/* ============================================================
   椰鲁智能官网 · 设计系统 v3 —— Deep Tech / Holographic
   字体：Orbitron（品牌与标识）· Chakra Petch（标题）·
        Noto Sans SC（正文）· JetBrains Mono（数据与代码）
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #05070F;
  --bg-2: #070B16;
  --panel: #0A1020;
  --panel-2: #0C1424;

  --surface: rgba(140, 180, 255, .045);
  --surface-2: rgba(140, 180, 255, .075);
  --surface-3: rgba(140, 180, 255, .115);
  --line: rgba(120, 170, 255, .14);
  --line-2: rgba(120, 200, 255, .30);

  --ink: #E8F1FF;
  --ink-2: #A6B8D6;
  --ink-3: #6A7E9F;
  --ink-4: #45546F;

  --cyan: #22E3FF;
  --blue: #3D7BFF;
  --violet: #8B5CF6;
  --teal: #22E3FF;

  --brand: var(--cyan);
  --grad: linear-gradient(100deg, #22E3FF 0%, #3D7BFF 48%, #8B5CF6 100%);
  --grad-soft: linear-gradient(100deg, rgba(34, 227, 255, .16), rgba(139, 92, 246, .16));

  --glow-cyan: 0 0 24px rgba(34, 227, 255, .45);
  --shadow-1: 0 2px 8px rgba(0, 0, 0, .4);
  --shadow-2: 0 18px 48px -18px rgba(0, 0, 0, .85);
  --shadow-3: 0 30px 80px -30px rgba(0, 0, 0, .95);

  --f-brand: 'Orbitron', 'Chakra Petch', 'Noto Sans SC', sans-serif;
  --f-display: 'Chakra Petch', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --f-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --r-sm: 8px;
  --r: 14px;
  --r-lg: 20px;
  --r-xl: 26px;

  --header-h: 72px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 15.6px;
  line-height: 1.78;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 全局网格 + 极光背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 170, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 170, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 20%, transparent 78%);
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(520px 420px at 12% 8%, rgba(34, 227, 255, .10), transparent 70%),
    radial-gradient(560px 460px at 88% 14%, rgba(139, 92, 246, .10), transparent 72%),
    radial-gradient(680px 520px at 50% 100%, rgba(61, 123, 255, .08), transparent 70%);
}
body > * { position: relative; z-index: 1; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .22s var(--ease); }
ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, h5 {
  font-family: var(--f-display);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.005em;
  line-height: 1.24;
  margin: 0 0 12px;
}
h1 { font-size: clamp(32px, 4.4vw, 54px); line-height: 1.12; letter-spacing: -.02em; }
h2 { font-size: clamp(25px, 2.9vw, 37px); letter-spacing: -.015em; }
h3 { font-size: 19.5px; }
h4 { font-size: 16.5px; }
p { margin: 0 0 12px; }

::selection { background: rgba(34, 227, 255, .32); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(34, 227, 255, .5), rgba(139, 92, 246, .5));
  border-radius: 8px; border: 2px solid var(--bg);
}

/* ---------- 通用容器 ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 104px 0; position: relative; }
.section--tight { padding: 64px 0; }
.section--soft {
  background:
    linear-gradient(180deg, transparent, rgba(10, 16, 32, .8) 22%, rgba(10, 16, 32, .8) 78%, transparent);
}
.section--dark {
  background: linear-gradient(180deg, #060A14, #080D1B 50%, #060A14);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ---------- 技术关键词滚动条 ---------- */
.ticker {
  position: relative; overflow: hidden;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(34, 227, 255, .06), rgba(139, 92, 246, .05));
}
.ticker::before, .ticker::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 120px; z-index: 2; pointer-events: none;
}
.ticker::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.ticker::after { right: 0; background: linear-gradient(270deg, var(--bg), transparent); }
.ticker-inner { display: flex; width: max-content; animation: tickerMove 38s linear infinite; }
.ticker:hover .ticker-inner { animation-play-state: paused; }
.ticker-group { display: flex; align-items: center; gap: 34px; padding-right: 34px; }
.ticker-group span {
  font-family: var(--f-mono); font-size: 12.4px; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); white-space: nowrap;
}
.ticker-group span.dot { color: var(--cyan); }
@keyframes tickerMove { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* 区块标题 */
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { margin-bottom: 14px; }
.lead { color: var(--ink-2); font-size: 16.6px; line-height: 1.85; margin: 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-mono);
  font-size: 11.5px; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--cyan);
  padding: 6px 14px 6px 12px;
  margin-bottom: 18px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(34, 227, 255, .07);
  position: relative;
}
.eyebrow::before {
  content: ''; width: 5px; height: 5px; border-radius: 50%;
  background: var(--cyan); box-shadow: var(--glow-cyan);
}
.eyebrow svg { color: var(--cyan); }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 120;
  height: 2px; width: 0;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(34, 227, 255, .8);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--f-display);
  font-size: 15px; font-weight: 600; letter-spacing: .01em;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  position: relative; overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
}
.btn svg { flex-shrink: 0; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--grad);
  color: #04101F;
  box-shadow: 0 10px 30px -12px rgba(34, 227, 255, .55), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.btn-primary::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, .55) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform .6s var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(34, 227, 255, .8); }
.btn-primary:hover::after { transform: translateX(120%); }

.btn-light {
  background: rgba(255, 255, 255, .07);
  color: var(--ink);
  border-color: var(--line-2);
  backdrop-filter: blur(8px);
}
.btn-light:hover {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(34, 227, 255, .5);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -14px rgba(34, 227, 255, .5);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--line);
}
.btn-ghost:hover {
  color: var(--cyan);
  border-color: var(--line-2);
  background: rgba(34, 227, 255, .06);
}

.btn-sm { padding: 9px 18px; font-size: 13.6px; }
.btn-block { width: 100%; }
.btn-text {
  background: none; border: none; padding: 6px 10px;
  color: var(--ink-2); font-size: 14px; cursor: pointer;
}
.btn-text:hover { color: var(--cyan); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5, 7, 15, .72);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid var(--line);
}
.site-header::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 227, 255, .55), rgba(139, 92, 246, .55), transparent);
}
.header-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 28px;
  height: var(--header-h);
  display: flex; align-items: center; gap: 22px;
}

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  font-family: var(--f-brand); font-weight: 700; font-size: 18px;
  color: #04101F;
  background: var(--grad);
  box-shadow: 0 8px 22px -8px rgba(34, 227, 255, .8), inset 0 1px 0 rgba(255, 255, 255, .4);
  position: relative;
}
.brand-mark::after {
  content: ''; position: absolute; inset: -4px; border-radius: 15px;
  border: 1px solid rgba(34, 227, 255, .28);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-family: var(--f-display); font-size: 16.5px; font-weight: 700;
  letter-spacing: .04em; color: var(--ink);
}
.brand-text span {
  font-family: var(--f-mono); font-size: 9.6px; letter-spacing: .22em;
  color: var(--ink-4); text-transform: uppercase;
}

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  position: relative;
  font-size: 14.8px; color: var(--ink-2);
  padding: 9px 15px; border-radius: 999px;
  transition: color .22s var(--ease), background .22s var(--ease);
}
.nav a:hover { color: var(--ink); background: rgba(140, 180, 255, .07); }
.nav a.is-active { color: var(--cyan); background: rgba(34, 227, 255, .1); }
.nav a.is-active::after {
  content: ''; position: absolute; left: 15px; right: 15px; bottom: 3px; height: 1.5px;
  background: var(--grad); border-radius: 2px;
}

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

.nav-toggle {
  display: none;
  width: 40px; height: 40px; margin-left: auto;
  align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; color: var(--ink); cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 17px; height: 1.6px; background: currentColor; border-radius: 2px;
  transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.nav-toggle span::before, .nav-toggle span::after { content: ''; position: absolute; }
.nav-toggle span::before { transform: translateY(-5.5px); }
.nav-toggle span::after { transform: translateY(5.5px); }
.nav.is-open ~ .nav-toggle span { background: transparent; }
.nav.is-open ~ .nav-toggle span::before { transform: rotate(45deg); }
.nav.is-open ~ .nav-toggle span::after { transform: rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding: 96px 0 88px;
  overflow: hidden;
  background:
    radial-gradient(900px 520px at 78% 12%, rgba(34, 227, 255, .12), transparent 68%),
    radial-gradient(760px 480px at 18% 78%, rgba(139, 92, 246, .12), transparent 70%);
}
.hero > .container { position: relative; z-index: 2; }
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: .5; pointer-events: none;
}
.hero-glow.a { width: 460px; height: 460px; top: -140px; right: -60px; background: radial-gradient(circle, rgba(34, 227, 255, .35), transparent 70%); }
.hero-glow.b { width: 420px; height: 420px; bottom: -160px; left: -80px; background: radial-gradient(circle, rgba(139, 92, 246, .35), transparent 70%); }
#heroCanvas {
  position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%;
  opacity: .75; pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.06fr .94fr;
  gap: 60px; align-items: center;
}

.claim {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono); font-size: 12px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-2);
  padding: 7px 16px; margin-bottom: 26px;
  border: 1px solid var(--line-2); border-radius: 999px;
  background: rgba(34, 227, 255, .06);
}
.claim i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: var(--glow-cyan); position: relative;
}
.claim i::after {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  border: 1px solid rgba(34, 227, 255, .5);
  animation: pulseRing 2s infinite;
}
@keyframes pulseRing {
  0% { transform: scale(.6); opacity: 1; }
  100% { transform: scale(1.9); opacity: 0; }
}

.hero h1 { margin-bottom: 22px; }
.hero h1 .grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  filter: drop-shadow(0 0 26px rgba(34, 227, 255, .35));
}
.hero .sub {
  color: var(--ink-2); font-size: 16.8px; line-height: 1.9;
  max-width: 620px; margin-bottom: 26px;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 32px; }
.hero-tags span {
  font-family: var(--f-mono); font-size: 11.6px; letter-spacing: .08em;
  padding: 6px 13px; border-radius: 6px;
  color: var(--ink-2);
  border: 1px solid var(--line);
  background: var(--surface);
}
.hero-tags span::before { content: '#'; color: var(--cyan); margin-right: 3px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface);
  overflow: hidden;
  backdrop-filter: blur(10px);
}
.hero-stats > div { padding: 18px 16px; border-right: 1px solid var(--line); }
.hero-stats > div:last-child { border-right: none; }
.hero-stats .num {
  font-family: var(--f-brand); font-weight: 700; font-size: 26px; line-height: 1.1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-stats .label {
  font-size: 12.4px; color: var(--ink-3); margin-top: 5px; letter-spacing: .02em;
}

/* 首屏视觉（身份网络） */
.hero-visual { position: relative; }
.hero-visual svg { width: 100%; height: auto; filter: drop-shadow(0 20px 60px rgba(34, 227, 255, .18)); }
.hero-float {
  position: absolute; left: -12px; bottom: 2px;
  min-width: 244px; padding: 16px 18px;
  display: grid; gap: 7px;
  border: 1px solid var(--line-2); border-radius: 14px;
  background: rgba(7, 11, 22, .9);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-3), 0 0 0 1px rgba(34, 227, 255, .08);
  animation: floatY 6s ease-in-out infinite;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
.hero-float > .k {
  font-family: var(--f-mono); font-size: 10.4px; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase; color: var(--cyan);
}
.hero-float > .v {
  font-family: var(--f-mono); font-size: 12.2px; color: var(--ink);
  word-break: break-all; line-height: 1.5;
}
.hero-float .row {
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  padding-top: 8px; border-top: 1px dashed var(--line);
  font-family: var(--f-mono); font-size: 11.4px;
}
.hero-float .row .k { color: var(--ink-4); letter-spacing: .08em; }
.hero-float .row .v { color: var(--cyan); }
.hero-float .pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: var(--glow-cyan); animation: blink 1.6s infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .28; } }

/* ---------- 内页横幅 ---------- */
.page-banner {
  position: relative; overflow: hidden;
  padding: 78px 0 66px;
  background:
    radial-gradient(760px 380px at 20% 0%, rgba(34, 227, 255, .14), transparent 70%),
    radial-gradient(680px 360px at 85% 20%, rgba(139, 92, 246, .12), transparent 70%);
  border-bottom: 1px solid var(--line);
}
.page-banner .inner { position: relative; z-index: 2; max-width: 820px; }
.page-banner .container { position: relative; z-index: 2; }
.crumbs {
  font-family: var(--f-mono); font-size: 11.8px; letter-spacing: .1em;
  color: var(--ink-4); margin-bottom: 18px; text-transform: uppercase;
}
.crumbs a { color: var(--cyan); }
.crumbs a:hover { text-decoration: underline; }
.page-banner h1 { margin-bottom: 14px; }
.page-banner .lead { color: var(--ink-2); font-size: 16.4px; }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(140, 180, 255, .055), rgba(140, 180, 255, .015));
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 227, 255, .0), transparent);
  transition: background .35s var(--ease);
}
/* 鼠标跟随高光（--mx / --my 由 site.js 注入） */
.card > *:not(.icon-box), .card-dark > *:not(.icon-box), .app-card > * { position: relative; z-index: 1; }
.card::after, .card-dark::after, .app-card::after {
  content: ''; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0; transition: opacity .35s var(--ease);
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 50%),
              rgba(34, 227, 255, .14), transparent 65%);
}
.card:hover::after, .card-dark:hover::after, .app-card:hover::after { opacity: 1; }
.app-card > * { z-index: 1; }

.card:hover {
  transform: translateY(-6px);
  border-color: var(--line-2);
  box-shadow: var(--shadow-3), 0 0 0 1px rgba(34, 227, 255, .1);
}
.card:hover::before { background: linear-gradient(90deg, transparent, var(--cyan), transparent); }
.card h3 { margin-bottom: 10px; }

/* 主打卡片 */
.card.feature {
  border-color: rgba(34, 227, 255, .34);
  background: linear-gradient(165deg, rgba(34, 227, 255, .12), rgba(139, 92, 246, .06));
  box-shadow: 0 24px 64px -34px rgba(34, 227, 255, .7);
}
.card.feature::after { opacity: .5; }
.card.feature h3 { color: #fff; }
.card > p { color: var(--ink-2); font-size: 15px; }
.card ul { margin-top: 16px; display: grid; gap: 9px; }
.card ul li {
  position: relative; padding-left: 22px;
  font-size: 14.4px; color: var(--ink-2);
}
.card ul li::before {
  content: ''; position: absolute; left: 0; top: 8px;
  width: 11px; height: 6px;
  border-left: 1.8px solid var(--cyan); border-bottom: 1.8px solid var(--cyan);
  transform: rotate(-45deg);
}

.card-dark {
  position: relative;
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(12, 20, 36, .95), rgba(7, 11, 22, .95));
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.card-dark::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.card-dark:hover { transform: translateY(-6px); border-color: var(--line-2); box-shadow: var(--shadow-3); }
.card-dark:hover::before { transform: scaleX(1); }
.card-dark .idx {
  font-family: var(--f-mono); font-size: 12px; font-weight: 700;
  letter-spacing: .16em; color: var(--ink-4); margin-bottom: 14px;
}
.card-dark h4 { margin: 14px 0 8px; }
.card-dark p { color: var(--ink-3); font-size: 14.4px; margin: 0; }

/* 图标盒 */
.icon-box {
  width: 50px; height: 50px; border-radius: 13px;
  display: grid; place-items: center;
  color: var(--cyan);
  border: 1px solid var(--line-2);
  background: radial-gradient(circle at 30% 25%, rgba(34, 227, 255, .22), rgba(34, 227, 255, .05));
  box-shadow: inset 0 0 18px rgba(34, 227, 255, .12);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), color .35s var(--ease);
}
.card:hover .icon-box, .card-dark:hover .icon-box {
  transform: translateY(-3px) scale(1.05);
  box-shadow: inset 0 0 22px rgba(34, 227, 255, .3), 0 8px 22px -10px rgba(34, 227, 255, .7);
}

/* Bento 网格（首格跨 2×2） */
.bento {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  grid-auto-rows: minmax(168px, auto);
}
.bento > .card:first-child {
  grid-column: span 2; grid-row: span 2;
  display: flex; flex-direction: column; justify-content: center;
  padding: 40px 38px;
}
.bento > .card:first-child .icon-box { width: 58px; height: 58px; margin-bottom: 18px; }
.bento > .card:first-child h3 { font-size: 22px; }
.bento-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.bento-tags span {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .06em;
  padding: 5px 11px; border-radius: 5px;
  color: var(--cyan); border: 1px solid rgba(34, 227, 255, .3);
  background: rgba(34, 227, 255, .07);
}

/* 网格 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ---------- 数据条 ---------- */
.stat-band {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(34, 227, 255, .06), rgba(139, 92, 246, .05));
  overflow: hidden;
}
.stat-band .cell { padding: 26px 22px; border-right: 1px solid var(--line); }
.stat-band .cell:last-child { border-right: none; }
.stat-band .num {
  font-family: var(--f-brand); font-weight: 700; font-size: 34px; line-height: 1.05;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.stat-band .label { font-size: 14px; color: var(--ink); margin-top: 8px; font-weight: 500; }
.stat-band .desc { font-size: 12.8px; color: var(--ink-3); margin-top: 4px; }

/* ---------- 产品卡 ---------- */
.product-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.product-card .cover {
  position: relative; aspect-ratio: 16 / 9; overflow: hidden;
  background: #060B16;
}
.product-card .cover svg { width: 100%; height: 100%; }
.product-card .cover::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5, 7, 15, .85));
}
.product-card .badge {
  position: absolute; z-index: 2; top: 14px; left: 14px;
  font-family: var(--f-mono); font-size: 10.6px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 6px;
  color: #04101F; background: var(--grad);
}
.product-card .body { padding: 24px 26px 26px; flex: 1; display: flex; flex-direction: column; }
.product-card h3 { font-size: 18.5px; margin-bottom: 8px; }
.product-card .sum { color: var(--ink-2); font-size: 14.6px; margin-bottom: 14px; }
.product-card .highlights { display: grid; gap: 7px; margin-bottom: 16px; }
.product-card .highlights li {
  position: relative; padding-left: 16px; font-size: 13.6px; color: var(--ink-3);
}
.product-card .highlights li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--cyan);
}
.product-card .tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; }
.tag {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .06em;
  padding: 4px 10px; border-radius: 5px;
  color: var(--ink-2); border: 1px solid var(--line); background: var(--surface);
}
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; }

/* ---------- 架构图 ---------- */
.arch-tree { display: grid; gap: 12px; }
.arch-node {
  display: flex; align-items: center; gap: 18px;
  padding: 22px 26px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(120deg, rgba(140, 180, 255, .06), rgba(140, 180, 255, .02));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.arch-node:hover { border-color: var(--line-2); transform: translateX(4px); }
.arch-node h4 { margin: 0 0 4px; }
.arch-node p { margin: 0; color: var(--ink-3); font-size: 14px; }
.arch-node.root {
  border-color: rgba(34, 227, 255, .4);
  background: linear-gradient(120deg, rgba(34, 227, 255, .12), rgba(139, 92, 246, .07));
  box-shadow: 0 0 0 1px rgba(34, 227, 255, .12), 0 18px 44px -22px rgba(34, 227, 255, .55);
}
.arch-branch {
  height: 26px; margin: 0 auto; width: 2px;
  background: linear-gradient(180deg, rgba(34, 227, 255, .7), rgba(139, 92, 246, .35));
  position: relative;
}
.arch-branch::after {
  content: ''; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  border-left: 5px solid transparent; border-right: 5px solid transparent;
  border-top: 7px solid rgba(139, 92, 246, .7);
}

/* ---------- 流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: flow; }
.flow .row {
  position: relative; padding: 26px 22px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.flow .row:hover { transform: translateY(-5px); border-color: var(--line-2); }
.flow .row::before {
  counter-increment: flow; content: counter(flow, decimal-leading-zero);
  display: block; font-family: var(--f-mono); font-size: 12px; font-weight: 700;
  letter-spacing: .18em; color: var(--cyan); margin-bottom: 12px;
}
.flow .row h4 { margin-bottom: 6px; }
.flow .row p { margin: 0; color: var(--ink-3); font-size: 14px; }

/* ---------- 时间线 ---------- */
.timeline { display: grid; gap: 16px; }
.tl-item {
  position: relative;
  padding: 24px 26px 24px 30px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(120deg, rgba(140, 180, 255, .05), rgba(140, 180, 255, .015));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.tl-item::before {
  content: ''; position: absolute; left: 0; top: 22px; bottom: 22px; width: 2px;
  background: var(--grad); border-radius: 2px;
}
.tl-item:hover { border-color: var(--line-2); transform: translateX(4px); }
.tl-item .yr {
  font-family: var(--f-mono); font-size: 11px; font-weight: 700;
  letter-spacing: .2em; color: var(--cyan); margin-bottom: 8px; text-transform: uppercase;
}
.tl-item h4 { margin: 0 0 6px; }
.tl-item p { margin: 0; color: var(--ink-2); font-size: 14.6px; }

/* ---------- 筛选条 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.filter-btn {
  font-family: var(--f-display); font-size: 14px; font-weight: 600;
  padding: 9px 20px; border-radius: 999px; cursor: pointer;
  color: var(--ink-2); background: var(--surface);
  border: 1px solid var(--line);
  transition: all .25s var(--ease);
}
.filter-btn:hover { color: var(--ink); border-color: var(--line-2); }
.filter-btn.is-active {
  color: #04101F; background: var(--grad); border-color: transparent;
  box-shadow: 0 8px 24px -10px rgba(34, 227, 255, .7);
}

/* ---------- 下载 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.app-card {
  position: relative; display: flex; gap: 20px; align-items: flex-start;
  padding: 26px;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(34, 227, 255, .07), rgba(139, 92, 246, .04));
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.app-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.app-card:hover { transform: translateY(-5px); border-color: var(--line-2); box-shadow: var(--shadow-3); }
.app-card:hover::before { transform: scaleX(1); }
.app-card h3 { font-size: 18px; margin-bottom: 8px; }
.app-card .desc { color: var(--ink-2); font-size: 14.4px; margin-bottom: 14px; }
.app-card .meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.app-card .meta span {
  font-family: var(--f-mono); font-size: 11.4px; letter-spacing: .05em;
  padding: 4px 10px; border-radius: 5px;
  color: var(--ink-2); border: 1px solid var(--line); background: rgba(5, 7, 15, .5);
}

.file-icon {
  width: 58px; height: 58px; flex-shrink: 0; border-radius: 13px;
  display: grid; place-items: center;
  font-family: var(--f-mono); font-size: 12.5px; font-weight: 700; letter-spacing: .02em;
  color: var(--cyan);
  border: 1px solid var(--line-2);
  background: radial-gradient(circle at 30% 25%, rgba(34, 227, 255, .2), rgba(34, 227, 255, .04));
}

.download-item {
  display: flex; align-items: center; gap: 20px;
  padding: 22px 24px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(120deg, rgba(140, 180, 255, .05), rgba(140, 180, 255, .015));
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.download-item:hover { transform: translateX(5px); border-color: var(--line-2); }
.download-main { flex: 1; min-width: 0; }
.download-main h3 { font-size: 16.5px; margin-bottom: 6px; }
.download-main > p { color: var(--ink-3); font-size: 14px; margin-bottom: 10px; }
.download-meta { display: flex; flex-wrap: wrap; gap: 16px; }
.download-meta span {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--f-mono); font-size: 11.6px; color: var(--ink-3); letter-spacing: .04em;
}
.download-meta svg { color: var(--cyan); }
.download-action { flex-shrink: 0; }

/* ---------- 表单 ---------- */
.form-card {
  padding: 34px 32px;
  border: 1px solid var(--line); border-radius: var(--r-xl);
  background: linear-gradient(165deg, rgba(140, 180, 255, .06), rgba(140, 180, 255, .015));
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-2);
}
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label {
  display: block; margin-bottom: 8px;
  font-size: 13.4px; font-weight: 500; color: var(--ink-2); letter-spacing: .02em;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 15px;
  font-family: var(--f-body); font-size: 14.6px; color: var(--ink);
  background: rgba(5, 7, 15, .6);
  border: 1px solid var(--line); border-radius: 10px;
  outline: none;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease);
}
.field textarea { min-height: 120px; resize: vertical; line-height: 1.7; }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-4); }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: rgba(34, 227, 255, .55);
  background: rgba(5, 7, 15, .85);
  box-shadow: 0 0 0 3px rgba(34, 227, 255, .12);
}
.field select { appearance: none; cursor: pointer; }
.field select option { background: #0A1020; }

.form-note { font-size: 12.8px; color: var(--ink-4); margin-top: 14px; }

.input-group { display: flex; gap: 10px; }
.input-group input { flex: 1; }

/* ---------- 联系区 ---------- */
.contact-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 40px; align-items: start; }
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-item:last-child { border-bottom: none; }
.contact-item h4 { margin: 0 0 4px; font-size: 15.5px; }
.contact-item p { margin: 0; color: var(--ink-2); font-size: 14.4px; }

/* ---------- 登录 / 用户中心 ---------- */
.auth-wrap { display: grid; grid-template-columns: 1fr 1fr; min-height: calc(100vh - var(--header-h)); }
.auth-side {
  position: relative; overflow: hidden;
  padding: 64px 56px;
  display: flex; flex-direction: column; justify-content: center;
  background:
    radial-gradient(700px 420px at 20% 20%, rgba(34, 227, 255, .16), transparent 70%),
    radial-gradient(620px 420px at 85% 80%, rgba(139, 92, 246, .16), transparent 70%),
    linear-gradient(160deg, #070C18, #05070F);
  border-right: 1px solid var(--line);
}
.auth-side h2 { font-size: 30px; margin-bottom: 12px; }
.auth-side > p { color: var(--ink-2); margin-bottom: 26px; }
.auth-side ul { display: grid; gap: 14px; }
.auth-side ul li {
  display: flex; align-items: center; gap: 12px;
  font-size: 14.6px; color: var(--ink-2);
}
.auth-side ul li svg { color: var(--cyan); flex-shrink: 0; }

.auth-panel { display: flex; align-items: center; justify-content: center; padding: 56px 32px; }
.auth-card { width: 100%; max-width: 420px; }
.auth-card h2 { font-size: 26px; margin-bottom: 8px; }
.auth-card .lead { color: var(--ink-3); font-size: 14.4px; margin-bottom: 24px; }

.tabs {
  display: flex; gap: 6px; padding: 5px; margin-bottom: 26px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
}
.tab {
  flex: 1; text-align: center; cursor: pointer;
  padding: 9px 12px; border-radius: 999px;
  font-family: var(--f-display); font-size: 14px; font-weight: 600;
  color: var(--ink-3); border: none; background: none;
  transition: all .25s var(--ease);
}
.tab:hover { color: var(--ink); }
.tab.is-active {
  color: #04101F; background: var(--grad);
  box-shadow: 0 6px 20px -8px rgba(34, 227, 255, .7);
}
.auth-form { display: none; }
.auth-form.is-active { display: block; }
.auth-foot { margin-top: 18px; font-size: 13px; color: var(--ink-4); text-align: center; }

/* 用户中心 */
.member-layout { display: grid; grid-template-columns: 232px 1fr; gap: 28px; align-items: start; }
.member-nav {
  position: sticky; top: calc(var(--header-h) + 20px);
  padding: 14px;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(140, 180, 255, .06), rgba(140, 180, 255, .015));
  display: grid; gap: 4px;
}
.member-nav a {
  padding: 11px 14px; border-radius: 10px;
  font-size: 14.4px; color: var(--ink-2);
  transition: all .22s var(--ease);
}
.member-nav a:hover { color: var(--ink); background: rgba(140, 180, 255, .07); }
.member-nav a.is-active {
  color: var(--cyan); background: rgba(34, 227, 255, .1);
  box-shadow: inset 0 0 0 1px rgba(34, 227, 255, .2);
}
.member-panel { display: none; }
.member-panel.is-active { display: block; }
.panel-head { margin-bottom: 24px; }
.panel-head h2 { font-size: 24px; margin-bottom: 6px; }
.panel-head p { color: var(--ink-3); font-size: 14.4px; margin: 0; }

.record-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 18px; margin-bottom: 12px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.record-item:hover { border-color: var(--line-2); transform: translateX(4px); }
.record-main { flex: 1; min-width: 0; }
.record-main h4 { margin: 0 0 4px; font-size: 15px; }
.record-main p { margin: 0; font-size: 13.4px; color: var(--ink-3); }
.record-time { font-family: var(--f-mono); font-size: 11.6px; color: var(--ink-4); flex-shrink: 0; }

.upload-zone {
  padding: 34px; text-align: center;
  border: 1.5px dashed var(--line-2); border-radius: var(--r-lg);
  background: rgba(34, 227, 255, .04);
  color: var(--ink-2); font-size: 14.4px;
  transition: background .25s var(--ease), border-color .25s var(--ease);
  cursor: pointer;
}
.upload-zone:hover { background: rgba(34, 227, 255, .09); border-color: var(--cyan); }

.notice {
  padding: 14px 18px; border-radius: var(--r);
  border: 1px solid var(--line-2);
  background: rgba(34, 227, 255, .07);
  color: var(--ink-2); font-size: 14.2px;
}
.accent { color: var(--cyan); }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden;
  padding: 96px 0;
  background:
    radial-gradient(760px 420px at 50% 0%, rgba(34, 227, 255, .16), transparent 70%),
    radial-gradient(680px 400px at 80% 100%, rgba(139, 92, 246, .16), transparent 70%),
    linear-gradient(180deg, #070C18, #05070F);
  border-top: 1px solid var(--line);
}
.cta::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(34, 227, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 227, 255, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(70% 100% at 50% 50%, #000, transparent 76%);
  -webkit-mask-image: radial-gradient(70% 100% at 50% 50%, #000, transparent 76%);
}
.cta-inner { position: relative; text-align: center; max-width: 780px; margin: 0 auto; }
.cta h2 { font-size: clamp(26px, 3.2vw, 38px); margin-bottom: 16px; }
.cta p { color: var(--ink-2); font-size: 16.6px; margin-bottom: 32px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta-contact {
  display: flex; gap: 12px 28px; justify-content: center; flex-wrap: wrap;
  margin-top: 30px; padding-top: 24px;
  border-top: 1px solid var(--line);
}
.cta-contact span {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14.4px; color: var(--ink-2);
}
.cta-contact svg { color: var(--cyan); flex-shrink: 0; }
.cta-contact a { color: var(--ink); font-weight: 600; }
.cta-contact a:hover { color: var(--cyan); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  padding: 68px 0 28px;
  background: linear-gradient(180deg, #05070F, #070B16);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: ''; position: absolute; top: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--violet), transparent);
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-desc { color: var(--ink-3); font-size: 14px; max-width: 320px; line-height: 1.8; }
.footer-grid h4 {
  font-family: var(--f-mono); font-size: 11.6px; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink); margin-bottom: 18px;
}
.footer-grid ul { display: grid; gap: 10px; }
.footer-grid ul li a { font-size: 14px; color: var(--ink-3); }
.footer-grid ul li a:hover { color: var(--cyan); }
.footer-contact p {
  display: flex; gap: 10px; align-items: flex-start;
  margin-bottom: 12px; font-size: 14px; color: var(--ink-3);
}
.footer-contact svg { flex-shrink: 0; margin-top: 4px; color: var(--cyan); }
.footer-contact a { color: var(--ink-2); }
.footer-contact a:hover { color: var(--cyan); }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  padding-top: 24px; border-top: 1px solid var(--line);
  font-family: var(--f-mono); font-size: 11.8px; letter-spacing: .05em; color: var(--ink-4);
}

/* ---------- 加载骨架 ---------- */
.skeleton { display: grid; gap: 16px; }
.skeleton-card {
  height: 120px; border-radius: var(--r);
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(140, 180, 255, .05) 30%, rgba(140, 180, 255, .12) 50%, rgba(140, 180, 255, .05) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.4s infinite linear;
}
@keyframes shimmer { 0% { background-position: 120% 0; } 100% { background-position: -120% 0; } }

.empty-state {
  padding: 40px; text-align: center;
  border: 1px dashed var(--line); border-radius: var(--r);
  color: var(--ink-4); font-size: 14.4px;
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal[data-delay="1"] { transition-delay: .07s; }
.reveal[data-delay="2"] { transition-delay: .14s; }
.reveal[data-delay="3"] { transition-delay: .21s; }
.reveal[data-delay="4"] { transition-delay: .28s; }
.reveal[data-delay="5"] { transition-delay: .35s; }

/* ---------- Toast ---------- */
.toast-host {
  position: fixed; z-index: 200; right: 22px; bottom: 22px;
  display: grid; gap: 10px; justify-items: end;
}
.toast {
  padding: 13px 20px; border-radius: 12px;
  font-size: 14.2px; color: var(--ink);
  border: 1px solid var(--line-2);
  background: rgba(10, 16, 32, .95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-2);
  animation: toastIn .3s var(--ease);
}
.toast.success { border-color: rgba(34, 227, 255, .5); box-shadow: 0 12px 34px -14px rgba(34, 227, 255, .6); }
.toast.error { border-color: rgba(255, 90, 110, .5); }
@keyframes toastIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stat-band { grid-template-columns: repeat(2, 1fr); }
  .stat-band .cell:nth-child(2) { border-right: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .member-layout { grid-template-columns: 1fr; }
  .member-nav { position: static; grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento > .card:first-child { grid-column: span 2; grid-row: span 1; padding: 32px 28px; }
}

@media (max-width: 900px) {
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 12px 20px 18px;
    background: rgba(6, 9, 18, .97);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 14px; border-radius: 10px; }
  .nav a.is-active::after { display: none; }
  .nav-toggle { display: flex; }
  .header-actions { margin-left: 0; }
  .header-actions .btn-text { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr; }
  .bento > .card:first-child { grid-column: span 1; }
  .app-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-side { display: none; }
  .auth-panel { padding: 40px 20px; }
  .field-row { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .grid-4, .stat-band, .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats > div:nth-child(2n) { border-right: none; }
  .stat-band .cell { border-right: none; border-bottom: 1px solid var(--line); }
  .download-item { flex-wrap: wrap; }
  .download-action { width: 100%; }
  .download-action .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn { padding: 12px 20px; font-size: 14.4px; }
  .hero-float {
    position: static; margin: 18px auto 0; max-width: 320px; animation: none;
  }
  .hero-visual { padding-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   四域名站群架构增补（v2.0 架构方案）
   ========================================================= */

/* ---------- 导航下拉「更多」 ---------- */
.nav-menu { position: relative; }
.nav-menu-btn {
  display: flex; align-items: center; gap: 5px;
  font-family: var(--f-display); font-size: 14.8px; color: var(--ink-2);
  padding: 9px 15px; border-radius: 999px; border: none; background: none;
  cursor: pointer; transition: color .22s var(--ease), background .22s var(--ease);
}
.nav-menu-btn:hover { color: var(--ink); background: rgba(140, 180, 255, .07); }
.nav-menu-btn .caret { transition: transform .25s var(--ease); }
.nav-menu.is-open .nav-menu-btn,
.nav-menu:hover .nav-menu-btn { color: var(--cyan); background: rgba(34, 227, 255, .1); }
.nav-menu.is-open .nav-menu-btn .caret { transform: rotate(180deg); }

.nav-drop {
  position: absolute; top: calc(100% + 10px); right: 0; min-width: 178px;
  display: grid; gap: 2px; padding: 8px;
  background: rgba(8, 12, 22, .96);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line-2); border-radius: 14px;
  box-shadow: 0 24px 50px -18px rgba(0, 0, 0, .9), 0 0 0 1px rgba(34, 227, 255, .08);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  z-index: 20;
}
.nav-menu:hover .nav-drop, .nav-menu.is-open .nav-drop {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-drop a {
  display: block; padding: 10px 13px; border-radius: 9px;
  font-size: 14px; color: var(--ink-3); white-space: nowrap;
}
.nav-drop a:hover { color: var(--cyan); background: rgba(34, 227, 255, .09); }
.nav-drop a.is-active { color: var(--cyan); background: rgba(34, 227, 255, .1); }
.nav-drop a.is-active::after { display: none; }
.nav-drop .drop-sep { height: 1px; margin: 6px 6px; background: var(--line); }

/* ---------- 页脚：集团站点群 ---------- */
.footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr; }
.footer-sites ul li a {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  font-family: var(--f-mono); font-size: 12.6px; letter-spacing: .02em;
}
.footer-sites .dot {
  width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0;
  background: var(--ink-4); transition: background .2s var(--ease), box-shadow .2s var(--ease);
}
.footer-sites ul li a:hover .dot { background: var(--cyan); box-shadow: var(--glow-cyan); }
.footer-sites .is-current { color: var(--cyan) !important; }
.footer-sites .is-current .dot { background: var(--cyan); box-shadow: var(--glow-cyan); }
.footer-sites .ext { font-size: 10px; color: var(--ink-4); }
.footer-back {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 18px;
  padding: 9px 15px; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(140, 180, 255, .05);
  font-family: var(--f-mono); font-size: 12px; color: var(--ink-2);
  transition: color .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}
.footer-back:hover {
  color: var(--cyan); border-color: rgba(34, 227, 255, .45); background: rgba(34, 227, 255, .08);
}

/* ---------- 页脚合规行 ---------- */
.footer-legal { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-legal a { color: var(--ink-3); }
.footer-legal a:hover { color: var(--cyan); }
.footer-legal i { width: 1px; height: 10px; background: var(--line-2); display: inline-block; }

/* ---------- 栏目页：方向概览条 ---------- */
.domain-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--line); overflow: hidden;
}
.domain-strip .cell {
  padding: 22px 20px; background: var(--surface-2);
  transition: background .25s var(--ease);
}
.domain-strip .cell:hover { background: var(--surface-3); }
.domain-strip .k {
  font-family: var(--f-mono); font-size: 10.6px; letter-spacing: .2em;
  color: var(--ink-4); text-transform: uppercase; display: block; margin-bottom: 8px;
}
.domain-strip .v {
  font-family: var(--f-mono); font-size: 22px; font-weight: 700;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.domain-strip .n { display: block; margin-top: 6px; font-size: 13.4px; color: var(--ink-3); }

/* ---------- 栏目页：能力清单 ---------- */
.cap-list { display: grid; gap: 14px; }
.cap-row {
  display: grid; grid-template-columns: 40px 1fr; gap: 16px; align-items: start;
  padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface); transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.cap-row:hover { border-color: var(--line-2); transform: translateX(5px); }
.cap-row .idx {
  font-family: var(--f-mono); font-size: 12px; color: var(--cyan);
  letter-spacing: .1em; padding-top: 3px;
}
.cap-row h4 { margin: 0 0 6px; font-size: 16px; }
.cap-row p { margin: 0; font-size: 14.4px; color: var(--ink-3); }

/* ---------- 新闻列表 ---------- */
.news-list { display: grid; gap: 16px; }
.news-card { color: inherit; text-decoration: none; cursor: pointer; }
.news-card h3 { transition: color .22s var(--ease); }
.news-card:hover h3 { color: var(--cyan); }
.news-card .go-read {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 14px;
  font-size: 13px; color: var(--cyan);
}
.news-card {
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
  padding: 26px 28px; border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface); position: relative; overflow: hidden;
  transition: border-color .28s var(--ease), transform .28s var(--ease), box-shadow .28s var(--ease);
}
.news-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--grad); opacity: 0; transition: opacity .28s var(--ease);
}
.news-card:hover { transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow-2); }
.news-card:hover::before { opacity: 1; }
.news-card .ncat {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--f-mono); font-size: 10.8px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 10px;
}
.news-card .ncat i { width: 4px; height: 4px; border-radius: 50%; background: var(--cyan); box-shadow: var(--glow-cyan); }
.news-card h3 { margin: 0 0 8px; font-size: 18px; }
.news-card p { margin: 0; font-size: 14.6px; color: var(--ink-3); line-height: 1.8; }
.news-card .nmeta {
  font-family: var(--f-mono); font-size: 11.6px; color: var(--ink-4);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.news-card .top-badge {
  padding: 3px 9px; border-radius: 999px; font-size: 10px; letter-spacing: .12em;
  color: #04101F; background: var(--grad); font-weight: 700;
}
.news-pin { grid-column: 1 / -1; }

/* ---------- 法务正文 ---------- */
.legal-body { max-width: 820px; }
.legal-body h3 {
  font-size: 18px; margin: 34px 0 12px; padding-left: 14px; position: relative;
}
.legal-body h3::before {
  content: ''; position: absolute; left: 0; top: 5px; bottom: 5px; width: 3px;
  border-radius: 2px; background: var(--grad);
}
.legal-body p, .legal-body li { font-size: 15px; color: var(--ink-2); line-height: 1.95; }
.legal-body ul { display: grid; gap: 8px; padding-left: 20px; }
.legal-body ul li { list-style: disc; }
.legal-meta {
  font-family: var(--f-mono); font-size: 12px; color: var(--ink-4);
  padding: 14px 18px; border: 1px dashed var(--line); border-radius: 12px; margin-bottom: 8px;
}

@media (max-width: 1180px) {
  .nav a, .nav-menu-btn { padding: 9px 11px; font-size: 14px; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-sites ul { grid-template-columns: 1fr; }
  .domain-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-menu { flex-direction: column; align-items: stretch; }
  .nav-menu-btn { justify-content: space-between; width: 100%; padding: 12px 14px; border-radius: 10px; }
  .nav-drop {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; background: rgba(140, 180, 255, .04);
    border-color: var(--line); min-width: 0; margin: 2px 0 6px; padding: 6px;
  }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-sites ul { grid-template-columns: 1fr; }
  .news-card { grid-template-columns: 1fr; }
  .cap-row { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 640px) {
  .domain-strip { grid-template-columns: 1fr; }
  .news-card { padding: 22px 20px; }
}

/* ---------- 首页业务方向入口 ---------- */
.dir-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.dir-card {
  display: block; padding: 26px 22px; position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--r); background: var(--surface);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.dir-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), rgba(34, 227, 255, .14), transparent 62%);
  opacity: 0; transition: opacity .3s var(--ease); pointer-events: none;
}
.dir-card:hover { transform: translateY(-5px); border-color: rgba(34, 227, 255, .4); box-shadow: var(--shadow-2); }
.dir-card:hover::before { opacity: 1; }
.dir-card .dn {
  font-family: var(--f-mono); font-size: 10.4px; letter-spacing: .2em;
  color: var(--ink-4); text-transform: uppercase;
}
.dir-card h3 { margin: 12px 0 8px; font-size: 17px; }
.dir-card p { margin: 0; font-size: 13.8px; color: var(--ink-3); line-height: 1.75; }
.dir-card .go {
  margin-top: 16px; display: flex; align-items: center; gap: 6px;
  font-family: var(--f-mono); font-size: 11.6px; color: var(--cyan); letter-spacing: .06em;
}
.dir-card .go svg { transition: transform .25s var(--ease); }
.dir-card:hover .go svg { transform: translateX(4px); }

@media (max-width: 1180px) { .dir-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px) { .dir-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .dir-grid { grid-template-columns: 1fr; } }

/* ---------- 站群增补 ---------- */
.news-list.is-compact .news-card:nth-child(n+4) { display: none; }
.legal-body a { color: var(--cyan); }
.legal-body a:hover { text-decoration: underline; }
.cap-row p a { color: var(--cyan); white-space: nowrap; }
.cap-row p a:hover { text-decoration: underline; }
.notice a { color: var(--cyan); }
@media (max-width: 900px) { .news-list.is-compact .news-card:nth-child(n+4) { display: block; } }

/* ---------- 语言切换 ---------- */
.lang-switch{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border:1px solid var(--line);border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--ink-3);text-decoration:none;transition:.2s;white-space:nowrap}
.lang-switch:hover{color:var(--cyan);border-color:rgba(34,227,255,.45);box-shadow:0 0 0 3px rgba(34,227,255,.08)}
@media(max-width:960px){.lang-switch{display:none}}

/* ---------- 新闻详情页 ---------- */

/* ---------- 新闻详情 ---------- */
.article{max-width:760px;margin:0 auto}
.article-head{margin-bottom:34px}
.article-head .ncat{margin-bottom:14px}
.article-head h1{font-size:30px;line-height:1.45;margin:0 0 14px}
.article-meta{display:flex;gap:14px;align-items:center;color:var(--ink-3);font-size:13.5px}
.article-meta i{width:4px;height:4px;border-radius:50%;background:var(--ink-3);opacity:.6}
.article-body{font-size:16px;line-height:2.05;color:var(--ink-2)}
.article-body p{margin:0 0 22px}
.article-body .lead-p{font-size:17.5px;color:var(--ink-1)}
.article-foot{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.article-nav a{display:inline-flex;align-items:center;gap:8px;color:var(--ink-3);font-size:14px;text-decoration:none}
.article-nav a:hover{color:var(--cyan)}
.more-news{margin-top:60px;padding-top:34px;border-top:1px solid var(--line)}
.more-news h3{font-size:15px;letter-spacing:.08em;color:var(--ink-3);margin:0 0 18px;text-transform:uppercase}
.more-news ul{list-style:none;margin:0;padding:0}
.more-news li{margin:0 0 10px}
.more-news a{display:flex;gap:12px;align-items:baseline;color:var(--ink-2);text-decoration:none;font-size:14.5px;padding:9px 12px;border-radius:10px;transition:.2s}
.more-news a:hover{background:rgba(34,227,255,.06);color:var(--cyan)}
.more-news .d{flex:none;font-size:12.5px;color:var(--ink-3);font-family:'JetBrains Mono',monospace}

/* ===== v4 · 排版与字体增强 =====

:root {
  /* 阅读节奏 */
  --lh-body: 1.82;
  --lh-head: 1.30;
  --ls-cjk: .012em;      /* 中文正文：微正字距，避免暗底糊在一起 */
  --ls-head: -.005em;    /* 标题：轻微收紧即可，中文不再用 -.02em */
  --measure: 36em;       /* 舒适行宽 ≈ 36 个汉字 */
  --measure-wide: 46em;

  /* 对比度（WCAG AA）：正文次级色提亮 */
  --ink-2: #B4C5E0;
  --ink-3: #8A9CBB;
}

/* ---------- 1. 基础排版 ---------- */
body {
  font-size: 16px;
  line-height: var(--lh-body);
  letter-spacing: var(--ls-cjk);
  font-synthesis-weight: none;
  text-rendering: optimizeSpeed;
}

h1, h2, h3, h4, h5 {
  line-height: var(--lh-head);
  letter-spacing: var(--ls-head);
  text-wrap: balance;
}
h1 { line-height: 1.18; }
h2 { line-height: 1.26; }
h3 { font-size: clamp(18px, 1.5vw, 20.5px); }
h4 { font-size: clamp(15.5px, 1.15vw, 17px); }
p  { text-wrap: pretty; }

/* 中文与西文混排：西文段落用更紧凑的字距 */
:lang(en), .mono, code, kbd, samp { letter-spacing: .002em; }

/* 数字对齐：统计数字、参数表不再左右跳动 */
.stat-band .num,
.stat .num,
.hero-stats .num,
.kpi .num,
table td,
.legal-body,
[data-num] { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }

/* ---------- 2. 阅读行宽 ---------- */
.section-head .lead,
.section-head > p,
.page-banner .lead,
.page-banner p,
.hero .sub,
.prose > p,
.prose > ul,
.prose > ol { max-width: var(--measure); }

.lead {
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 3. 段落与列表节奏 ---------- */
.prose > p { margin: 0 0 1.05em; }
.prose > p:last-child { margin-bottom: 0; }
.prose > ul,
.prose > ol {
  margin: 0 0 1.1em;
  padding-left: 1.35em;
  display: grid;
  gap: .55em;
}
.prose > ul { list-style: none; padding-left: .1em; }
.prose > ul > li { position: relative; padding-left: 1.15em; }
.prose > ul > li::before {
  content: '';
  position: absolute; left: 0; top: .62em;
  width: 6px; height: 6px; border-radius: 2px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
}
.prose > ol { list-style: decimal; }
.prose > ol > li::marker { color: var(--cyan); font-weight: 700; }
.prose > h3 { margin-top: 1.6em; }
.prose strong { color: var(--ink); font-weight: 700; }

/* 定义列表式要点：dt 等宽小标签 + dd 说明 */
.fact-list { display: grid; gap: 2px; margin: 0; }
.fact-list > div {
  display: grid;
  grid-template-columns: minmax(96px, 132px) 1fr;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.fact-list > div:last-child { border-bottom: 1px solid var(--line); }
.fact-list dt {
  font-family: var(--f-mono);
  font-size: 11.6px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 2px;
}
.fact-list dd { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.75; }

@media (max-width: 640px) {
  .fact-list > div { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- 4. 标题组节奏 ---------- */
.section-head { margin-bottom: clamp(28px, 3.4vw, 44px); }
.section-head h2 { margin-bottom: 14px; }
.section-head .lead { margin: 0; }
.eyebrow { letter-spacing: .16em; }

/* ---------- 5. 卡片内文本 ---------- */
.card > p,
.card p,
.dir-card p,
.product-card p {
  line-height: 1.75;
  letter-spacing: .012em;
}
.card h3, .dir-card h3, .product-card h3 { text-wrap: balance; }

/* ---------- 6. 链接与强调 ---------- */
.prose a,
.legal-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(34, 227, 255, .35);
  text-underline-offset: 3px;
  transition: text-decoration-color .2s var(--ease);
}
.prose a:hover,
.legal-body a:hover { text-decoration-color: var(--cyan); }

/* ---------- 7. 移动端字号回落 ---------- */
@media (max-width: 480px) {
  body { font-size: 15.5px; line-height: 1.8; }
  h1 { font-size: clamp(28px, 7.6vw, 36px); }
  h2 { font-size: clamp(22px, 5.6vw, 28px); }
  .lead { font-size: 15.5px; }
}

/* ---------- v4 · 内容增强组件 ---------- */
.step {
  display: inline-flex;
  font-family: var(--f-mono);
  font-size: 11.6px; font-weight: 700;
  letter-spacing: .14em;
  color: var(--cyan);
  margin-bottom: 10px;
}
.card > .step + h4 { margin-top: 0; }
#howWeWork .card { padding: 22px 20px; }
#dataCompliance .prose { padding: 24px 22px; }
#dataCompliance .prose h3 { margin-top: 0; }
#dataCompliance .fact-list { align-self: start; }
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .grid-4 { grid-template-columns: 1fr; }
}