line);
}
@media (max-width: 480px) { .brand-sub { display: none; } }

.nav-links { display: none; align-items: center; gap: 4px; }
.nav-links a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; font-size: 14px; color: var(--text-dim);
  border: 1px solid transparent; border-radius: 10px;
  transition: color .2s, background-color .2s, border-color .2s;
}
.nav-links a:hover,
.nav-links a.is-active { color: var(--cyan-soft); background: rgba(34, 211, 238, 0.08); border-color: rgba(34, 211, 238, 0.2); }

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; padding: 0;
  background: none; border: 0; color: var(--text-dim); cursor: pointer;
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}
@media (max-width: 767px) {
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    display: flex; flex-direction: column; align-items: stretch; gap: 6px;
    padding: 16px 24px 20px;
    background: rgba(5, 6, 10, 0.97);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .nav-links:not(.is-open) { display: none; }
  .nav-links a { padding: 12px 16px; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: 12px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: background-color .25s, color .25s, box-shadow .25s, border-color .25s, transform .25s;
}
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 10px; }
.btn-primary {
  background: linear-gradient(90deg, #06b6d4, #3b82f6); color: #000;
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.35), inset 0 0 12px rgba(34, 211, 238, 0.08);
}
.btn-primary:hover { background: linear-gradient(90deg, #22d3ee, #60a5fa); box-shadow: 0 0 28px rgba(34, 211, 238, 0.55); }
.btn-outline { border-color: rgba(34, 211, 238, 0.3); color: var(--cyan-soft); }
.btn-outline:hover { background: rgba(34, 211, 238, 0.06); border-color: rgba(34, 211, 238, 0.5); }
.btn-ghost {
  background: rgba(34, 211, 238, 0.1); color: var(--cyan-soft); border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.35), inset 0 0 12px rgba(34, 211, 238, 0.08);
}
.btn-ghost:hover { background: rgba(34, 211, 238, 0.2); }
.btn-gold { background: linear-gradient(90deg, #fbbf24, #f97316); color: #000; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-inner { position: relative; z-index: 2; max-width: 900px; padding-top: 120px; padding-bottom: 96px; text-align: center; }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; margin-bottom: 28px;
  border-radius: 9999px; border: 1px solid rgba(34, 211, 238, 0.3);
  background: rgba(34, 211, 238, 0.08); color: var(--cyan-soft); font-size: 14px;
}
.dot-pulse {
  width: 8px; height: 8px; border-radius: 9999px; background: #22d3ee;
  box-shadow: 0 0 10px rgba(34, 211, 238, 1);
  animation: pulse 2s cubic-bezier(.4, 0, .6, 1) infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.hero-badges {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 10px; margin-bottom: 28px;
}
.hero-badges .pill { margin-bottom: 0; }
.hero-brand {
  display: inline-flex; align-items: center; padding: 6px 16px;
  border-radius: 9999px; border: 1px solid rgba(34, 211, 238, .35);
  background: rgba(34, 211, 238, .1); color: var(--cyan-soft);
  font-size: 14px; font-weight: 700; letter-spacing: .14em;
}

.hero-title { font-size: 38px; letter-spacing: -0.02em; margin-bottom: 24px; }
.gradient-text {
  background: linear-gradient(90deg, #22d3ee, #60a5fa, #c084fc);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.35), 0 0 30px rgba(34, 211, 238, 0.2);
}
.hero-desc { color: var(--text-dim); font-size: 18px; max-width: 680px; margin: 0 auto 40px; }
.hero-actions { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: var(--text-mute); animation: bob 1.5s ease-in-out infinite;
}
@keyframes bob { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

@media (min-width: 640px) { .hero-actions { flex-direction: row; justify-content: center; } }
@media (min-width: 768px) { .hero-title { font-size: 56px; } }
@media (min-width: 1024px) { .hero-title { font-size: 68px; } }

/* ---------- 区块标题 ---------- */
.section-head { text-align: center; margin-bottom: 64px; }
.section-head h2 { font-size: 30px; margin-bottom: 16px; }
.section-desc { color: var(--text-dim); max-width: 680px; margin: 0 auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px; margin-bottom: 12px;
  color: var(--cyan); font-size: 14px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
}
.font-tech { letter-spacing: .04em; text-shadow: 0 0 30px rgba(34, 211, 238, .35); }
@media (min-width: 768px) { .section-head h2 { font-size: 40px; } .section-store .section-head h2 { font-size: 46px; } }

/* ---------- 栅格 ---------- */
.grid { display: grid; gap: 20px; }
@media (min-width: 768px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } .grid-4 { grid-template-columns: repeat(4, 1fr); } }

/* ---------- 卡片 ---------- */
.card {
  position: relative; padding: 24px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--line);
  transition: background-color .3s, border-color .3s, transform .3s;
}
.card:hover { background: var(--card-hover); border-color: rgba(34, 211, 238, 0.2); transform: translateY(-4px); }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card h4 { font-size: 16px; margin-bottom: 8px; }
.card-desc { color: var(--text-dim); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.tags li {
  padding: 2px 8px; font-size: 12px; border-radius: 6px;
  background: rgba(255, 255, 255, 0.04); color: var(--text-mute); border: 1px solid var(--line-2);
}
.app-card .tags li { color: rgba(103, 232, 249, .75); border-color: rgba(34, 211, 238, .15); background: rgba(255, 255, 255, .04); }

/* 应用卡片 */
.app-icon {
  width: 56px; height: 56px; border-radius: 16px; padding: 1.5px; margin-bottom: 20px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, .35);
}
.app-icon > .icon { width: 100%; height: 100%; padding: 12px; color: #fff; }
.app-icon-cyan { background: linear-gradient(135deg, #22d3ee, #38bdf8, #3b82f6); }
.app-icon-purple { background: linear-gradient(135deg, #e879f9, #c084fc, #8b5cf6); }
.app-icon-amber { background: linear-gradient(135deg, #fbbf24, #fb923c, #f43f5e); }
.app-icon-emerald { background: linear-gradient(135deg, #34d399, #2dd4bf, #22c55e); }
.app-icon-rose { background: linear-gradient(135deg, #fb7185, #f472b6, #ef4444); }
.app-tagline { color: var(--cyan-soft); font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.app-card .btn { align-self: flex-start; }
.app-card { display: flex; flex-direction: column; }

.qr-row { display: flex; align-items: center; gap: 16px; margin-top: auto; }
.qr-box {
  flex: none; padding: 8px; border-radius: 12px; background: #fff;
  box-shadow: 0 0 24px rgba(34, 211, 238, .18);
}
.qr-box img { width: 96px; height: 96px; object-fit: contain; border-radius: 8px; }
.qr-box-lg { margin: 0 auto 12px; width: 144px; height: 144px; box-shadow: 0 0 28px rgba(59, 130, 246, .2); }
.qr-box-lg img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.qr-tip { color: var(--text-mute); font-size: 12px; margin-top: 8px; }

.card-more {
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  border: 2px dashed rgba(34, 211, 238, .2); background: rgba(34, 211, 238, .02); min-height: 180px;
}
.card-more:hover { border-color: rgba(34, 211, 238, .4); }
.card-more .plus { font-size: 30px; color: rgba(103, 232, 249, .8); margin-bottom: 12px; }
.card-more strong { color: rgba(103, 232, 249, .9); font-weight: 500; }
.card-more .muted { margin-top: 4px; }

/* 服务卡片 */
.service-icon {
  width: 40px; height: 40px; border-radius: 12px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .2); color: var(--cyan);
}
.service-card:hover .service-icon { background: rgba(34, 211, 238, .15); }

/* 案例分类 */
.cat-block + .cat-block { margin-top: 48px; }
.cat-head { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.cat-head h3 { font-size: 20px; }
.cat-badge {
  width: 32px; height: 32px; border-radius: 10px; flex: none;
  display: flex; align-items: center; justify-content: center; color: #fff;
}
.cat-badge .icon { width: 16px; height: 16px; }
.cat-cyan { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.cat-green { background: linear-gradient(135deg, #22c55e, #10b981); }
.cat-purple { background: linear-gradient(135deg, #a855f7, #ec4899); }
.cat-orange { background: linear-gradient(135deg, #f97316, #eab308); }
.mini-card { padding: 20px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .25s, background-color .25s;
}
.faq-item[open] { border-color: rgba(34, 211, 238, .25); background: rgba(34, 211, 238, .04); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 24px; cursor: pointer; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary h3 { font-size: 16px; font-weight: 600; }
.faq-item summary::after {
  content: ""; flex: none; width: 8px; height: 8px; margin-left: auto;
  border-right: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg); transition: transform .25s;
}
.faq-item[open] summary::after { transform: rotate(225deg); }
.faq-item summary:hover h3 { color: var(--cyan-soft); }
.faq-body { padding: 0 24px 20px; color: var(--text-dim); font-size: 15px; line-height: 1.75; }
.faq-body a { color: var(--cyan-soft); text-decoration: underline; }

/* ---------- 线框地球（纯 SVG + CSS 动画，无第三方库） ---------- */
.globe-block {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  margin-bottom: 44px;
}
.globe { width: 170px; height: 170px; overflow: visible; }

.globe-outline,
.globe-lat,
.globe-mer,
.globe-ring {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.2;
  transform-box: fill-box;
  transform-origin: center;
}
.globe-outline { stroke-opacity: .5; }
.globe-lat { stroke-opacity: .26; }
.globe-ring { stroke-opacity: .18; stroke-dasharray: 4 9; animation: globeRing 45s linear infinite; }

/* 经线：横向缩放循环，形成自转错觉；4 条错开延时 */
.globe-mer { stroke-opacity: .34; animation: globeSpin 12s linear infinite; }
.globe-mer-2 { animation-delay: -3s; }
.globe-mer-3 { animation-delay: -6s; }
.globe-mer-4 { animation-delay: -9s; }

@keyframes globeSpin {
  0%   { transform: scaleX(0); }
  25%  { transform: scaleX(1); }
  50%  { transform: scaleX(0); }
  75%  { transform: scaleX(-1); }
  100% { transform: scaleX(0); }
}
@keyframes globeRing { to { transform: rotate(360deg); } }

.globe-caption {
  color: var(--text-dim); font-size: 14px; letter-spacing: .08em; text-align: center;
}

@media (max-width: 640px) { .globe { width: 138px; height: 138px; } }

/* ---------- 联系 ---------- */
.contact-grid { margin-bottom: 48px; }
.contact-card { text-align: center; display: flex; flex-direction: column; align-items: center; }
.contact-icon {
  width: 48px; height: 48px; border-radius: 14px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
}
.contact-icon-cyan { background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .2); color: var(--cyan); }
.contact-icon-blue { background: rgba(59, 130, 246, .1); border: 1px solid rgba(59, 130, 246, .2); color: var(--blue); }
.contact-icon-purple { background: rgba(168, 85, 247, .1); border: 1px solid rgba(168, 85, 247, .2); color: var(--purple); }
.contact-icon-emerald { background: rgba(16, 185, 129, .1); border: 1px solid rgba(16, 185, 129, .2); color: #34d399; }
.contact-email { font-size: 15px; word-break: break-all; }
.contact-sub { margin-top: 8px; font-size: 13px; }
.contact-strong { color: var(--cyan); font-size: 18px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.cta-card {
  position: relative; overflow: hidden;
  padding: 40px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(34, 211, 238, .1), rgba(59, 130, 246, .05), rgba(168, 85, 247, .1));
  border: 1px solid rgba(34, 211, 238, .2);
  display: flex; flex-direction: column; gap: 24px; align-items: flex-start;
}
.cta-card h3 { font-size: 26px; margin-bottom: 12px; }
.cta-card .muted { max-width: 480px; }
@media (min-width: 768px) {
  .cta-card { flex-direction: row; align-items: center; justify-content: space-between; padding: 48px; }
  .cta-card h3 { font-size: 30px; }
}

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-5); border-top: 1px solid rgba(255, 255, 255, .04); }
.footer-inner {
  display: flex; flex-direction: column; gap: 16px; align-items: center; justify-content: space-between;
  padding-top: 32px; padding-bottom: 32px;
}
.footer-inner p { display: flex; align-items: center; gap: 8px; }
.footer-inner a { color: var(--text-dim); }
.footer-inner a:hover { color: var(--cyan-soft); }
@media (min-width: 768px) { .footer-inner { flex-direction: row; } }

/* ---------- 语言切换 ---------- */
.lang-switch {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; padding: 8px 12px; margin-left: 4px;
  font-size: 13px; font-weight: 600; letter-spacing: .02em;
  color: var(--text-dim); border: 1px solid var(--line); border-radius: 10px;
  transition: color .2s, border-color .2s, background-color .2s;
}
.lang-switch:hover { color: var(--cyan-soft); border-color: rgba(34, 211, 238, .35); background: rgba(34, 211, 238, .08); }
@media (max-width: 767px) { .lang-switch { justify-content: flex-start; } }

.lang-banner {
  position: fixed; left: 50%; bottom: 24px; z-index: 60;
  transform: translate(-50%, 20px); opacity: 0;
  display: flex; align-items: center; gap: 12px;
  max-width: calc(100vw - 32px);
  padding: 12px 14px 12px 18px; border-radius: 14px;
  background: rgba(8, 10, 18, .96); border: 1px solid rgba(34, 211, 238, .3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .55);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  transition: opacity .3s ease, transform .3s ease;
}
.lang-banner.is-show { opacity: 1; transform: translate(-50%, 0); }
.lang-banner-msg { font-size: 14px; color: var(--text-dim); }
.lang-banner-btn {
  flex: none; padding: 6px 14px; border-radius: 9px; font-size: 14px; font-weight: 600;
  color: #000; background: linear-gradient(90deg, #06b6d4, #3b82f6);
}
.lang-banner-btn:hover { background: linear-gradient(90deg, #22d3ee, #60a5fa); }
.lang-banner-close {
  flex: none; width: 26px; height: 26px; padding: 0; margin: 0;
  background: none; border: 0; cursor: pointer;
  color: var(--text-mute); font-size: 20px; line-height: 1;
}
.lang-banner-close:hover { color: var(--text); }

/* ---------- 滚动入场动画（仅在 JS 可用时生效，保证无 JS 也完整可读） ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-hint, .dot-pulse { animation: none; }
  /* 地球：停转，但把 4 条经线固定在不同位置，保持静态线框地球的样子 */
  .globe-mer, .globe-ring { animation: none; }
  .globe-mer-1 { transform: scaleX(.2); }
  .globe-mer-2 { transform: scaleX(.55); }
  .globe-mer-3 { transform: scaleX(.85); }
  .globe-mer-4 { transform: scaleX(-.55); }
}