/* ============================================================
   建新快看 · 液态玻璃（Liquid Glass）设计系统
   核心指纹：鲜艳渐变底 + 半透明磨砂卡片 + 1px 亮边 + 18px 圆角
   ============================================================ */

:root {
  --bg: #070A1C;
  --bg-2: #0B1030;
  --ink: #F2F5FF;
  --muted: #AAB6DC;
  --pink: #FF2E88;
  --violet: #7C4DFF;
  --cyan: #00E0FF;
  --mint: #38FFC3;

  --glass: rgba(255, 255, 255, .09);
  --glass-hi: rgba(255, 255, 255, .16);
  --glass-lo: rgba(255, 255, 255, .05);
  --border-color: rgba(255, 255, 255, .26);
  --border-soft: rgba(255, 255, 255, .14);

  --radius: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-5: 40px;
  --s-6: 48px;
  --s-8: 64px;
  --s-10: 80px;

  --maxw: 1200px;
  --nav-h: 68px;

  --shadow-glass: 0 18px 50px rgba(3, 6, 24, .55), inset 0 1px 0 rgba(255, 255, 255, .18);
  --shadow-glow: 0 12px 40px rgba(124, 77, 255, .38), 0 0 0 1px rgba(255, 255, 255, .12);

  --grad-brand: linear-gradient(120deg, var(--pink), var(--violet) 45%, var(--cyan));
  --grad-mint: linear-gradient(120deg, var(--cyan), var(--mint));

  --dur: 480ms;
  --ease: cubic-bezier(.22, .68, .28, 1);

  --font: "Outfit", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}

/* ---------- 浅色模式 ---------- */
html[data-theme="light"] {
  --bg: #EEF1FF;
  --bg-2: #F7F4FF;
  --ink: #0B1030;
  --muted: #4A5578;
  --glass: rgba(255, 255, 255, .58);
  --glass-hi: rgba(255, 255, 255, .82);
  --glass-lo: rgba(255, 255, 255, .34);
  --border-color: rgba(11, 16, 48, .16);
  --border-soft: rgba(11, 16, 48, .10);
  --shadow-glass: 0 18px 44px rgba(31, 41, 88, .16), inset 0 1px 0 rgba(255, 255, 255, .8);
  color-scheme: light;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  min-height: 100vh;
}

/* 鲜艳渐变背景层（液态玻璃的“液”） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(48% 42% at 12% 8%, rgba(255, 46, 136, .50), transparent 62%),
    radial-gradient(46% 44% at 88% 6%, rgba(124, 77, 255, .52), transparent 60%),
    radial-gradient(52% 46% at 78% 88%, rgba(0, 224, 255, .40), transparent 62%),
    radial-gradient(44% 40% at 16% 92%, rgba(56, 255, 195, .30), transparent 60%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 55%, var(--bg) 100%);
  filter: saturate(118%);
}

/* 缓慢漂移的光斑（morphing / animated blur） */
body::after {
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(24% 22% at 30% 40%, rgba(255, 255, 255, .16), transparent 70%),
    radial-gradient(18% 16% at 70% 60%, rgba(124, 77, 255, .30), transparent 72%);
  filter: blur(60px) hue-rotate(0deg);
  mix-blend-mode: screen;
  animation: drift 26s var(--ease) infinite alternate;
}

@keyframes drift {
  0%   { transform: translate3d(-3%, -2%, 0) scale(1);    filter: blur(60px) hue-rotate(0deg); }
  50%  { transform: translate3d(4%, 3%, 0) scale(1.12);   filter: blur(78px) hue-rotate(28deg); }
  100% { transform: translate3d(-2%, 6%, 0) scale(1.04);  filter: blur(64px) hue-rotate(-18deg); }
}

img, svg { max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 var(--s-2); }
p:last-child { margin-bottom: 0; }

/* ---------- 排版层级 ---------- */
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 4rem); font-weight: 900; line-height: 1.1; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; }
h3 { font-size: 18px; font-weight: 700; line-height: 1.3; }
h4 { font-size: 16px; font-weight: 700; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--s-2);
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.lead { font-size: 18px; color: var(--muted); max-width: 34em; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.tag-line { font-size: 13px; letter-spacing: .04em; color: var(--muted); }
.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--s-3);
}
main { display: block; }
.section { padding-block: var(--s-10); }
.section--tight { padding-block: var(--s-6); }
.section-head { max-width: 44em; margin-bottom: var(--s-5); }
.section-head p { color: var(--muted); max-width: 34em; margin-top: var(--s-2); }
.grid { display: grid; gap: var(--s-3); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stack { display: flex; flex-direction: column; gap: var(--s-2); }
.row { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }
.divider { height: 1px; border: 0; background: var(--border-soft); margin-block: var(--s-6); }

/* ---------- 玻璃面板 ---------- */
.glass {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: var(--shadow-glass);
  padding: var(--s-3);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
/* 1px 亮边 + 虹彩高光叠层 */
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(255, 255, 255, .55), rgba(255, 255, 255, 0) 38%,
              rgba(0, 224, 255, .28) 72%, rgba(255, 46, 136, .28));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
  opacity: .75;
  transition: opacity var(--dur) var(--ease);
}
.glass--pad-lg { padding: var(--s-5); }
.glass--soft { background: var(--glass-lo); }

a.glass:hover,
.glass--hover:hover {
  transform: translateY(-4px);
  background: var(--glass-hi);
  border-color: rgba(255, 255, 255, .40);
  box-shadow: var(--shadow-glow);
}
a.glass:hover::before,
.glass--hover:hover::before { opacity: 1; }
a.glass:focus-visible,
.glass--hover:focus-within { outline: 2px solid var(--cyan); outline-offset: 3px; }

.card-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(140deg, rgba(255, 46, 136, .28), rgba(124, 77, 255, .28) 50%, rgba(0, 224, 255, .28));
  border: 1px solid var(--border-color);
  margin-bottom: var(--s-2);
}
.card-icon svg { width: 24px; height: 24px; stroke: var(--ink); }
.card-meta { font-size: 13px; color: var(--muted); letter-spacing: .04em; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: var(--s-2);
  font-size: 14px; font-weight: 500; color: var(--cyan);
}
.card-link svg { width: 16px; height: 16px; stroke: currentColor; transition: transform var(--dur) var(--ease); }
a:hover > .card-link svg, .card-link:hover svg { transform: translateX(4px); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(7, 10, 28, .55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-soft);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
html[data-theme="light"] .nav { background: rgba(255, 255, 255, .62); }
.nav.is-stuck { box-shadow: 0 10px 30px rgba(3, 6, 24, .35); }
.nav-inner {
  width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--s-3);
  display: flex; align-items: center; gap: var(--s-3);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: -.02em; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 11px;
  display: grid; place-items: center;
  background: var(--grad-brand);
  box-shadow: 0 6px 20px rgba(124, 77, 255, .5);
}
.brand-mark svg { width: 20px; height: 20px; stroke: #fff; }
.nav-links { display: flex; align-items: center; gap: var(--s-1); margin-left: auto; }
.nav-links a {
  position: relative;
  display: inline-flex; align-items: center;
  min-height: 44px; padding-inline: 14px;
  font-size: 15px; font-weight: 500; color: var(--muted);
  border-radius: var(--radius-pill);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-links a:hover { color: var(--ink); background: var(--glass); }
.nav-links a[aria-current="page"] { color: var(--ink); background: var(--glass-hi); }
.nav-links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 6px; height: 2px;
  border-radius: 2px; background: var(--grad-brand);
}
.nav-actions { display: flex; align-items: center; gap: var(--s-1); }
.nav-only-mobile { display: none !important; }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  background: var(--glass); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); color: var(--ink); cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; stroke: currentColor; }
.icon-btn {
  width: 44px; height: 44px; flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--glass); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); color: var(--ink); cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              transform 220ms var(--ease), border-color var(--dur) var(--ease);
}
.icon-btn svg { width: 20px; height: 20px; stroke: currentColor; }
.icon-btn:hover { background: var(--glass-hi); color: var(--cyan); border-color: var(--cyan); transform: translateY(-2px); }
.icon-btn:active { transform: translateY(1px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 var(--s-3);
  font: inherit; font-size: 15px; font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 220ms var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn svg { width: 18px; height: 18px; stroke: currentColor; }
.btn--primary {
  color: #fff;
  background: linear-gradient(120deg, var(--pink), var(--violet) 55%, var(--cyan));
  box-shadow: 0 10px 30px rgba(124, 77, 255, .45);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(255, 46, 136, .48); filter: brightness(1.08); }
.btn--primary:active { transform: translateY(1px) scale(.99); box-shadow: 0 6px 18px rgba(124, 77, 255, .4); }
.btn--secondary {
  color: var(--ink);
  background: var(--glass-hi);
  border-color: var(--border-color);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
}
.btn--secondary:hover { transform: translateY(-2px); background: var(--glass); border-color: var(--cyan); color: var(--cyan); }
.btn--secondary:active { transform: translateY(1px); }
.btn--ghost { color: var(--muted); background: transparent; border-color: transparent; }
.btn--ghost:hover { color: var(--ink); background: var(--glass-lo); }
.btn--sm { min-height: 36px; padding: 0 var(--s-2); font-size: 14px; border-radius: var(--radius-sm); }
.btn--block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] {
  opacity: .45; cursor: not-allowed; transform: none;
  box-shadow: none; filter: none; pointer-events: none;
}
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

/* ---------- chip / badge ---------- */
.chipbar { display: flex; flex-wrap: wrap; gap: var(--s-1); }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  font-size: 13px; font-weight: 500; letter-spacing: .04em;
  color: var(--ink);
  background: var(--glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.chip:hover { background: var(--glass-hi); transform: translateY(-2px); }
.chip i { width: 6px; height: 6px; border-radius: 50%; background: var(--pink); font-style: normal; }
.chip--cyan i { background: var(--cyan); }
.chip--violet i { background: var(--violet); }
.chip--mint i { background: var(--mint); }

.badge {
  display: inline-flex; align-items: center;
  padding: 4px 10px;
  font-size: 13px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-color);
  background: var(--glass-lo);
  color: var(--muted);
}
.badge--hot { color: #fff; background: linear-gradient(120deg, var(--pink), var(--violet)); border-color: transparent; }
.badge--new { color: #04121A; background: var(--grad-mint); border-color: transparent; font-weight: 700; }
.badge--live { color: var(--mint); border-color: rgba(56, 255, 195, .45); }

/* ---------- Hero ---------- */
.hero { padding-block: var(--s-10) var(--s-8); position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--s-6); align-items: center; }
.hero h1 { margin-bottom: var(--s-3); }
.hero .lead { margin-bottom: var(--s-4); }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-bottom: var(--s-4); }
.hero-note { font-size: 13px; color: var(--muted); }

/* Hero 纯 CSS/SVG 装饰视觉 */
.hero-visual { position: relative; aspect-ratio: 1 / 1; min-height: 340px; }
.orb {
  position: absolute; inset: 6%;
  border-radius: 42% 58% 63% 37% / 47% 42% 58% 53%;
  background: conic-gradient(from 210deg, var(--pink), var(--violet), var(--cyan), var(--mint), var(--pink));
  filter: blur(26px) saturate(140%);
  opacity: .68;
  animation: morph 9s var(--ease) infinite alternate;
}
@keyframes morph {
  0%   { border-radius: 42% 58% 63% 37% / 47% 42% 58% 53%; transform: rotate(0deg) scale(1); }
  50%  { border-radius: 62% 38% 40% 60% / 36% 62% 38% 64%; transform: rotate(18deg) scale(1.06); }
  100% { border-radius: 38% 62% 58% 42% / 62% 38% 62% 38%; transform: rotate(-12deg) scale(.98); }
}
.hero-panel {
  position: absolute; inset: 12% 6% auto auto;
  width: 62%; padding: var(--s-3);
  background: var(--glass-hi);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  box-shadow: var(--shadow-glass);
  animation: float 7s var(--ease) infinite alternate;
}
.hero-panel-2 {
  position: absolute; left: 4%; bottom: 8%;
  width: 52%; padding: var(--s-2);
  background: var(--glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  backdrop-filter: blur(16px) saturate(170%);
  -webkit-backdrop-filter: blur(16px) saturate(170%);
  box-shadow: var(--shadow-glass);
  animation: float 8s var(--ease) infinite alternate-reverse;
}
@keyframes float {
  from { transform: translateY(-8px); }
  to   { transform: translateY(10px); }
}
.spark { width: 100%; height: auto; }
.spark path { stroke-dasharray: 320; stroke-dashoffset: 320; animation: draw 5s var(--ease) infinite; }
@keyframes draw { 0% { stroke-dashoffset: 320; } 55%, 100% { stroke-dashoffset: 0; } }
.meter { height: 6px; border-radius: 3px; background: var(--glass-lo); overflow: hidden; }
.meter span { display: block; height: 100%; border-radius: 3px; background: var(--grad-mint); }
.kv { display: flex; justify-content: space-between; gap: var(--s-2); font-size: 13px; color: var(--muted); }

/* ---------- 统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); }
.stat b { display: block; font-size: clamp(1.75rem, 3.4vw, 2.5rem); font-weight: 800; line-height: 1.1; }
.stat span { font-size: 14px; color: var(--muted); }

/* ---------- 列表条目 ---------- */
.list-check li {
  position: relative; padding-left: 28px; margin-bottom: var(--s-1); color: var(--muted);
}
.list-check li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 14px; height: 14px; border-radius: 5px;
  background: var(--grad-mint);
  box-shadow: 0 0 12px rgba(56, 255, 195, .55);
}
.spec { width: 100%; border-collapse: collapse; font-size: 15px; }
.spec th, .spec td { text-align: left; padding: 12px 0; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
.spec th { width: 38%; color: var(--muted); font-weight: 500; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: var(--s-4); }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--pink), var(--violet), var(--cyan));
  border-radius: 2px;
}
.timeline li { position: relative; padding-bottom: var(--s-4); }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: calc(-1 * var(--s-4) + 2px); top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--ink); box-shadow: 0 0 0 3px rgba(124, 77, 255, .55);
}
.timeline time { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--cyan); }

/* ---------- 成员 ---------- */
.avatar {
  width: 88px; height: 88px; border-radius: var(--radius);
  display: grid; place-items: center;
  font-size: 30px; font-weight: 800; color: #fff;
  background: linear-gradient(140deg, var(--violet), var(--pink));
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 26px rgba(124, 77, 255, .4);
}
.avatar--lg { width: 112px; height: 112px; font-size: 38px; border-radius: var(--radius); }
.avatar.a2 { background: linear-gradient(140deg, var(--cyan), var(--violet)); }
.avatar.a3 { background: linear-gradient(140deg, var(--mint), var(--cyan)); color: #04121A; }
.avatar.a4 { background: linear-gradient(140deg, var(--pink), #FF8A3D); }
.avatar.a5 { background: linear-gradient(140deg, #5B7CFF, var(--violet)); }
.avatar.a6 { background: linear-gradient(140deg, var(--violet), var(--mint)); }

/* ---------- 表单 ---------- */
.form-grid { display: grid; gap: var(--s-3); }
.field { display: grid; gap: 6px; }
.field label { font-size: 14px; font-weight: 500; }
.field .hint { font-size: 13px; color: var(--muted); }
.input, .textarea, .select {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  font: inherit; font-size: 16px;
  color: var(--ink);
  background: var(--glass-lo);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease), background 220ms var(--ease);
}
.textarea { min-height: 132px; resize: vertical; line-height: 1.6; }
.input::placeholder, .textarea::placeholder { color: var(--muted); opacity: .7; }
.input:hover, .textarea:hover { background: var(--glass); }
.input:focus-visible, .textarea:focus-visible, .select:focus-visible {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 224, 255, .28);
  background: var(--glass);
}
.select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
                    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) 22px, calc(100% - 14px) 22px;
  background-size: 6px 6px;
  background-repeat: no-repeat;
}
.form-status { font-size: 14px; min-height: 22px; }
.form-status[data-state="ok"] { color: var(--mint); }
.form-status[data-state="err"] { color: var(--pink); }

/* ---------- 开关 toggle ---------- */
.toggle { display: inline-flex; align-items: center; gap: 12px; cursor: pointer; min-height: 44px; }
.toggle input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.toggle .track {
  position: relative; flex: none;
  width: 52px; height: 30px; border-radius: var(--radius-pill);
  background: var(--glass-lo);
  border: 1px solid var(--border-color);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.toggle .thumb {
  position: absolute; top: 3px; left: 3px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--ink);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.toggle input:checked + .track { background: linear-gradient(120deg, var(--violet), var(--cyan)); border-color: transparent; }
.toggle input:checked + .track .thumb { transform: translateX(22px); background: #fff; }
.toggle input:focus-visible + .track { outline: 2px solid var(--cyan); outline-offset: 3px; }
.toggle .label { font-size: 14px; }

/* ---------- 面包屑 / 页头 ---------- */
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--muted); margin-bottom: var(--s-3); }
.crumbs a:hover { color: var(--cyan); }
.page-head { padding-block: var(--s-8) var(--s-5); }
.page-head h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); font-weight: 800; margin-bottom: var(--s-2); }
.page-head p { color: var(--muted); max-width: 40em; }

/* ---------- CTA 条 ---------- */
.cta-band { display: grid; gap: var(--s-3); align-items: center; }
@media (min-width: 860px) { .cta-band { grid-template-columns: 1.4fr auto; } }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: var(--s-10);
  background: rgba(4, 6, 20, .72);
  border-top: 1px solid var(--border-soft);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}
html[data-theme="light"] .footer { background: rgba(255, 255, 255, .6); }
.footer-grid { display: grid; gap: var(--s-5); padding-block: var(--s-8) var(--s-5); }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1.2fr; } }
.footer h4 { font-size: 13px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: var(--s-2); }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 15px; color: var(--muted); transition: color 220ms var(--ease); }
.footer-links a:hover { color: var(--ink); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: var(--s-2); justify-content: space-between;
  padding-block: var(--s-3);
  border-top: 1px solid var(--border-soft);
  font-size: 13px; color: var(--muted);
}

/* ---------- 进入动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms var(--ease), transform 600ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 460px; margin-inline: auto; width: 100%; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .section { padding-block: var(--s-8); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    margin: 0; padding: var(--s-2) var(--s-3) var(--s-4);
    background: rgba(7, 10, 28, .92);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-soft);
    transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), visibility var(--dur);
  }
  html[data-theme="light"] .nav-links { background: rgba(255, 255, 255, .95); }
  .nav-links.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { min-height: 48px; font-size: 16px; }
  .nav-only-mobile { display: inline-flex !important; }
  .nav-actions .btn--primary { display: none; }
  .hero { padding-top: var(--s-5); }
  .hero-cta .btn { flex: 1 1 100%; }
  .stats { grid-template-columns: 1fr; }
  .container { padding-inline: var(--s-2); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  body::before, body::after { display: none; }
  .nav, .footer { display: none; }
}