/* 涡流官网 · 公共样式 */
:root {
  --ink: #090a1c;
  --ink-2: #10122e;
  --ink-3: #1a1d45;
  --indigo: #3d2ff0;
  --violet: #7b3af5;
  --cyan: #1fe3f2;
  --brand: #5b35f2;
  --brand-deep: #2f22b8;
  --grad: linear-gradient(120deg, #3d2ff0 0%, #7b3af5 52%, #1fe3f2 100%);
  --grad-soft: linear-gradient(135deg, rgba(61,47,240,.10), rgba(31,227,242,.08));
  --text: #0e1030;
  --text-2: #3b3f5c;
  --muted: #6a6f8c;
  --line: #e5e7f1;
  --line-2: #eef0f6;
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --bg-tint: #f3f1ff;
  --on-dark: #eef0ff;
  --on-dark-2: #a9addb;
  --on-dark-line: rgba(255,255,255,.10);
  --ok: #12b886;
  --warn: #f59f00;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 1px 2px rgba(14,16,48,.04), 0 8px 24px rgba(14,16,48,.06);
  --shadow-lg: 0 30px 80px -20px rgba(20,16,90,.35);
  --container: 1200px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--text); background: var(--bg);
  font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .grad-text, .dark .grad-text, .cta-box .grad-text { background-image: linear-gradient(120deg, #a493ff 0%, #c08cff 45%, #5ee7f5 100%); }
.nowrap { white-space: nowrap; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; transition: transform .2s, box-shadow .2s, background .2s, color .2s, border-color .2s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px -8px rgba(91,53,242,.65); background-size: 140% 100%; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 16px 40px -10px rgba(91,53,242,.75); background-position: 100% 0; }
.btn-ghost { color: var(--on-dark); border-color: rgba(255,255,255,.22); background: rgba(255,255,255,.04); backdrop-filter: blur(6px); }
.btn-ghost:hover { border-color: rgba(255,255,255,.5); background: rgba(255,255,255,.08); }
.btn-outline { color: var(--text); border-color: var(--line); background: #fff; }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; color: var(--brand); font-weight: 600; font-size: 15px; }
.link-arrow svg { width: 16px; height: 16px; transition: transform .2s; }
.link-arrow:hover svg { transform: translateX(3px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: 72px;
  transition: background .3s, box-shadow .3s, border-color .3s; border-bottom: 1px solid transparent;
}
.site-header .container { display: flex; align-items: center; height: 100%; gap: 40px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 20px; letter-spacing: .02em; flex-shrink: 0; }
.brand img { width: 34px; height: 34px; }
.brand small { font-size: 12px; font-weight: 500; opacity: .7; letter-spacing: .08em; padding-left: 10px; margin-left: 2px; border-left: 1px solid currentColor; }
.nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav > li { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 4px; height: 72px; padding: 0 14px; color: rgba(255,255,255,.82);
  font-size: 15px; font-weight: 500; transition: color .2s; background: none; border: 0;
}
.nav-link svg { width: 14px; height: 14px; transition: transform .2s; }
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link.active { box-shadow: inset 0 -2px 0 var(--cyan); }
.header-cta { display: flex; align-items: center; gap: 12px; }
.header-cta .text-link { color: rgba(255,255,255,.82); font-size: 15px; font-weight: 500; }
.header-cta .text-link:hover { color: #fff; }

.site-header.scrolled, .site-header.solid { background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(16px); border-bottom-color: var(--line); }
.site-header.scrolled .brand, .site-header.solid .brand { color: var(--text); }
.site-header.scrolled .nav-link, .site-header.solid .nav-link,
.site-header.scrolled .header-cta .text-link, .site-header.solid .header-cta .text-link { color: var(--text-2); }
.site-header.scrolled .nav-link:hover, .site-header.solid .nav-link:hover,
.site-header.scrolled .nav-link.active, .site-header.solid .nav-link.active { color: var(--brand); }
.site-header.scrolled .nav-link.active, .site-header.solid .nav-link.active { box-shadow: inset 0 -2px 0 var(--brand); }

/* 产品下拉 */
.mega {
  position: absolute; top: 100%; left: -24px; width: 680px; padding: 22px; border-radius: 20px;
  background: #fff; border: 1px solid var(--line); box-shadow: 0 30px 70px -20px rgba(14,16,48,.28);
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .2s, transform .2s, visibility .2s;
}
.has-mega:hover .mega, .has-mega:focus-within .mega, .has-mega.open .mega { opacity: 1; visibility: visible; transform: none; }
.has-mega:hover .nav-link svg { transform: rotate(180deg); }
.mega a { display: flex; gap: 14px; padding: 14px; border-radius: 14px; transition: background .2s; }
.mega a:hover { background: var(--bg-soft); }
.mega .mi { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; flex-shrink: 0; background: var(--bg-tint); color: var(--brand); }
.mega .mi svg { width: 20px; height: 20px; }
.mega strong { display: block; font-size: 15px; color: var(--text); }
.mega span { display: block; font-size: 13px; color: var(--muted); line-height: 1.5; margin-top: 2px; }
.mega .mega-foot { grid-column: 1 / -1; margin-top: 8px; padding: 14px 16px; border-radius: 14px; background: var(--grad-soft); display: flex; justify-content: space-between; align-items: center; font-size: 14px; color: var(--text-2); }

.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 0; background: none; color: #fff; border-radius: 10px; }
.nav-toggle svg { width: 24px; height: 24px; margin: auto; }
.site-header.scrolled .nav-toggle, .site-header.solid .nav-toggle { color: var(--text); }

/* ---------- 首屏 / 页头 ---------- */
.hero {
  position: relative; color: var(--on-dark); background: var(--ink); overflow: hidden; isolation: isolate;
  padding: 168px 0 120px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(60% 60% at 78% 20%, rgba(123,58,245,.35), transparent 60%),
    radial-gradient(45% 50% at 10% 90%, rgba(61,47,240,.35), transparent 60%),
    radial-gradient(30% 35% at 95% 85%, rgba(31,227,242,.16), transparent 60%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(70% 70% at 50% 30%, #000 30%, transparent 75%);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px 6px 8px; border-radius: 999px;
  font-size: 13px; font-weight: 600; letter-spacing: .04em; color: #d9dcff;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
}
.eyebrow .dot { width: 20px; height: 20px; border-radius: 50%; background: var(--grad); display: grid; place-items: center; }
.eyebrow .dot::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #fff; }
.eyebrow-light { color: var(--brand); background: var(--bg-tint); border-color: transparent; }

.hero-home .container { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(36px, 5.2vw, 64px); font-weight: 800; margin: 24px 0 22px; letter-spacing: -.02em; color: #fff; }
.hero .lead { font-size: clamp(16px, 1.5vw, 19px); color: var(--on-dark-2); max-width: 560px; line-height: 1.8; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 26px; margin-top: 44px; font-size: 14px; color: var(--on-dark-2); }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--cyan); }

.page-hero { padding: 160px 0 96px; }
.page-hero .container { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.page-hero.center .container { grid-template-columns: 1fr; text-align: center; justify-items: center; }
.page-hero.center .lead { margin: 0 auto; max-width: 720px; }
.page-hero h1 { font-size: clamp(34px, 4.4vw, 54px); }
.crumbs { display: flex; gap: 8px; font-size: 13px; color: var(--on-dark-2); margin-bottom: 20px; }
.crumbs a:hover { color: #fff; }

/* 漩涡视觉 */
.vortex { position: relative; aspect-ratio: 1; width: min(100%, 520px); margin: 0 auto; }
.vortex .ring { position: absolute; inset: 0; border-radius: 50%; }
.vortex .r1 { background: conic-gradient(from 0deg, transparent 0 55%, rgba(31,227,242,.85) 75%, transparent 76%); -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); animation: spin 14s linear infinite; }
.vortex .r2 { inset: 10%; background: conic-gradient(from 120deg, transparent 0 40%, rgba(123,58,245,.9) 70%, transparent 71%); -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); animation: spin 10s linear infinite reverse; }
.vortex .r3 { inset: 22%; background: conic-gradient(from 240deg, transparent 0 50%, rgba(61,47,240,.95) 80%, transparent 81%); -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px)); animation: spin 7s linear infinite; }
.vortex .glow { inset: 30%; background: radial-gradient(circle, rgba(123,58,245,.55), transparent 70%); filter: blur(20px); }
.vortex img { position: absolute; inset: 34%; width: 32%; height: 32%; animation: spin 24s linear infinite; filter: drop-shadow(0 0 30px rgba(123,58,245,.6)); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 通用区块 ---------- */
.section { padding: 120px 0; position: relative; }
.section-sm { padding: 80px 0; }
.section.soft { background: var(--bg-soft); }
.section.tint { background: linear-gradient(180deg, #f7f5ff, #fff); }
.section.dark { background: var(--ink); color: var(--on-dark); overflow: hidden; isolation: isolate; }
.section.dark::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(50% 60% at 85% 0%, rgba(123,58,245,.28), transparent 60%), radial-gradient(40% 50% at 0% 100%, rgba(61,47,240,.25), transparent 60%); }
.section-head { max-width: 760px; margin-bottom: 64px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .16em; color: var(--brand); margin-bottom: 16px; }
.dark .kicker { color: var(--cyan); }
.section-head h2 { font-size: clamp(28px, 3.4vw, 42px); font-weight: 800; letter-spacing: -.02em; }
.section-head p { margin-top: 18px; font-size: 17px; color: var(--muted); line-height: 1.85; }
.dark .section-head p { color: var(--on-dark-2); }
.dark h2, .dark h3 { color: #fff; }

/* 平台条 */
.platforms { padding: 36px 0; border-bottom: 1px solid var(--line); background: #fff; }
.platforms .container { display: flex; align-items: center; gap: 40px; }
.platforms .label { font-size: 14px; color: var(--muted); white-space: nowrap; flex-shrink: 0; }
.marquee { overflow: hidden; flex: 1; min-width: 0; width: 100%; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; gap: 14px; width: max-content; animation: marquee 40s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.chip { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 18px; border-radius: 999px; background: var(--bg-soft); border: 1px solid var(--line-2); font-size: 14px; font-weight: 600; color: var(--text-2); white-space: nowrap; }
.chip i { width: 8px; height: 8px; border-radius: 50%; background: var(--grad); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* 卡片网格 */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  position: relative; padding: 32px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -24px rgba(30,20,120,.25); border-color: #d9d6fb; }
.card h3 { font-size: 20px; margin: 22px 0 10px; }
.card p { color: var(--muted); font-size: 15px; line-height: 1.8; }
.card .link-arrow { margin-top: 22px; }
.card-icon { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff; background: var(--grad); box-shadow: 0 12px 24px -10px rgba(91,53,242,.6); }
.card-icon svg { width: 24px; height: 24px; }
.card-icon.soft { background: var(--bg-tint); color: var(--brand); box-shadow: none; }
.card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag { font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: var(--bg-soft); color: var(--text-2); border: 1px solid var(--line-2); }
.dark .card { background: rgba(255,255,255,.04); border-color: var(--on-dark-line); }
.dark .card:hover { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.2); box-shadow: none; }
.dark .card p { color: var(--on-dark-2); }
.dark .tag { background: rgba(255,255,255,.06); border-color: var(--on-dark-line); color: var(--on-dark-2); }
.card-num { position: absolute; top: 28px; right: 32px; font-family: var(--mono); font-size: 13px; color: #b9bbd3; }

.module-card { display: flex; flex-direction: column; overflow: hidden; }
.module-card .link-arrow { margin-top: auto; padding-top: 22px; }
.module-card::after { content: ""; position: absolute; right: -60px; top: -60px; width: 180px; height: 180px; border-radius: 50%; background: radial-gradient(circle, rgba(123,58,245,.12), transparent 70%); transition: transform .4s; }
.module-card:hover::after { transform: scale(1.4); }

.span-2 { grid-column: span 2; }
@media (max-width: 760px) { .span-2 { grid-column: auto; } }

/* 左右图文 */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 72px; align-items: center; }
.split > *, .grid > *, .hero .container > * { min-width: 0; }
.split.reverse .split-media { order: -1; }
.split + .split { margin-top: 120px; }
.split h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; letter-spacing: -.02em; }
.split .desc { margin-top: 18px; color: var(--muted); font-size: 16.5px; line-height: 1.9; }
.dark .split .desc { color: var(--on-dark-2); }
.checks { margin-top: 28px; display: grid; gap: 14px; }
.checks li { display: flex; gap: 12px; font-size: 15.5px; color: var(--text-2); line-height: 1.7; }
.dark .checks li { color: var(--on-dark); }
.checks li svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--brand); margin-top: 1px; }
.dark .checks li svg { color: var(--cyan); }
.checks b { color: var(--text); }
.dark .checks b { color: #fff; }

/* 数据带 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-radius: var(--radius-lg); border: 1px solid var(--on-dark-line); background: rgba(255,255,255,.03); }
.stat { padding: 40px 32px; border-right: 1px solid var(--on-dark-line); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: clamp(36px, 4vw, 52px); font-weight: 800; letter-spacing: -.02em; line-height: 1; }
.stat span { display: block; margin-top: 12px; color: var(--on-dark-2); font-size: 15px; }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; position: relative; }
.steps::before { content: ""; position: absolute; left: 6%; right: 6%; top: 27px; height: 2px; background: linear-gradient(90deg, var(--indigo), var(--violet), var(--cyan)); opacity: .35; }
.step { position: relative; padding: 0 20px; text-align: center; }
.step .n { width: 56px; height: 56px; margin: 0 auto 22px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 18px; color: #fff; background: var(--grad); box-shadow: 0 0 0 8px #fff, 0 14px 30px -10px rgba(91,53,242,.6); position: relative; }
.soft .step .n { box-shadow: 0 0 0 8px var(--bg-soft), 0 14px 30px -10px rgba(91,53,242,.6); }
.dark .step .n { box-shadow: 0 0 0 8px var(--ink), 0 14px 30px -10px rgba(91,53,242,.6); }
.step .n svg { width: 24px; height: 24px; }
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--muted); line-height: 1.75; }
.dark .step p { color: var(--on-dark-2); }
.steps.five { grid-template-columns: repeat(5, 1fr); }
.steps.four { grid-template-columns: repeat(4, 1fr); }
.steps.three { grid-template-columns: repeat(3, 1fr); }

/* CTA */
.cta-band { padding: 0 0 120px; }
.cta-box {
  position: relative; overflow: hidden; isolation: isolate; border-radius: 32px; padding: 72px 64px; color: #fff;
  background: var(--ink); display: grid; grid-template-columns: 1.3fr auto; align-items: center; gap: 40px;
}
.cta-box::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 120% at 100% 0%, rgba(123,58,245,.55), transparent 60%), radial-gradient(50% 100% at 0% 100%, rgba(61,47,240,.5), transparent 60%), radial-gradient(30% 60% at 70% 100%, rgba(31,227,242,.25), transparent 60%); }
.cta-box::after { content: ""; position: absolute; right: -120px; top: 50%; width: 420px; height: 420px; transform: translateY(-50%); z-index: -1; background: url("../img/logo.png") center/contain no-repeat; opacity: .14; animation: spin 40s linear infinite; }
.cta-box h2 { font-size: clamp(26px, 3.2vw, 40px); font-weight: 800; }
.cta-box p { margin-top: 14px; color: var(--on-dark-2); font-size: 17px; }
.cta-box .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* 页脚 */
.site-footer { background: var(--ink); color: var(--on-dark-2); padding: 80px 0 36px; font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 40px; padding-bottom: 56px; border-bottom: 1px solid var(--on-dark-line); }
.footer-brand p { margin-top: 18px; line-height: 1.9; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.footer-col li + li { margin-top: 12px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; padding-top: 28px; font-size: 13px; color: #7d81ab; }
.footer-bottom nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 产品界面示意（自绘） ---------- */
.window {
  position: relative; border-radius: 18px; background: #fff; overflow: hidden; color: var(--text);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,.08); font-size: 13px; line-height: 1.6;
}
.hero .window { box-shadow: 0 40px 100px -20px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.12); }
.window-bar { height: 38px; display: flex; align-items: center; gap: 8px; padding: 0 14px; background: #f4f5fa; border-bottom: 1px solid var(--line); }
.window-bar i { width: 11px; height: 11px; border-radius: 50%; background: #e1e3ee; }
.window-bar i:nth-child(1) { background: #ff6b6b; } .window-bar i:nth-child(2) { background: #fcc419; } .window-bar i:nth-child(3) { background: #51cf66; }
.window-bar span { margin-left: 10px; font-size: 12px; color: var(--muted); }
.window-body { display: grid; grid-template-columns: 148px 1fr; min-height: 380px; }
.app-side { background: #121433; color: #c3c6ee; padding: 14px 10px; display: flex; flex-direction: column; gap: 2px; }
.app-side .logo { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 700; font-size: 13px; padding: 4px 6px 14px; }
.app-side .logo img { width: 22px; height: 22px; }
.app-side .it { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 8px; font-size: 12px; }
.app-side .it::before { content: ""; width: 6px; height: 6px; border-radius: 2px; background: currentColor; opacity: .5; }
.app-side .it.on { background: linear-gradient(90deg, rgba(123,58,245,.45), rgba(61,47,240,.2)); color: #fff; }
.app-main { padding: 18px 20px; background: #fafbff; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.app-title { font-weight: 700; font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: #eef0ff; color: var(--brand); white-space: nowrap; }
.pill.ok { background: #e6fcf5; color: #0c8f69; } .pill.warn { background: #fff4e6; color: #d9480f; } .pill.gray { background: #f1f3f5; color: #6a6f8c; }
.pill.ok::before, .pill.warn::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.msg { display: flex; gap: 10px; align-items: flex-start; max-width: 92%; }
.msg .av { width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0; background: #fff; border: 1px solid var(--line); display: grid; place-items: center; overflow: hidden; }
.msg .av img { width: 20px; height: 20px; }
.msg .av svg { width: 15px; height: 15px; color: var(--brand); }
.msg .bubble { padding: 10px 13px; border-radius: 4px 14px 14px 14px; background: #fff; border: 1px solid var(--line); box-shadow: 0 2px 6px rgba(14,16,48,.04); }
.msg.me { align-self: flex-end; flex-direction: row-reverse; }
.msg.me .bubble { background: var(--grad); color: #fff; border: 0; border-radius: 14px 4px 14px 14px; }
.msg.me .av { background: #e7e5ff; color: var(--brand); font-weight: 700; font-size: 11px; }
.plan { border: 1px solid #ddd8ff; border-radius: 14px; background: #fff; overflow: hidden; }
.plan-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; background: linear-gradient(90deg, #f3f0ff, #effcff); font-weight: 700; font-size: 12.5px; }
.plan-row { display: flex; justify-content: space-between; gap: 12px; padding: 7px 14px; border-top: 1px solid var(--line-2); font-size: 12px; }
.plan-row span:first-child { color: var(--muted); white-space: nowrap; }
.plan-row span:last-child { text-align: right; font-weight: 600; }
.plan-actions { display: flex; gap: 8px; padding: 10px 14px; border-top: 1px solid var(--line-2); justify-content: flex-end; }
.mini-btn { font-size: 11.5px; font-weight: 600; padding: 4px 12px; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
.mini-btn.pri { background: var(--grad); color: #fff; border: 0; }
.input-bar { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line); background: #fff; color: #9aa0bd; font-size: 12px; }
.input-bar b { width: 26px; height: 26px; border-radius: 8px; background: var(--grad); flex-shrink: 0; }
.task { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; background: #fff; border: 1px solid var(--line); }
.task .ti { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; background: var(--bg-tint); color: var(--brand); flex-shrink: 0; }
.task .ti svg { width: 16px; height: 16px; }
.task .tt { flex: 1; min-width: 0; }
.task .tt b { display: block; font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.task .tt small { color: var(--muted); font-size: 11px; }
.bar { height: 6px; border-radius: 999px; background: #eceef6; overflow: hidden; margin-top: 5px; }
.bar i { display: block; height: 100%; border-radius: inherit; background: var(--grad); }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.kpi { padding: 12px; border-radius: 12px; background: #fff; border: 1px solid var(--line); }
.kpi small { display: block; color: var(--muted); font-size: 11px; }
.kpi b { font-size: 20px; letter-spacing: -.02em; }
.kpi em { font-style: normal; font-size: 11px; color: var(--ok); margin-left: 4px; }
.chart { display: flex; align-items: flex-end; gap: 6px; height: 96px; padding: 12px; border-radius: 12px; background: #fff; border: 1px solid var(--line); }
.chart i { flex: 1; border-radius: 6px 6px 2px 2px; background: linear-gradient(180deg, #7b3af5, #3d2ff0); opacity: .85; }
.chart i:nth-child(even) { background: linear-gradient(180deg, #1fe3f2, #3d8bf0); }

.float-card { display: flex; align-items: center; gap: 10px; white-space: nowrap; position: absolute; border-radius: 16px; background: #fff; color: var(--text); padding: 14px 16px; box-shadow: 0 24px 60px -16px rgba(10,10,40,.45); font-size: 12.5px; border: 1px solid var(--line); }
.float-card b { display: block; font-size: 13.5px; }
.float-card small { color: var(--muted); }
.float-card .fi { width: 34px; height: 34px; border-radius: 10px; background: var(--grad); color: #fff; display: grid; place-items: center; flex-shrink: 0; }
.float-card .fi svg { width: 18px; height: 18px; }
.media-wrap { position: relative; }
.media-wrap .f1 { left: -36px; bottom: 40px; animation: float 6s ease-in-out infinite; }
.media-wrap .f2 { right: -28px; top: -28px; animation: float 7s ease-in-out infinite reverse; }
@keyframes float { 50% { transform: translateY(-10px); } }

/* 简单面板示意（非窗口） */
.panel { border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); padding: 22px; font-size: 13px; }
.dark .panel { background: rgba(255,255,255,.04); border-color: var(--on-dark-line); color: var(--on-dark); box-shadow: none; }
.panel-title { font-weight: 700; font-size: 14px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.list-rows > div { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 0; border-top: 1px solid var(--line-2); }
.list-rows > div:first-child { border-top: 0; }
.dark .list-rows > div { border-color: var(--on-dark-line); }

/* 手机示意 */
.phone { width: 270px; border-radius: 40px; padding: 12px; background: #151735; box-shadow: var(--shadow-lg); margin: 0 auto; }
.phone-screen { border-radius: 30px; background: #f5f6fb; overflow: hidden; min-height: 500px; display: flex; flex-direction: column; font-size: 12.5px; }
.phone-top { padding: 16px 16px 12px; background: #fff; border-bottom: 1px solid var(--line); text-align: center; font-weight: 700; position: relative; }
.phone-top::before { content: ""; display: block; width: 80px; height: 20px; border-radius: 999px; background: #151735; margin: -6px auto 10px; }
.phone-body { padding: 14px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.phone .msg { max-width: 88%; }
.phone .msg .bubble { font-size: 12px; }
.phone .tagline { align-self: center; font-size: 10.5px; color: var(--muted); background: #e9ebf5; padding: 2px 10px; border-radius: 999px; }

/* 对比 / 表格 */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--line); background: #fff; }
table.compare { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 15px; }
.compare th, .compare td { padding: 18px 22px; text-align: left; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.compare thead th { background: var(--bg-soft); font-size: 14px; color: var(--muted); font-weight: 600; }
.compare tbody tr:last-child td { border-bottom: 0; }
.compare td:first-child { font-weight: 700; white-space: nowrap; }
.compare .yes { color: var(--ok); font-weight: 600; }

/* FAQ */
.faq { max-width: 880px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 26px 0; font-size: 18px; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 26px; font-weight: 300; color: var(--brand); transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 26px 0; color: var(--muted); line-height: 1.9; }

/* 行业 */
.industry { display: grid; grid-template-columns: 300px 1fr; gap: 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); background: #fff; }
.industry + .industry { margin-top: 24px; }
.industry-side { padding: 36px; background: var(--ink); color: #fff; position: relative; overflow: hidden; isolation: isolate; }
.industry-side::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(80% 80% at 100% 0%, rgba(123,58,245,.5), transparent 60%), radial-gradient(60% 60% at 0% 100%, rgba(31,227,242,.18), transparent 60%); }
.industry-side .card-icon { margin-bottom: 22px; }
.industry-side h3 { font-size: 24px; }
.industry-side p { margin-top: 10px; color: var(--on-dark-2); font-size: 14.5px; }
.industry-body { padding: 36px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.industry-body h4 { font-size: 14px; color: var(--brand); letter-spacing: .06em; margin-bottom: 12px; }
.industry-body li { position: relative; padding-left: 16px; font-size: 14.5px; color: var(--text-2); line-height: 1.75; }
.industry-body li + li { margin-top: 8px; }
.industry-body li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--violet); }

/* 锚点导航（子页） */
.subnav { position: sticky; top: 72px; z-index: 50; background: rgba(255,255,255,.94); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.subnav .container { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
.subnav .container::-webkit-scrollbar { display: none; }
.subnav a { flex-shrink: 0; padding: 16px 16px; font-size: 14.5px; color: var(--text-2); font-weight: 500; border-bottom: 2px solid transparent; }
.subnav a:hover, .subnav a.on { color: var(--brand); border-bottom-color: var(--brand); }
[id] { scroll-margin-top: 140px; }

/* 下载 */
.download-hero .container { gap: 0; }
.download-hero .eyebrow { margin-bottom: 24px; }
.download-hero.center .lead { margin-top: 20px; }
.download-hero h1 .grad-text { display: inline-block; }
.dl-card { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; padding: 40px; border-radius: 28px; background: #fff; color: var(--text); box-shadow: var(--shadow-lg); }
.dl-card h3 { font-size: 24px; }
.dl-card .meta { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 12px; font-size: 14px; color: var(--muted); }
.dl-card { margin-top: 48px; max-width: 820px; width: 100%; text-align: left; }
.dl-product { display: flex; gap: 20px; align-items: center; min-width: 0; }
.dl-product img { flex-shrink: 0; }
.dl-help { grid-column: 1 / -1; color: var(--text-2); font-size: 14px; }
.dl-share { margin-top: 20px; }
.dl-share label { display: block; margin-bottom: 8px; font-weight: 600; }
.dl-copy-row { display: flex; gap: 12px; }
.dl-copy-row input { flex: 1; min-width: 0; width: 100%; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg-soft); color: var(--text-2); font: inherit; font-size: 16px; }
.dl-copy-status { min-height: 24px; margin-top: 6px; }
.wechat-guide { position: relative; margin-top: 32px; padding: 28px 32px; max-width: 820px; width: 100%; text-align: left; background: var(--bg-tint); color: var(--text); border-radius: var(--radius); }
.wechat-guide h2 { padding-right: 40px; margin-bottom: 12px; font-size: 22px; }
.wechat-guide p, .wechat-guide ol { font-size: 16px; color: var(--text-2); }
.wechat-guide ol { margin: 16px 0; padding-left: 24px; }
.wechat-guide li + li { margin-top: 8px; }
.wechat-arrow { position: absolute; top: 16px; right: 16px; width: 40px; height: 40px; color: var(--brand); }
.wechat-guide[hidden], .dl-share[hidden] { display: none; }
@media (max-width: 760px) {
  .dl-product { gap: 14px; align-items: flex-start; }
  .dl-product img { width: 48px; height: 48px; }
  .dl-card h3 { font-size: 21px; }
  .dl-card .meta { display: grid; gap: 6px; }
  .dl-copy-row { flex-direction: column; }
  .wechat-guide { padding: 24px; }
}
.spec { display: grid; grid-template-columns: 140px 1fr; border-top: 1px solid var(--line); }
.spec > * { padding: 18px 0; border-bottom: 1px solid var(--line); }
.spec dt { color: var(--muted); font-size: 15px; }
.spec dd { margin: 0; font-weight: 600; font-size: 15px; }
.shot { border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--line); background: #fff; }

/* 联系 */
.contact-item { display: flex; gap: 16px; padding: 24px 0; border-top: 1px solid var(--line); }
.contact-item:first-child { border-top: 0; }
.contact-item .card-icon { width: 46px; height: 46px; border-radius: 14px; flex-shrink: 0; }
.contact-item small { display: block; color: var(--muted); font-size: 14px; }
.contact-item b { font-size: 18px; }

/* 进场动画 */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal.d1 { transition-delay: .08s; } .js .reveal.d2 { transition-delay: .16s; } .js .reveal.d3 { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav, .header-cta .text-link { display: none; }
  .header-cta { margin-left: auto; }
  .nav-toggle { display: grid; margin-left: 0; }
  .site-header.menu-open { background: #fff; }
  .site-header.menu-open .brand, .site-header.menu-open .nav-toggle { color: var(--text); }
  .site-header.menu-open .nav {
    display: flex; flex-direction: column; align-items: stretch; gap: 0; position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    background: #fff; padding: 12px 24px 40px; overflow-y: auto; border-top: 1px solid var(--line);
  }
  .site-header.menu-open .nav-link { height: auto; padding: 16px 0; color: var(--text); font-size: 17px; border-bottom: 1px solid var(--line-2); box-shadow: none; }
  .site-header.menu-open .nav-link svg { display: none; }
  .site-header.menu-open .mega { position: static; opacity: 1; visibility: visible; transform: none; width: auto; box-shadow: none; border: 0; padding: 4px 0 12px; grid-template-columns: 1fr; }
  .site-header.menu-open .mega a { padding: 10px 0; }
  .site-header.menu-open .mega-foot { display: none; }
  .hero-home .container, .page-hero .container, .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: repeat(3, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .industry { grid-template-columns: 1fr; }
  .cta-box { grid-template-columns: 1fr; padding: 56px 40px; }
  .media-wrap .f1 { left: 8px; } .media-wrap .f2 { right: 8px; }
}
@media (max-width: 760px) {
  body { font-size: 15px; }
  .container { padding: 0 16px; }
  .header-cta .btn { display: none; }
  .hero { padding: 120px 0 80px; }
  .page-hero { padding: 120px 0 64px; }
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 44px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 28px 20px; border-bottom: 1px solid var(--on-dark-line); }
  .stat:nth-child(2n) { border-right: 0; }
  .stat:nth-last-child(-n+2) { border-bottom: 0; }
  .steps, .steps.five, .steps.four, .steps.three { grid-template-columns: 1fr; gap: 32px; }
  .steps::before { display: none; }
  .step { text-align: left; display: grid; grid-template-columns: 56px 1fr; gap: 0 18px; padding: 0; }
  .step .n { margin: 0; grid-row: span 2; }
  .industry-body { grid-template-columns: 1fr; padding: 28px; }
  .industry-side { padding: 28px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .cta-box { padding: 44px 24px; border-radius: 24px; }
  .cta-band { padding-bottom: 80px; }
  .split + .split { margin-top: 80px; }
  .platforms .container { flex-direction: column; align-items: flex-start; gap: 16px; }
  .window-body { grid-template-columns: 1fr; }
  .app-side { display: none; }
  .float-card { display: none; }
  .dl-card { grid-template-columns: 1fr; padding: 28px; }
  .spec { grid-template-columns: 96px 1fr; }
  .faq summary { font-size: 16px; }
  .card { padding: 26px; }
  .kpis { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .kpi b { font-size: 16px; }
}

/* 协议等长文 */
.prose { max-width: 860px; margin: 0 auto; color: var(--text-2); line-height: 1.95; font-size: 16px; }
.prose h2 { font-size: 20px; color: var(--text); margin: 40px 0 12px; padding-top: 8px; }
.prose p { margin: 10px 0; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 10px 0; list-style: disc; }
.prose li { margin: 6px 0; }
.prose .notice { padding: 18px 22px; background: var(--bg-tint); border-left: 4px solid var(--brand); border-radius: 10px; color: var(--text); }
.prose a { color: var(--brand); }