/* ==========================================================================
   舞萌（北京）信息科技有限公司 — 门户主样式
   零依赖 / 单文件 / 仅使用 transform & opacity 做动画（GPU 合成层）
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --c-bg: #05070f;
  --c-bg-soft: #080c18;
  --c-bg-elev: #0c1222;
  --c-line: rgba(255, 255, 255, .09);
  --c-line-strong: rgba(255, 255, 255, .16);
  --c-text: #e8ecf6;
  --c-text-mid: #a4aec6;
  --c-text-dim: #6f7a94;

  --c-brand: #22d3ee;
  --c-brand-2: #3b82f6;
  --c-brand-3: #8b5cf6;
  --c-accent: #f472b6;
  --c-ok: #34d399;
  --c-warn: #fbbf24;

  --grad-brand: linear-gradient(100deg, #22d3ee 0%, #3b82f6 45%, #8b5cf6 100%);
  --grad-text: linear-gradient(100deg, #a5f3fc 0%, #93c5fd 40%, #d8b4fe 100%);
  --grad-surface: linear-gradient(160deg, rgba(255, 255, 255, .055), rgba(255, 255, 255, .012));

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-full: 999px;

  --sp: 8px;
  --wrap: 1220px;
  --nav-h: 68px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-md: 0 12px 32px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 40px 80px -32px rgba(0, 0, 0, .8);
  --glow: 0 0 0 1px rgba(34, 211, 238, .28), 0 18px 50px -18px rgba(34, 211, 238, .35);

  /* 顺滑曲线：出场用 out-expo，交互用 out-back 的收敛版 */
  --e-out: cubic-bezier(.22, 1, .36, 1);
  --e-io: cubic-bezier(.65, .05, .36, 1);
  --e-pop: cubic-bezier(.34, 1.4, .64, 1);
  --t-fast: .18s var(--e-out);
  --t-mid: .38s var(--e-out);
  --t-slow: .72s var(--e-out);
}

/* 浅色主题 */
[data-theme="light"] {
  --c-bg: #f6f8fc;
  --c-bg-soft: #ffffff;
  --c-bg-elev: #ffffff;
  --c-line: rgba(11, 22, 46, .1);
  --c-line-strong: rgba(11, 22, 46, .18);
  --c-text: #0b1324;
  --c-text-mid: #4a5670;
  --c-text-dim: #76819a;
  --grad-text: linear-gradient(100deg, #0e7490 0%, #1d4ed8 45%, #6d28d9 100%);
  --grad-surface: linear-gradient(160deg, rgba(11, 22, 46, .035), rgba(11, 22, 46, .008));
  --shadow-md: 0 12px 32px -14px rgba(11, 22, 46, .18);
  --shadow-lg: 0 40px 80px -34px rgba(11, 22, 46, .24);
  --glow: 0 0 0 1px rgba(29, 78, 216, .22), 0 18px 44px -20px rgba(29, 78, 216, .3);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  font-variant-numeric: tabular-nums;
}

img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--c-brand); outline-offset: 3px; border-radius: 4px; }
::selection { background: rgba(59, 130, 246, .35); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--c-line-strong); border-radius: var(--r-full);
  border: 3px solid transparent; background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--c-text-dim); background-clip: content-box; }

/* ---------- 3. 布局原语 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }
.section { padding: clamp(64px, 9vw, 128px) 0; position: relative; }
.section--tight { padding: clamp(48px, 6vw, 80px) 0; }
.section + .section { padding-top: 0; }
.section--sep { border-top: 1px solid var(--c-line); }

/* 视口外不参与渲染计算 —— 长页面滚动性能关键 */
.defer { content-visibility: auto; contain-intrinsic-size: auto 720px; }

.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.flex { display: flex; gap: 12px; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.between { justify-content: space-between; }
.center { justify-content: center; }
.col { flex-direction: column; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; } .mt-5 { margin-top: 48px; }
.txt-c { text-align: center; }
.nowrap { white-space: nowrap; }

/* ---------- 4. 排版 ---------- */
h1, h2, h3, h4 { line-height: 1.22; font-weight: 700; letter-spacing: -.02em; text-wrap: balance; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4.1rem); }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.75rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }
h4 { font-size: 1.02rem; }
p { text-wrap: pretty; }

.lead { font-size: clamp(1rem, 1.35vw, 1.18rem); color: var(--c-text-mid); max-width: 62ch; }
.muted { color: var(--c-text-mid); }
.dim { color: var(--c-text-dim); }
.small { font-size: .875rem; }
.xs { font-size: .78rem; }
.mono {
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: .875em;
}
.gt {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
  color: var(--c-brand);
  padding: 6px 14px; border-radius: var(--r-full);
  border: 1px solid rgba(34, 211, 238, .25);
  background: rgba(34, 211, 238, .07);
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-brand); box-shadow: 0 0 8px var(--c-brand);
  animation: pulse 2.4s var(--e-io) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.7); } }

.sec-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 60px); }
.sec-head.txt-c { margin-inline: auto; }
.sec-head h2 { margin: 18px 0 14px; }

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 22px; border-radius: var(--r-full);
  font-weight: 600; font-size: .94rem; white-space: nowrap;
  background: var(--btn-bg);
  transition: transform var(--t-fast), box-shadow var(--t-mid), background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.985); transition-duration: .06s; }
.btn svg { width: 17px; height: 17px; flex: none; transition: transform var(--t-mid); }
.btn:hover svg:last-child { transform: translateX(3px); }

.btn--primary {
  color: #04121c; background: var(--grad-brand);
  background-size: 180% 100%; background-position: 0% 50%;
  box-shadow: 0 10px 30px -12px rgba(34, 211, 238, .55);
  transition: transform var(--t-fast), box-shadow var(--t-mid), background-position .6s var(--e-out);
}
.btn--primary:hover { background-position: 100% 50%; box-shadow: 0 18px 44px -14px rgba(59, 130, 246, .65); }

.btn--ghost { border: 1px solid var(--c-line-strong); backdrop-filter: blur(8px); }
.btn--ghost:hover { border-color: var(--c-brand); color: var(--c-brand); background: rgba(34, 211, 238, .07); }

.btn--plain { padding-inline: 4px; color: var(--c-brand); }
.btn--plain:hover { transform: none; text-decoration: none; }
.btn--plain::after {
  content: ""; position: absolute; left: 4px; right: 4px; bottom: 6px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-mid);
}
.btn--plain:hover::after { transform: scaleX(1); }
.btn--lg { padding: 15px 30px; font-size: 1rem; }
.btn--sm { padding: 9px 16px; font-size: .85rem; }
.btn--block { width: 100%; }

/* ---------- 6. 卡片 / 表面 ---------- */
.card {
  position: relative; overflow: hidden;
  padding: 26px;
  border: 1px solid var(--c-line); border-radius: var(--r-lg);
  background: var(--grad-surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
  will-change: transform;
}
.card:hover { transform: translateY(-4px); border-color: var(--c-line-strong); box-shadow: var(--shadow-md); }

/* 鼠标跟随高光：--mx/--my 由 JS 用 rAF 写入 */
.spot::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 0%), rgba(34, 211, 238, .13), transparent 62%);
  opacity: 0; transition: opacity var(--t-mid);
}
.spot:hover::before { opacity: 1; }

.card__icon {
  width: 46px; height: 46px; border-radius: 13px; margin-bottom: 18px;
  display: grid; place-items: center; flex: none;
  color: var(--c-brand);
  background: rgba(34, 211, 238, .1);
  border: 1px solid rgba(34, 211, 238, .2);
  transition: transform var(--t-mid), background var(--t-mid);
}
.card:hover .card__icon { transform: scale(1.06) rotate(-4deg); background: rgba(34, 211, 238, .17); }
.card__icon svg { width: 23px; height: 23px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--c-text-mid); font-size: .94rem; }

.card--flat:hover { transform: none; }
.card--pad-lg { padding: clamp(26px, 3.4vw, 44px); }

/* 顶部渐变描边 */
.card--top::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-brand), transparent);
  opacity: 0; transition: opacity var(--t-mid);
}
.card--top:hover::after { opacity: 1; }

/* ---------- 7. 徽标 / 标签 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: var(--r-full);
  font-size: .76rem; font-weight: 600; line-height: 1.5;
  border: 1px solid var(--c-line-strong); color: var(--c-text-mid);
  background: rgba(255, 255, 255, .03);
}
.tag--brand { color: var(--c-brand); border-color: rgba(34, 211, 238, .3); background: rgba(34, 211, 238, .08); }
.tag--ok { color: var(--c-ok); border-color: rgba(52, 211, 153, .3); background: rgba(52, 211, 153, .08); }
.tag--warn { color: var(--c-warn); border-color: rgba(251, 191, 36, .3); background: rgba(251, 191, 36, .08); }
.tag--hot { color: var(--c-accent); border-color: rgba(244, 114, 182, .3); background: rgba(244, 114, 182, .08); }

.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-ok); flex: none; position: relative; }
.dot::after {
  content: ""; position: absolute; inset: -3px; border-radius: 50%;
  border: 1px solid currentColor; color: var(--c-ok);
  animation: ring 2s var(--e-io) infinite;
}
@keyframes ring { 0% { transform: scale(.6); opacity: .9; } 100% { transform: scale(1.6); opacity: 0; } }

/* ---------- 8. 顶部导航 ---------- */
.topbar {
  font-size: .8rem; color: var(--c-text-dim);
  border-bottom: 1px solid var(--c-line);
  background: var(--c-bg-soft);
}
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; height: 36px; }
.topbar a:hover { color: var(--c-brand); }
.topbar ul { display: flex; gap: 18px; align-items: center; }

.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  transition: background var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid), height var(--t-mid);
}
.nav::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: color-mix(in srgb, var(--c-bg) 72%, transparent);
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  opacity: 0; transition: opacity var(--t-mid);
}
.nav.is-stuck { border-color: var(--c-line); box-shadow: 0 8px 30px -18px rgba(0, 0, 0, .8); }
.nav.is-stuck::before { opacity: 1; }
.nav > .wrap { display: flex; align-items: center; gap: 12px; height: 100%; }

.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.06rem; letter-spacing: -.02em; margin-right: auto; }
.logo__mark {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  background: var(--grad-brand);
  box-shadow: 0 6px 18px -8px rgba(34, 211, 238, .8);
  transition: transform .5s var(--e-pop);
}
.logo:hover .logo__mark { transform: rotate(-10deg) scale(1.08); }
.logo__mark svg { width: 19px; height: 19px; color: #05131c; }
.logo__txt { display: flex; flex-direction: column; line-height: 1.15; }
.logo__txt b { font-size: .97rem; }
.logo__txt span { font-size: .62rem; letter-spacing: .22em; color: var(--c-text-dim); font-weight: 600; text-transform: uppercase; }

.menu { display: flex; align-items: center; gap: 2px; }
.menu > li { position: relative; }
.menu > li > a {
  display: flex; align-items: center; gap: 5px;
  padding: 9px 14px; border-radius: var(--r-full);
  font-size: .92rem; font-weight: 500; color: var(--c-text-mid);
  transition: color var(--t-fast), background var(--t-fast);
}
.menu > li > a:hover, .menu > li.open > a { color: var(--c-text); background: rgba(255, 255, 255, .06); }
.menu > li > a[aria-current] { color: var(--c-brand); }
.menu .caret { width: 12px; height: 12px; opacity: .6; transition: transform var(--t-mid); }
.menu > li.open .caret { transform: rotate(180deg); }

/* 下拉面板 */
.drop {
  position: absolute; top: calc(100% + 10px); left: 50%;
  width: max-content; min-width: 300px; max-width: 560px;
  padding: 12px; border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
  background: color-mix(in srgb, var(--c-bg-elev) 94%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden;
  transform: translate(-50%, -8px) scale(.97);
  transform-origin: top center;
  transition: opacity var(--t-mid), transform var(--t-mid), visibility var(--t-mid);
}
li.open > .drop { opacity: 1; visibility: visible; transform: translate(-50%, 0) scale(1); }
.drop--wide { min-width: 520px; }
.drop__grid { display: grid; gap: 4px; }
.drop--wide .drop__grid { grid-template-columns: 1fr 1fr; }
.drop a {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 11px 12px; border-radius: var(--r-md);
  transition: background var(--t-fast), transform var(--t-fast);
}
.drop a:hover { background: rgba(255, 255, 255, .06); transform: translateX(3px); }
.drop i {
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  display: grid; place-items: center; color: var(--c-brand);
  background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .18);
}
.drop i svg { width: 17px; height: 17px; }
.drop b { display: block; font-size: .9rem; font-weight: 600; }
.drop s { display: block; font-size: .78rem; color: var(--c-text-dim); text-decoration: none; line-height: 1.5; }
.drop__foot {
  margin-top: 8px; padding: 12px; border-radius: var(--r-md);
  background: rgba(255, 255, 255, .03); border: 1px solid var(--c-line);
  font-size: .8rem; color: var(--c-text-dim);
}

.nav__actions { display: flex; align-items: center; gap: 8px; margin-left: 10px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--r-full);
  display: grid; place-items: center; flex: none;
  border: 1px solid var(--c-line); color: var(--c-text-mid);
  transition: color var(--t-fast), border-color var(--t-fast), transform var(--t-fast), background var(--t-fast);
}
.icon-btn:hover { color: var(--c-brand); border-color: var(--c-brand); transform: translateY(-2px); background: rgba(34, 211, 238, .07); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn .sun { display: none; }
[data-theme="light"] .icon-btn .sun { display: block; }
[data-theme="light"] .icon-btn .moon { display: none; }

.burger { display: none; }
.burger span {
  display: block; width: 18px; height: 1.6px; border-radius: 2px; background: currentColor;
  transition: transform var(--t-mid), opacity var(--t-fast);
}
.burger span + span { margin-top: 4.5px; }
.burger.on span:nth-child(1) { transform: translateY(6.1px) rotate(45deg); }
.burger.on span:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.burger.on span:nth-child(3) { transform: translateY(-6.1px) rotate(-45deg); }

/* 阅读进度条 */
.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 200;
  transform-origin: 0 50%; transform: scaleX(0);
  background: var(--grad-brand);
  will-change: transform;
}

/* 移动端抽屉 */
.mnav {
  position: fixed; inset: var(--nav-h) 0 0; z-index: 99;
  padding: 16px 24px 40px; overflow-y: auto;
  background: color-mix(in srgb, var(--c-bg) 96%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  opacity: 0; visibility: hidden; transform: translateY(-12px);
  transition: opacity var(--t-mid), transform var(--t-mid), visibility var(--t-mid);
}
.mnav.on { opacity: 1; visibility: visible; transform: translateY(0); }
.mnav__grp { border-bottom: 1px solid var(--c-line); padding: 6px 0; }
.mnav__grp > b { display: block; font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--c-text-dim); padding: 12px 2px 6px; }
.mnav a { display: block; padding: 11px 2px; font-size: 1rem; font-weight: 500; }
.mnav a:hover { color: var(--c-brand); }
.mnav__cta { display: grid; gap: 10px; margin-top: 22px; }

/* ---------- 9. 背景装饰 ---------- */
.bg-fx { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: -1; }
.bg-fx__grid {
  position: absolute; inset: -1px;
  background-image:
    linear-gradient(to right, var(--c-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--c-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  opacity: .7;
}
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .28;
  will-change: transform;
  animation: drift 22s var(--e-io) infinite alternate;
}
.orb--1 { width: 46vw; height: 46vw; top: -14vw; left: -10vw; background: #22d3ee; }
.orb--2 { width: 40vw; height: 40vw; top: -6vw; right: -8vw; background: #8b5cf6; animation-delay: -7s; animation-duration: 28s; }
.orb--3 { width: 34vw; height: 34vw; top: 24vw; left: 30vw; background: #3b82f6; animation-delay: -14s; animation-duration: 25s; opacity: .2; }
@keyframes drift {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(4vw, 3vw, 0) scale(1.12); }
  100% { transform: translate3d(-3vw, 5vw, 0) scale(.94); }
}
[data-theme="light"] .orb { opacity: .16; }

/* 扫描光带 */
.beam {
  position: absolute; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-brand), transparent);
  opacity: .5;
}
.beam--1 { top: 22%; animation: sweep 8s linear infinite; }
.beam--2 { top: 62%; animation: sweep 11s linear infinite -4s; }
@keyframes sweep {
  0% { transform: translateX(-100%) scaleX(.4); opacity: 0; }
  35% { opacity: .6; }
  100% { transform: translateX(100%) scaleX(1); opacity: 0; }
}

/* ---------- 10. Hero ---------- */
.hero { position: relative; padding: clamp(56px, 8vw, 104px) 0 clamp(48px, 6vw, 88px); overflow: hidden; }
.hero__net { position: absolute; inset: 0; z-index: -1; opacity: .55; }
.hero__grid {
  display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: clamp(32px, 5vw, 64px); align-items: center;
}
.hero h1 { margin: 20px 0 22px; }
.hero .lead { font-size: clamp(1.02rem, 1.5vw, 1.22rem); }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.hero__meta { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--c-line); }
.hero__meta div b { display: block; font-size: 1.5rem; font-weight: 700; letter-spacing: -.03em; }
.hero__meta div span { font-size: .8rem; color: var(--c-text-dim); }

/* 控制台预览窗 */
.win {
  border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden;
  background: color-mix(in srgb, var(--c-bg-elev) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  transform: perspective(1400px) rotateY(-7deg) rotateX(3deg);
  transition: transform 1s var(--e-out);
}
.win:hover { transform: perspective(1400px) rotateY(-2deg) rotateX(1deg) translateY(-6px); }
.win__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px; border-bottom: 1px solid var(--c-line);
  background: rgba(255, 255, 255, .03);
}
.win__bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--c-line-strong); }
.win__bar i:nth-child(1) { background: #ff5f57; } .win__bar i:nth-child(2) { background: #febc2e; } .win__bar i:nth-child(3) { background: #28c840; }
.win__bar b { margin-left: 8px; font-size: .78rem; font-weight: 500; color: var(--c-text-dim); }
.win__body { padding: 18px; display: grid; gap: 12px; }

.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat-row div { padding: 12px; border-radius: var(--r-md); background: rgba(255, 255, 255, .035); border: 1px solid var(--c-line); }
.stat-row s { display: block; font-size: .7rem; color: var(--c-text-dim); text-decoration: none; }
.stat-row b { font-size: 1.24rem; letter-spacing: -.02em; }

.meter { height: 5px; border-radius: var(--r-full); background: rgba(255, 255, 255, .08); overflow: hidden; margin-top: 8px; }
.meter i {
  display: block; height: 100%; border-radius: inherit;
  background: var(--grad-brand);
  transform-origin: left; transform: scaleX(0);
  transition: transform 1.4s var(--e-out) .2s;
}
.in .meter i { transform: scaleX(var(--v, .6)); }

.spark { display: flex; align-items: flex-end; gap: 3px; height: 54px; }
.spark i {
  flex: 1; border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, var(--c-brand), rgba(59, 130, 246, .18));
  transform-origin: bottom; transform: scaleY(.05); opacity: .3;
  transition: transform .8s var(--e-out), opacity .8s var(--e-out);
}
.in .spark i { transform: scaleY(var(--h, .5)); opacity: 1; }

.log { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .74rem; line-height: 1.9; color: var(--c-text-dim); }
.log b { color: var(--c-ok); font-weight: 500; }
.log em { color: var(--c-brand); font-style: normal; }

/* ---------- 11. 走马灯 ---------- */
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track { display: flex; width: max-content; gap: 56px; animation: slide 42s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track > * { flex: none; }
@keyframes slide { to { transform: translateX(-50%); } }
.mq-item { display: flex; align-items: center; gap: 10px; color: var(--c-text-dim); font-weight: 600; font-size: .95rem; transition: color var(--t-fast); }
.mq-item:hover { color: var(--c-text); }
.mq-item svg { width: 22px; height: 22px; opacity: .8; }

/* ---------- 12. 数据统计带 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; }
.stats > div { padding: 30px 24px; background: var(--c-bg); text-align: center; transition: background var(--t-mid); }
.stats > div:hover { background: var(--c-bg-elev); }
.stats b { display: block; font-size: clamp(1.9rem, 3.6vw, 2.9rem); font-weight: 800; letter-spacing: -.04em; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stats span { font-size: .84rem; color: var(--c-text-dim); }

/* ---------- 13. 功能区 ---------- */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.bento > * { grid-column: span 2; }
.bento > .w3 { grid-column: span 3; }
.bento > .w4 { grid-column: span 4; }
.bento > .w6 { grid-column: span 6; }

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(28px, 5vw, 64px); align-items: center; }
.split--rev > *:first-child { order: 2; }

.feat-list { display: grid; gap: 16px; margin-top: 26px; }
.feat-list li { display: flex; gap: 13px; }
.feat-list svg { width: 20px; height: 20px; flex: none; color: var(--c-ok); margin-top: 4px; }
.feat-list b { display: block; font-size: .96rem; }
.feat-list p { font-size: .89rem; color: var(--c-text-dim); }

/* ---------- 14. 价格 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; align-items: start; }
.plan { position: relative; display: flex; flex-direction: column; }
.plan--hot { border-color: rgba(34, 211, 238, .4); box-shadow: var(--glow); }
.plan--hot::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  background: linear-gradient(160deg, rgba(34, 211, 238, .12), transparent 55%);
}
.plan__badge { position: absolute; top: 16px; right: 16px; }
.plan__name { font-size: 1.06rem; font-weight: 700; }
.plan__desc { font-size: .84rem; color: var(--c-text-dim); min-height: 2.6em; margin-top: 4px; }
.plan__price { display: flex; align-items: baseline; gap: 4px; margin: 18px 0 4px; }
.plan__price b { font-size: 2.5rem; font-weight: 800; letter-spacing: -.04em; line-height: 1; }
.plan__price s { text-decoration: none; font-size: .86rem; color: var(--c-text-dim); }
.plan__cur { font-size: 1.05rem; font-weight: 600; color: var(--c-text-mid); }
.plan__spec { display: grid; gap: 11px; margin: 22px 0; padding-top: 20px; border-top: 1px dashed var(--c-line-strong); font-size: .88rem; }
.plan__spec li { display: flex; gap: 10px; align-items: flex-start; color: var(--c-text-mid); }
.plan__spec svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: var(--c-brand); }
.plan__spec b { color: var(--c-text); font-weight: 600; }
.plan .btn { margin-top: auto; }

/* 计费周期切换 */
.switch { display: inline-flex; padding: 4px; border-radius: var(--r-full); border: 1px solid var(--c-line); background: rgba(255, 255, 255, .03); position: relative; }
.switch button {
  position: relative; z-index: 1; padding: 8px 18px; border-radius: var(--r-full);
  font-size: .86rem; font-weight: 600; color: var(--c-text-dim);
  transition: color var(--t-mid);
}
.switch button.on { color: #04121c; }
.switch__thumb {
  position: absolute; top: 4px; bottom: 4px; left: 4px;
  border-radius: var(--r-full); background: var(--grad-brand);
  transition: transform .45s var(--e-out), width .45s var(--e-out);
  will-change: transform;
}

/* ---------- 15. 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--r-lg); background: var(--grad-surface); }
table.tbl { min-width: 720px; font-size: .9rem; }
table.tbl th, table.tbl td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--c-line); }
table.tbl thead th {
  font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--c-text-dim); background: rgba(255, 255, 255, .03);
  position: sticky; top: 0; backdrop-filter: blur(8px);
}
table.tbl tbody tr { transition: background var(--t-fast); }
table.tbl tbody tr:hover { background: rgba(34, 211, 238, .05); }
table.tbl tbody tr:last-child td { border-bottom: 0; }
table.tbl td b { font-weight: 600; }
table.tbl .num { font-variant-numeric: tabular-nums; }
.price-cell { color: var(--c-brand); font-weight: 700; }

/* ---------- 16. 标签页 ---------- */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; padding: 5px; border-radius: var(--r-full); border: 1px solid var(--c-line); background: rgba(255, 255, 255, .03); width: max-content; max-width: 100%; }
.tabs button {
  padding: 9px 18px; border-radius: var(--r-full);
  font-size: .88rem; font-weight: 600; color: var(--c-text-dim);
  transition: color var(--t-fast), background var(--t-fast);
}
.tabs button:hover { color: var(--c-text); }
.tabs button.on { color: #04121c; background: var(--grad-brand); }
.panel { display: none; animation: panelIn .5s var(--e-out); }
.panel.on { display: block; }
@keyframes panelIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- 17. 折叠面板 ---------- */
.acc { display: grid; gap: 12px; }
.acc__item { border: 1px solid var(--c-line); border-radius: var(--r-md); overflow: hidden; background: var(--grad-surface); transition: border-color var(--t-mid); }
.acc__item.on { border-color: rgba(34, 211, 238, .35); }
.acc__q {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%;
  padding: 18px 22px; text-align: left; font-weight: 600; font-size: .98rem;
  transition: color var(--t-fast);
}
.acc__q:hover { color: var(--c-brand); }
.acc__q i { width: 22px; height: 22px; flex: none; position: relative; }
.acc__q i::before, .acc__q i::after {
  content: ""; position: absolute; inset: 50% 2px auto; height: 1.6px; border-radius: 2px;
  background: currentColor; transition: transform var(--t-mid);
}
.acc__q i::after { transform: rotate(90deg); }
.acc__item.on .acc__q i::after { transform: rotate(0); }
.acc__a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .42s var(--e-out); }
.acc__item.on .acc__a { grid-template-rows: 1fr; }
.acc__a > div { overflow: hidden; }
.acc__a p { padding: 0 22px 20px; color: var(--c-text-mid); font-size: .92rem; }

/* ---------- 18. 时间线 / 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps > li { position: relative; padding-top: 30px; }
.steps > li::before {
  counter-increment: s; content: counter(s, decimal-leading-zero);
  position: absolute; top: 0; left: 0;
  font-size: .8rem; font-weight: 700; color: var(--c-brand); letter-spacing: .1em;
}
.steps > li::after {
  content: ""; position: absolute; top: 8px; left: 34px; right: -20px; height: 1px;
  background: linear-gradient(90deg, var(--c-line-strong), transparent);
}
.steps > li:last-child::after { display: none; }
.steps b { display: block; margin-bottom: 8px; font-size: 1.02rem; }
.steps p { font-size: .88rem; color: var(--c-text-dim); }

.timeline { position: relative; padding-left: 30px; display: grid; gap: 32px; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 1px; background: linear-gradient(180deg, var(--c-brand), transparent); }
.timeline > li { position: relative; }
.timeline > li::before {
  content: ""; position: absolute; left: -30px; top: 8px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--c-bg); border: 2px solid var(--c-brand);
}
.timeline time { font-size: .8rem; font-weight: 700; color: var(--c-brand); letter-spacing: .08em; }
.timeline b { display: block; margin: 4px 0 6px; font-size: 1.04rem; }
.timeline p { font-size: .9rem; color: var(--c-text-mid); }

/* ---------- 19. 节点地图 ---------- */
.nodes { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 12px; }
.node {
  display: flex; align-items: center; gap: 11px;
  padding: 13px 15px; border-radius: var(--r-md);
  border: 1px solid var(--c-line); background: var(--grad-surface);
  transition: transform var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.node:hover { transform: translateY(-3px); border-color: rgba(34, 211, 238, .35); background: rgba(34, 211, 238, .05); }
.node b { display: block; font-size: .9rem; font-weight: 600; }
.node s { display: block; text-decoration: none; font-size: .74rem; color: var(--c-text-dim); }

.map { position: relative; aspect-ratio: 16 / 10; border-radius: var(--r-lg); border: 1px solid var(--c-line); overflow: hidden; background: radial-gradient(ellipse at 50% 50%, rgba(34, 211, 238, .07), transparent 70%), var(--c-bg-soft); }
.map__pin { position: absolute; transform: translate(-50%, -50%); }
.map__pin i { display: block; width: 8px; height: 8px; border-radius: 50%; background: var(--c-brand); box-shadow: 0 0 12px var(--c-brand); }
.map__pin i::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 1px solid var(--c-brand); animation: ring 2.6s var(--e-io) infinite; }
.map__pin span {
  position: absolute; left: 14px; top: -6px; white-space: nowrap;
  font-size: .72rem; font-weight: 600; color: var(--c-text-mid);
  opacity: 0; transform: translateX(-4px); transition: opacity var(--t-mid), transform var(--t-mid);
}
.map__pin:hover span { opacity: 1; transform: translateX(0); }
.map__pin:nth-child(2n) i::after { animation-delay: -.9s; }
.map__pin:nth-child(3n) i::after { animation-delay: -1.7s; }

/* ---------- 20. 引用 / 客户 ---------- */
.quote { display: flex; flex-direction: column; gap: 18px; }
.quote__txt { font-size: .96rem; color: var(--c-text-mid); }
.quote__who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.avatar {
  width: 40px; height: 40px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-weight: 700; font-size: .9rem; color: #04121c;
  background: var(--grad-brand);
}
.stars { display: flex; gap: 3px; color: var(--c-warn); }
.stars svg { width: 15px; height: 15px; }

/* ---------- 21. 表单 ---------- */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field label { font-size: .84rem; font-weight: 600; color: var(--c-text-mid); }
.field label s { color: var(--c-accent); text-decoration: none; }
.ctl {
  width: 100%; padding: 12px 15px; border-radius: var(--r-md);
  border: 1px solid var(--c-line); background: rgba(255, 255, 255, .035);
  font-size: .93rem; color: var(--c-text);
  transition: border-color var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
}
.ctl::placeholder { color: var(--c-text-dim); }
.ctl:hover { border-color: var(--c-line-strong); }
.ctl:focus { outline: 0; border-color: var(--c-brand); background: rgba(34, 211, 238, .05); box-shadow: 0 0 0 3px rgba(34, 211, 238, .14); }
textarea.ctl { min-height: 128px; resize: vertical; }
select.ctl { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f7a94' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 16px; padding-right: 40px; }
.form__note { font-size: .8rem; color: var(--c-text-dim); }
.form__ok {
  display: none; padding: 13px 16px; border-radius: var(--r-md);
  border: 1px solid rgba(52, 211, 153, .35); background: rgba(52, 211, 153, .1);
  color: var(--c-ok); font-size: .89rem;
}
.form__ok.on { display: block; animation: panelIn .4s var(--e-out); }

/* ---------- 22. CTA ---------- */
.cta {
  position: relative; overflow: hidden;
  padding: clamp(40px, 6vw, 76px);
  border-radius: var(--r-xl); border: 1px solid var(--c-line);
  background: linear-gradient(140deg, rgba(34, 211, 238, .12), rgba(139, 92, 246, .1) 60%, transparent), var(--c-bg-soft);
  text-align: center;
}
.cta::before {
  content: ""; position: absolute; top: -60%; left: 50%; width: 70%; aspect-ratio: 1;
  transform: translateX(-50%); border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, .2), transparent 65%);
  animation: drift 18s var(--e-io) infinite alternate;
}
.cta > * { position: relative; }
.cta h2 { margin-bottom: 14px; }
.cta .lead { margin-inline: auto; }

/* ---------- 23. 页脚 ---------- */
.foot { border-top: 1px solid var(--c-line); background: var(--c-bg-soft); padding: clamp(48px, 6vw, 72px) 0 28px; }
.foot__top { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 40px; }
.foot__brand p { font-size: .88rem; color: var(--c-text-dim); margin-top: 16px; max-width: 34ch; }
.foot h4 { font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; color: var(--c-text-dim); margin-bottom: 16px; }
.foot ul { display: grid; gap: 11px; }
.foot ul a { font-size: .89rem; color: var(--c-text-mid); transition: color var(--t-fast), transform var(--t-fast); display: inline-block; }
.foot ul a:hover { color: var(--c-brand); transform: translateX(3px); }
.foot__bar {
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
  margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--c-line);
  font-size: .82rem; color: var(--c-text-dim);
}
.foot__bar a:hover { color: var(--c-brand); }
.socials { display: flex; gap: 8px; }
.socials a { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--c-line); transition: all var(--t-fast); }
.socials a:hover { color: var(--c-brand); border-color: var(--c-brand); transform: translateY(-3px); }
.socials svg { width: 16px; height: 16px; }

.totop {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--c-line-strong); color: var(--c-text);
  background: color-mix(in srgb, var(--c-bg-elev) 88%, transparent);
  backdrop-filter: blur(10px);
  opacity: 0; visibility: hidden; transform: translateY(14px) scale(.9);
  transition: opacity var(--t-mid), transform var(--t-mid), visibility var(--t-mid), border-color var(--t-fast), color var(--t-fast);
  box-shadow: var(--shadow-md);
}
.totop.on { opacity: 1; visibility: visible; transform: none; }
.totop:hover { color: var(--c-brand); border-color: var(--c-brand); transform: translateY(-3px); }
.totop svg { width: 18px; height: 18px; }

/* ---------- 24. 页面头部（子页） ---------- */
.phead { position: relative; padding: clamp(48px, 6vw, 84px) 0 clamp(32px, 4vw, 52px); overflow: hidden; border-bottom: 1px solid var(--c-line); }
.phead h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); margin: 18px 0 16px; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: .82rem; color: var(--c-text-dim); }
.crumb a:hover { color: var(--c-brand); }
.crumb svg { width: 13px; height: 13px; opacity: .5; }

/* ---------- 25. 滚动入场动画 ---------- */
[data-rv] {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity .78s var(--e-out), transform .78s var(--e-out);
  transition-delay: var(--d, 0ms);
}
[data-rv="l"] { transform: translate3d(-26px, 0, 0); }
[data-rv="r"] { transform: translate3d(26px, 0, 0); }
[data-rv="s"] { transform: scale(.955); }
[data-rv="f"] { transform: none; }
.in[data-rv] { opacity: 1; transform: none; }

/* 无障碍：尊重系统减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important; scroll-behavior: auto !important;
  }
  [data-rv] { opacity: 1; transform: none; }
  .win { transform: none; }
}

/* ---------- 26. 响应式 ---------- */
@media (max-width: 1080px) {
  .foot__top { grid-template-columns: 1fr 1fr 1fr; }
  .foot__brand { grid-column: 1 / -1; }
  .price-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps > li:nth-child(2n)::after { display: none; }
}

@media (max-width: 940px) {
  .menu, .nav__actions .btn { display: none; }
  .burger { display: grid; }
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { max-width: 560px; }
  .win { transform: none; }
  .split, .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .bento > * , .bento > .w3, .bento > .w4 { grid-column: span 6; }
  .split--rev > *:first-child { order: 0; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .topbar ul.hide-sm { display: none; }
}

@media (max-width: 640px) {
  :root { --nav-h: 60px; }
  .wrap { padding-inline: 18px; }
  .price-grid, .steps { grid-template-columns: 1fr; }
  .steps > li::after { display: none; }
  .hero__meta { gap: 18px; }
  .hero__meta div b { font-size: 1.26rem; }
  .card { padding: 20px; }
  .foot__top { grid-template-columns: 1fr 1fr; }
  .totop { right: 14px; bottom: 14px; }
  .bg-fx__grid { background-size: 40px 40px; }
}

/* 打印 */
@media print {
  .nav, .topbar, .mnav, .totop, .bg-fx, .progress, .cta { display: none !important; }
  body { background: #fff; color: #000; }
}