/* ============================================================
   拓戎网络 · 前台样式
   风格对齐 www.tuoron.com：深蓝科技底 + 蓝紫渐变 + 辉光
   ============================================================ */

:root {
  --bg: #0f172a;
  --bg-deep: #0b1120;
  --panel: #1e293b;
  --panel-soft: #162032;
  --line: #334155;
  --line-soft: rgba(51, 65, 85, .55);
  --ink: #e2e8f0;
  --ink-strong: #f8fafc;
  --ink-2: #cbd5e1;
  --muted: #94a3b8;
  --dim: #64748b;
  --brand: #3b82f6;
  --brand-deep: #2563eb;
  --brand-dark: #1d4ed8;
  --violet: #9333ea;
  --violet-2: #a855f7;
  --cyan: #0891b2;
  --flame: #f97316;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 18px 50px rgba(2, 6, 23, .5);
  --glow-blue: rgba(59, 130, 246, .16);
  --glow-violet: rgba(147, 51, 234, .14);
  --font: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
}
img, svg { vertical-align: middle; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { color: var(--ink-strong); line-height: 1.28; margin: 0; font-weight: 700; }
h1 { font-size: clamp(30px, 4.6vw, 50px); letter-spacing: .01em; }
h2 { font-size: clamp(22px, 2.6vw, 30px); }
h3 { font-size: 18px; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
code {
  font-family: var(--mono);
  font-size: .92em; color: #93c5fd; background: rgba(59, 130, 246, .1);
  border: 1px solid rgba(59, 130, 246, .2); border-radius: 5px; padding: 1px 6px;
}
::selection { background: rgba(59, 130, 246, .35); }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--brand); color: #fff; padding: 8px 16px; border-radius: 8px;
}
.skip:focus { left: 12px; top: 12px; }

/* ---------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; border: 1px solid transparent;
  font-size: 14.5px; font-weight: 600; line-height: 1.2; cursor: pointer;
  transition: transform .18s, box-shadow .18s, background .18s, border-color .18s, color .18s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff; box-shadow: 0 8px 24px rgba(37, 99, 235, .35);
}
.btn-primary:hover { box-shadow: 0 10px 30px rgba(37, 99, 235, .5); transform: translateY(-1px); }
.btn-ghost {
  background: rgba(30, 41, 59, .6); color: var(--ink-2);
  border-color: var(--line-soft);
}
.btn-ghost:hover { border-color: var(--brand); color: #bfdbfe; }
.btn-outline {
  background: transparent; color: #bfdbfe; border-color: rgba(59, 130, 246, .45);
}
.btn-outline:hover { background: rgba(59, 130, 246, .1); border-color: var(--brand); }
.btn-light { background: #fff; color: #0f172a; box-shadow: 0 8px 24px rgba(0, 0, 0, .35); }
.btn-light:hover { transform: translateY(-1px); }
.btn-ghost-light { background: rgba(255, 255, 255, .08); color: #e2e8f0; border-color: rgba(255, 255, 255, .22); }
.btn-ghost-light:hover { border-color: rgba(255, 255, 255, .5); }
.btn-sm { padding: 9px 18px; font-size: 13.5px; border-radius: 9px; }
.text-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: #93c5fd; font-size: 14px; font-weight: 600; margin-top: 18px;
  transition: gap .2s, color .2s;
}
.text-link:hover { gap: 10px; color: #bfdbfe; }

/* ---------------------------------------------------------- 顶栏 + 导航 */
.topbar {
  background: var(--bg-deep);
  border-bottom: 1px solid rgba(51, 65, 85, .4);
  font-size: 12.5px; color: var(--dim);
}
.topbar-inner { display: flex; justify-content: space-between; padding-top: 7px; padding-bottom: 7px; }
.topbar-name { color: var(--muted); letter-spacing: .04em; }
.topbar-meta { letter-spacing: .02em; }

.nav {
  position: sticky; top: 0; z-index: 90;
  background: rgba(11, 17, 32, .88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(51, 65, 85, .45);
}
.nav-inner { display: flex; align-items: center; gap: 26px; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.logo-mark { display: inline-flex; }
.logo-glyph {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--flame) 0%, #dc2626 100%);
  color: #fff; font-weight: 800; font-size: 17px;
  box-shadow: 0 6px 18px rgba(249, 115, 22, .35);
}
.logo-img { height: 36px; width: auto; border-radius: 9px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 16.5px; color: var(--ink-strong); letter-spacing: .06em; }
.brand-text small { font-size: 9.5px; letter-spacing: .3em; color: var(--dim); text-transform: uppercase; }
.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-link {
  padding: 8px 14px; border-radius: 8px; font-size: 14px; color: var(--muted);
  transition: color .18s, background .18s;
}
.nav-link:hover { color: var(--ink-strong); background: rgba(51, 65, 85, .35); }
.nav-link.is-active { color: #93c5fd; background: rgba(59, 130, 246, .12); }
.nav-cta { margin-left: 6px; }
.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line-soft);
  border-radius: 9px; background: rgba(30, 41, 59, .6); cursor: pointer; padding: 0;
}
.nav-toggle span { display: block; width: 17px; height: 2px; background: var(--ink-2); margin: 4px auto; border-radius: 2px; }
.nav-mobile { display: none; padding: 10px 28px 18px; border-top: 1px solid var(--line-soft); }
.nav-mobile .nav-link { display: block; padding: 11px 12px; }

/* ---------------------------------------------------------- 首页 Hero */
.hero {
  position: relative; overflow: hidden;
  padding: 104px 0 96px;
  background:
    radial-gradient(760px 420px at 18% -10%, var(--glow-blue), transparent 70%),
    radial-gradient(680px 400px at 85% 8%, var(--glow-violet), transparent 70%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
  border-bottom: 1px solid rgba(51, 65, 85, .35);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .22em;
  color: #93c5fd; text-transform: uppercase; margin-bottom: 20px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--violet-2));
}
.hero-copy h1 {
  background: linear-gradient(100deg, #f8fafc 30%, #bfdbfe 75%, #c4b5fd);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin-top: 22px; font-size: 16.5px; color: var(--muted); max-width: 520px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-meta { display: flex; gap: 38px; margin-top: 46px; padding-top: 28px; border-top: 1px solid var(--line-soft); }
.hero-meta strong { display: block; font-size: 21px; color: var(--ink-strong); }
.hero-meta span { font-size: 12.5px; color: var(--dim); }

.hero-visual { display: flex; flex-direction: column; gap: 20px; }
.geo-note { display: flex; gap: 12px; align-items: flex-start; }
.geo-note-line { width: 3px; align-self: stretch; border-radius: 2px; background: linear-gradient(180deg, var(--brand), var(--violet-2)); flex: none; }
.geo-note p { font-size: 13.5px; color: var(--muted); line-height: 1.9; }

/* AI 摘要卡（GEO 展示） */
.ai-card {
  background: linear-gradient(160deg, rgba(30, 41, 59, .9), rgba(15, 23, 42, .9));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow), 0 0 0 1px rgba(59, 130, 246, .06) inset;
  padding: 22px 24px;
  position: relative; overflow: hidden;
}
.ai-card::before {
  content: ""; position: absolute; top: -70px; right: -70px; width: 190px; height: 190px;
  background: radial-gradient(circle, rgba(147, 51, 234, .25), transparent 70%);
  pointer-events: none;
}
.ai-card-head { display: flex; align-items: center; gap: 9px; font-size: 12.5px; color: var(--muted); letter-spacing: .08em; }
.ai-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px rgba(52, 211, 153, .8); }
.ai-tag {
  margin-left: auto; font-size: 10.5px; font-weight: 700; letter-spacing: .12em;
  color: #c4b5fd; background: rgba(147, 51, 234, .16); border: 1px solid rgba(147, 51, 234, .3);
  padding: 2px 9px; border-radius: 99px;
}
.ai-query {
  margin-top: 16px; font-size: 13.5px; color: var(--ink-2);
  background: rgba(15, 23, 42, .75); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 11px 14px;
}
.ai-answer { margin-top: 12px; font-size: 13.5px; color: var(--muted); line-height: 1.85; }
.ai-source {
  display: flex; align-items: center; gap: 9px; margin-top: 14px;
  font-size: 12.5px; color: #93c5fd;
  background: rgba(59, 130, 246, .09); border: 1px solid rgba(59, 130, 246, .22);
  border-radius: 9px; padding: 8px 12px; width: fit-content;
}
.ai-source-idx {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; border-radius: 5px; background: var(--brand-deep); color: #fff;
  font-size: 11px; font-weight: 700;
}
.ai-source-ok { margin-left: auto; color: var(--ok); font-size: 11.5px; }
.ai-card-foot { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 16px; }
.ai-card-foot span {
  font-size: 11px; color: var(--dim); border: 1px solid var(--line-soft);
  padding: 3px 10px; border-radius: 99px; background: rgba(30, 41, 59, .5);
}

/* ---------------------------------------------------------- 通用区块 */
.section { padding: 92px 0; }
.section + .section { padding-top: 0; }
.section-facts { padding-top: 84px; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 44px; }
.section-lead { font-size: 14.5px; color: var(--muted); max-width: 420px; text-align: right; }
.kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .18em; color: #93c5fd;
}
.kicker-dot {
  width: 8px; height: 8px; border-radius: 3px; flex: none;
  background: linear-gradient(135deg, var(--brand), var(--violet-2));
  box-shadow: 0 0 12px rgba(59, 130, 246, .6);
}
.kicker-light { color: #93c5fd; }
.facts-intro h2, .faq-intro h2, .section-head h2, .about-copy h2 { margin-top: 12px; }

/* 事实区 */
.facts-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: start; }
.facts-panel {
  background: linear-gradient(165deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .9));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 30px 32px; box-shadow: var(--shadow);
}
.ai-summary {
  font-size: 15px; color: var(--ink-2); line-height: 1.9;
  padding-bottom: 22px; border-bottom: 1px dashed var(--line-soft);
}
.fact-list { display: grid; margin-top: 6px; }
.fact-row {
  display: flex; justify-content: space-between; gap: 24px;
  padding: 13px 2px; border-bottom: 1px solid rgba(51, 65, 85, .35); font-size: 14px;
}
.fact-row:last-child { border-bottom: none; }
.fact-row dt { color: var(--dim); flex: none; }
.fact-row dd { color: var(--ink-2); text-align: right; }

/* ---------------------------------------------------------- 产品卡 */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.product-grid-page { grid-template-columns: repeat(2, 1fr); }
.product-card {
  --card-accent: var(--brand);
  display: flex; flex-direction: column;
  background: linear-gradient(170deg, rgba(30, 41, 59, .85), rgba(15, 23, 42, .92));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 30px 30px 26px;
  transition: transform .22s, border-color .22s, box-shadow .22s;
  position: relative; overflow: hidden;
}
.product-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--card-accent), transparent 80%);
  opacity: .8;
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--card-accent) 55%, transparent);
  box-shadow: 0 22px 48px rgba(2, 6, 23, .55), 0 0 34px color-mix(in srgb, var(--card-accent) 16%, transparent);
}
.product-top { display: flex; justify-content: space-between; align-items: center; }
.product-idx { font-size: 12px; font-weight: 700; letter-spacing: .14em; color: var(--dim); }
.product-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 12px; color: #fff;
  background: linear-gradient(135deg, var(--card-accent), color-mix(in srgb, var(--card-accent) 55%, var(--violet)));
  box-shadow: 0 8px 22px color-mix(in srgb, var(--card-accent) 38%, transparent);
}
.product-card h3 { margin-top: 20px; font-size: 19px; }
.product-card h3 a:hover { color: #93c5fd; }
.product-en {
  font-size: 10.5px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--dim); margin-top: 5px;
}
.product-tagline {
  margin-top: 14px; font-size: 14px; font-weight: 600;
  color: color-mix(in srgb, var(--card-accent) 72%, #fff);
}
.product-summary { margin-top: 9px; font-size: 13.5px; line-height: 1.8; color: var(--muted); flex: 1; }
.product-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.product-tags span {
  font-size: 11.5px; color: var(--ink-2); background: rgba(30, 41, 59, .7);
  border: 1px solid var(--line-soft); padding: 3px 10px; border-radius: 99px;
}
.product-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line-soft); }
.card-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; padding: 8px 15px; border-radius: 8px;
  color: var(--ink-2); border: 1px solid var(--line-soft); background: rgba(15, 23, 42, .5);
  transition: border-color .18s, color .18s, background .18s;
}
.card-btn:hover { border-color: color-mix(in srgb, var(--card-accent) 60%, transparent); color: #fff; }
.card-btn-fill {
  background: linear-gradient(135deg, var(--card-accent), color-mix(in srgb, var(--card-accent) 70%, var(--brand-dark)));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--card-accent) 32%, transparent);
}
.card-btn-fill:hover { color: #fff; filter: brightness(1.08); }
.product-more {
  margin-left: auto; display: inline-flex; align-items: center; gap: 5px;
  font-size: 13px; color: var(--dim); transition: color .18s;
}
.product-more:hover { color: #93c5fd; }

/* ---------------------------------------------------------- 能力区 */
.section-ability { background: var(--bg-deep); border-block: 1px solid rgba(51, 65, 85, .35); }
.ability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ability {
  background: linear-gradient(170deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .9));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 30px 28px; transition: transform .22s, border-color .22s;
}
.ability:hover { transform: translateY(-4px); border-color: rgba(59, 130, 246, .45); }
.ability-no {
  display: inline-flex; font-size: 12px; font-weight: 800; letter-spacing: .16em;
  color: #93c5fd; background: rgba(59, 130, 246, .12); border: 1px solid rgba(59, 130, 246, .28);
  padding: 4px 11px; border-radius: 99px;
}
.ability h3 { margin-top: 18px; }
.ability p { margin-top: 11px; font-size: 13.5px; color: var(--muted); line-height: 1.85; }
.ability ul { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.ability ul li {
  font-size: 11.5px; color: var(--ink-2); background: rgba(30, 41, 59, .7);
  border: 1px solid var(--line-soft); padding: 3px 10px; border-radius: 99px;
}

/* ---------------------------------------------------------- 关于区 */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: start; }
.about-copy p { margin-top: 16px; color: var(--muted); font-size: 14.5px; }
.about-copy h2 { margin-bottom: 8px; }
.about-side { display: flex; flex-direction: column; gap: 18px; }
.about-badge {
  background: linear-gradient(150deg, rgba(59, 130, 246, .16), rgba(147, 51, 234, .12));
  border: 1px solid rgba(59, 130, 246, .3); border-radius: var(--radius);
  padding: 26px 28px;
}
.about-badge-label { font-size: 12px; letter-spacing: .2em; color: #93c5fd; display: block; }
.about-badge strong { display: block; font-size: 21px; margin-top: 8px; color: var(--ink-strong); }
.about-badge-sub { display: block; margin-top: 5px; font-size: 12.5px; color: var(--dim); }
.about-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  background: linear-gradient(170deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .9));
  border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 22px;
}
.about-stats > div { text-align: center; }
.about-stats strong { display: block; font-size: 21px; color: var(--ink-strong); }
.about-stats span { font-size: 12px; color: var(--dim); }

/* ---------------------------------------------------------- FAQ */
.faq-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: start; }
.faq-list, .faq-group { display: flex; flex-direction: column; gap: 12px; }
.faq-cat { font-size: 15px; color: #93c5fd; margin: 26px 0 4px; letter-spacing: .06em; }
.faq-group:first-child .faq-cat { margin-top: 0; }
.faq-item {
  background: linear-gradient(170deg, rgba(30, 41, 59, .75), rgba(15, 23, 42, .88));
  border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  overflow: hidden; transition: border-color .2s;
}
.faq-item[open] { border-color: rgba(59, 130, 246, .4); }
.faq-item:hover { border-color: rgba(59, 130, 246, .32); }
/* /faq 页默认全部展开，此时不应逐条高亮（否则满屏蓝框失去层次），改为悬停提示 */
.faq-page-main .faq-item[open] { border-color: var(--line-soft); }
.faq-page-main .faq-item[open]:hover { border-color: rgba(59, 130, 246, .35); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 17px 20px; cursor: pointer; list-style: none;
  font-size: 14.5px; font-weight: 600; color: var(--ink-2);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--ink-strong); }
.faq-icon { position: relative; width: 16px; height: 16px; flex: none; }
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 12px; height: 2px; border-radius: 2px; background: #93c5fd;
  transition: transform .2s;
}
.faq-icon::after { transform: rotate(90deg); }
.faq-item[open] .faq-icon::after { transform: rotate(0); }
.faq-a { padding: 0 20px 18px; font-size: 13.5px; color: var(--muted); line-height: 1.85; }

/* ---------------------------------------------------------- CTA */
.cta {
  padding: 88px 0;
  background:
    radial-gradient(640px 300px at 22% 20%, rgba(59, 130, 246, .18), transparent 70%),
    radial-gradient(560px 300px at 80% 90%, rgba(147, 51, 234, .16), transparent 70%),
    var(--bg-deep);
  border-top: 1px solid rgba(51, 65, 85, .4);
}
.cta-slim { padding: 64px 0; }
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 44px; }
.cta h2 { margin-top: 12px; }
.cta p { margin-top: 12px; color: var(--muted); }
.cta-actions { display: flex; gap: 14px; flex: none; }

/* ---------------------------------------------------------- 内页 hero */
.page-hero {
  position: relative; overflow: hidden;
  padding: 84px 0 72px;
  background:
    radial-gradient(680px 340px at 25% -20%, var(--glow-blue), transparent 70%),
    radial-gradient(560px 300px at 85% 0%, var(--glow-violet), transparent 70%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
  border-bottom: 1px solid rgba(51, 65, 85, .35);
}
.page-hero h1 { max-width: 720px; }
.page-sub { margin-top: 20px; font-size: 15.5px; color: var(--muted); max-width: 640px; }
.page-hero .eyebrow { margin-bottom: 16px; }

/* ---------------------------------------------------------- 详情页 */
.detail-hero {
  position: relative; overflow: hidden;
  padding: 72px 0 60px;
  background:
    radial-gradient(700px 320px at 20% -10%, color-mix(in srgb, var(--card-accent, var(--brand)) 16%, transparent), transparent 70%),
    radial-gradient(520px 280px at 88% 0%, var(--glow-violet), transparent 70%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
  border-bottom: 1px solid rgba(51, 65, 85, .35);
}
.crumb { font-size: 13px; color: var(--dim); display: flex; gap: 9px; }
.crumb a:hover { color: #93c5fd; }
.crumb em { font-style: normal; color: var(--ink-2); }
.detail-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 44px; margin-top: 34px; }
.detail-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: .1em; color: #c4b5fd;
  background: rgba(147, 51, 234, .14); border: 1px solid rgba(147, 51, 234, .3);
  padding: 5px 13px; border-radius: 99px;
}
.detail-hero h1 { margin-top: 18px; font-size: clamp(28px, 3.6vw, 42px); }
.detail-en { font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--dim); margin-top: 8px; }
.detail-tagline { margin-top: 14px; font-size: 16px; color: #93c5fd; font-weight: 600; }
.detail-cta { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; flex: none; }
.detail-ext { font-size: 12.5px; color: var(--dim); max-width: 300px; text-align: right; }
.detail-summary { margin-top: 26px; font-size: 15px; color: var(--ink-2); max-width: 760px; }
.detail-tags { margin-top: 18px; }

.detail-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 56px; align-items: start; }
.detail-main h2 { font-size: 21px; margin: 34px 0 14px; }
.detail-main h2:first-child { margin-top: 0; }
.detail-main p { color: var(--muted); font-size: 14.5px; margin-bottom: 14px; }
.feature-list { display: grid; gap: 11px; }
.feature-list li {
  display: flex; gap: 11px; align-items: flex-start;
  font-size: 14px; color: var(--ink-2);
}
.feature-list li svg { color: var(--ok); flex: none; margin-top: 3px; }
.detail-side { display: flex; flex-direction: column; gap: 18px; position: sticky; top: 92px; }

.side-card {
  background: linear-gradient(170deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .92));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 26px 26px 24px;
}
.side-card h3 { font-size: 15.5px; }
.side-card p { margin-top: 10px; font-size: 13.5px; color: var(--muted); }
.side-card .btn { margin-top: 16px; }
.side-card-dark {
  background: linear-gradient(150deg, rgba(59, 130, 246, .16), rgba(147, 51, 234, .12));
  border-color: rgba(59, 130, 246, .32);
}
.scenario-list { display: grid; margin-top: 8px; }
.scenario-list li {
  padding: 11px 2px; border-bottom: 1px solid rgba(51, 65, 85, .35);
  font-size: 13.5px; color: var(--ink-2);
}
.scenario-list li:last-child { border-bottom: none; }
.small { font-size: 13px; }
.muted { color: var(--dim); }

/* ---------------------------------------------------------- 关于页 */
.about-story { display: grid; grid-template-columns: 1.25fr .75fr; gap: 56px; align-items: start; }
.story-main h2 { font-size: 21px; margin: 36px 0 14px; }
.story-main h2:first-child { margin-top: 0; }
.story-main p { color: var(--muted); font-size: 14.5px; margin-bottom: 14px; }
.story-main strong { color: var(--ink-strong); }
.about-products { display: grid; margin-top: 6px; }
.about-products li {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  padding: 13px 2px; border-bottom: 1px solid rgba(51, 65, 85, .35);
}
.about-products li:last-child { border-bottom: none; }
.about-products a { color: #93c5fd; font-weight: 600; font-size: 14.5px; }
.about-products a:hover { color: #bfdbfe; }
.about-products span { font-size: 12.5px; color: var(--dim); text-align: right; }
.story-side { display: flex; flex-direction: column; gap: 18px; position: sticky; top: 92px; }
.ability-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ability-tags li {
  font-size: 12px; color: var(--ink-2); background: rgba(59, 130, 246, .08);
  border: 1px solid rgba(59, 130, 246, .22); padding: 4px 11px; border-radius: 99px;
}

/* GEO 网格（关于页） */
.section-geo { background: var(--bg-deep); border-top: 1px solid rgba(51, 65, 85, .35); }
.geo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.geo-item {
  background: linear-gradient(170deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .9));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 26px 24px; transition: border-color .2s, transform .2s;
}
.geo-item:hover { border-color: rgba(147, 51, 234, .45); transform: translateY(-3px); }
.geo-item span {
  display: inline-flex; font-size: 12px; font-weight: 800; letter-spacing: .14em;
  color: #c4b5fd; background: rgba(147, 51, 234, .12); border: 1px solid rgba(147, 51, 234, .28);
  padding: 3px 10px; border-radius: 99px;
}
.geo-item h3 { margin-top: 15px; font-size: 15.5px; }
.geo-item p { margin-top: 9px; font-size: 13px; color: var(--muted); line-height: 1.8; }

/* ---------------------------------------------------------- FAQ 页 */
.faq-page-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: start; }
.faq-page-side { display: flex; flex-direction: column; gap: 18px; position: sticky; top: 92px; }
.doc-links { display: grid; gap: 8px; margin-top: 12px; }
.doc-links a {
  display: inline-flex; font-size: 13px; color: #93c5fd;
  background: rgba(59, 130, 246, .08); border: 1px solid rgba(59, 130, 246, .22);
  padding: 7px 13px; border-radius: 8px; width: fit-content;
}
.doc-links a:hover { background: rgba(59, 130, 246, .16); }
.empty { color: var(--dim); }

/* ---------------------------------------------------------- 联系页 */
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: start; }
.contact-form {
  background: linear-gradient(170deg, rgba(30, 41, 59, .8), rgba(15, 23, 42, .92));
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 34px 34px 30px; box-shadow: var(--shadow);
}
.field { display: block; margin-bottom: 18px; }
.field span { display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 8px; }
.field input, .field textarea {
  width: 100%; background: rgba(15, 23, 42, .75);
  border: 1px solid var(--line-soft); border-radius: 10px;
  color: var(--ink); font: inherit; font-size: 14px;
  padding: 12px 14px; transition: border-color .18s, box-shadow .18s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--dim); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .18);
}
.field textarea { resize: vertical; min-height: 130px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-foot { display: flex; align-items: center; gap: 20px; margin-top: 6px; }
.form-tip { font-size: 12.5px; color: var(--dim); }
.alert { border-radius: 10px; padding: 13px 17px; font-size: 14px; margin-bottom: 18px; }
.alert-ok {
  color: #6ee7b7; background: rgba(52, 211, 153, .1);
  border: 1px solid rgba(52, 211, 153, .3);
}
.contact-side { display: flex; flex-direction: column; gap: 18px; }
.contact-list { display: grid; }
.contact-list li {
  display: flex; gap: 16px; padding: 11px 2px;
  border-bottom: 1px solid rgba(51, 65, 85, .35); font-size: 13.5px;
}
.contact-list li:last-child { border-bottom: none; }
.contact-list span { color: var(--dim); flex: none; width: 42px; }
.contact-list a { color: #93c5fd; }
.contact-list a:hover { color: #bfdbfe; }
.contact-list em { font-style: normal; color: var(--ink-2); }

/* ---------------------------------------------------------- 页脚 */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(51, 65, 85, .45);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px; padding-bottom: 44px;
}
.footer-brand p { margin-top: 18px; font-size: 13.5px; color: var(--muted); max-width: 320px; }
.footer-ai {
  font-size: 12px !important; color: var(--dim) !important;
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--line-soft); border-radius: 99px; padding: 5px 13px;
}
.brand-footer .brand-text strong { font-size: 15.5px; }
.footer-col h4 {
  font-size: 13px; letter-spacing: .16em; color: var(--ink-2);
  text-transform: uppercase; margin-bottom: 18px;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { font-size: 13.5px; color: var(--muted); transition: color .18s; }
.footer-col a:hover { color: #93c5fd; }
.footer-contact li { font-size: 13.5px; color: var(--muted); display: flex; gap: 10px; }
.footer-contact span { color: var(--dim); flex: none; }
.footer-contact em { font-style: normal; color: var(--ink-2); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  border-top: 1px solid rgba(51, 65, 85, .4); padding-top: 22px; padding-bottom: 26px;
  font-size: 12.5px; color: var(--dim);
}
.footer-legal { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-legal a { color: var(--dim); }
.footer-legal a:hover { color: #93c5fd; }

/* ---------------------------------------------------------- 首页联系区（#contact） */
.section-contact {
  background:
    radial-gradient(620px 320px at 18% 10%, rgba(59, 130, 246, .14), transparent 70%),
    radial-gradient(560px 300px at 86% 90%, rgba(147, 51, 234, .12), transparent 70%),
    var(--bg-deep);
  border-top: 1px solid rgba(51, 65, 85, .4);
}
.contact-head { margin-bottom: 40px; }
.contact-home-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 56px; align-items: start; }
.contact-home-info { display: flex; flex-direction: column; gap: 30px; }
.contact-list-lg { display: grid; gap: 2px; }
.contact-list-lg li {
  display: flex; align-items: center; gap: 13px;
  padding: 13px 2px; border-bottom: 1px solid rgba(51, 65, 85, .35);
  font-size: 14.5px; color: var(--ink-2);
}
.contact-list-lg li:last-child { border-bottom: none; }
.contact-list-lg a { color: #93c5fd; }
.contact-list-lg a:hover { color: #bfdbfe; }
.contact-list-lg em { font-style: normal; }
.contact-ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  color: #93c5fd; background: rgba(59, 130, 246, .1);
  border: 1px solid rgba(59, 130, 246, .22);
}
.trust-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 26px; }
.trust-list > div { position: relative; padding-left: 0; }
.trust-list span {
  display: inline-flex; font-size: 11px; font-weight: 800; letter-spacing: .14em;
  color: #c4b5fd; background: rgba(147, 51, 234, .12); border: 1px solid rgba(147, 51, 234, .28);
  padding: 2px 9px; border-radius: 99px;
}
.trust-list h3 { margin-top: 10px; font-size: 15px; }
.trust-list p { margin-top: 6px; font-size: 13px; color: var(--muted); line-height: 1.75; }
.contact-home-form .contact-form { padding: 30px 30px 26px; }
.contact-form-head { display: flex; align-items: center; gap: 13px; margin-bottom: 22px; }
.contact-form-ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 11px; flex: none; color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--violet));
  box-shadow: 0 8px 22px rgba(59, 130, 246, .3);
}
.contact-form-head h3 { font-size: 17px; }
.contact-form-head p { margin-top: 3px; font-size: 12.5px; color: var(--dim); }
.field select {
  width: 100%; background: rgba(15, 23, 42, .75);
  border: 1px solid var(--line-soft); border-radius: 10px;
  color: var(--ink); font: inherit; font-size: 14px;
  padding: 12px 14px; transition: border-color .18s, box-shadow .18s;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, #94a3b8 50%), linear-gradient(135deg, #94a3b8 50%, transparent 50%);
  background-position: calc(100% - 19px) 21px, calc(100% - 14px) 21px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
.field select:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .18);
}
.field select option { background: #0f172a; color: var(--ink); }
.btn-block { width: 100%; justify-content: center; margin-top: 4px; }

/* ---------------------------------------------------------- 响应式 */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 52px; }
  .hero-visual { max-width: 560px; }
  .facts-grid, .about-grid, .faq-grid { grid-template-columns: 1fr; gap: 44px; }
  .section-lead { text-align: left; }
  .detail-grid, .about-story, .faq-page-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .contact-home-grid { grid-template-columns: 1fr; gap: 40px; }
  .detail-side, .story-side, .faq-page-side { position: static; }
  .product-grid, .product-grid-page { grid-template-columns: 1fr 1fr; }
  .ability-grid { grid-template-columns: 1fr; }
  .geo-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 14px; }
}
@media (max-width: 760px) {
  .wrap { padding: 0 20px; }
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav-mobile[data-open="true"] { display: block; }
  .topbar-meta { display: none; }
  .hero { padding: 64px 0 60px; }
  .hero-meta { flex-wrap: wrap; gap: 22px; }
  .product-grid, .product-grid-page { grid-template-columns: 1fr; }
  .geo-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .detail-head { flex-direction: column; align-items: flex-start; }
  .detail-cta { align-items: flex-start; }
  .detail-ext { text-align: left; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .trust-list { grid-template-columns: 1fr; gap: 16px; }
  .section { padding: 64px 0; }
  .about-stats { grid-template-columns: repeat(3, 1fr); padding: 16px; }
  .contact-form { padding: 24px 20px; }
}

/* ---------------------------------------------------------- 文章 */
.wrap-narrow { max-width: 860px; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.article-card {
  background: linear-gradient(170deg, rgba(30, 41, 59, .75), rgba(15, 23, 42, .88));
  border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  transition: border-color .2s, transform .2s;
}
.article-card:hover { border-color: rgba(59, 130, 246, .45); transform: translateY(-2px); }
.article-card-link { display: flex; flex-direction: column; gap: 10px; padding: 22px 22px 18px; color: inherit; }
.article-meta { display: flex; align-items: center; gap: 12px; font-size: 12.5px; color: var(--dim); }
.article-cat {
  padding: 3px 10px; border-radius: 999px; font-size: 12px;
  color: #93c5fd; background: rgba(59, 130, 246, .12); border: 1px solid rgba(59, 130, 246, .3);
}
.article-title { font-size: 16.5px; font-weight: 700; color: var(--ink-strong); line-height: 1.5; margin: 0; }
.article-summary {
  font-size: 13.5px; color: var(--muted); line-height: 1.8; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.article-more { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: #93c5fd; margin-top: 2px; }
.page-hero-article .article-meta-hero { margin-bottom: 14px; }
.article-body { font-size: 15px; color: var(--ink-2); line-height: 2; }
.article-body p { margin: 0 0 18px; }
.article-body p:first-child { font-size: 15.5px; color: var(--ink); }
.article-foot { margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line-soft); }
.section-articles .section-head { margin-bottom: 26px; }

@media (max-width: 980px) {
  .article-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .article-grid { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------- 服务 */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-card {
  background: linear-gradient(170deg, rgba(30, 41, 59, .75), rgba(15, 23, 42, .88));
  border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  padding: 28px 26px; color: var(--brand); display: flex; flex-direction: column; gap: 14px;
  transition: border-color .2s;
}
.service-card:hover { border-color: rgba(59, 130, 246, .45); }
.service-head { display: flex; align-items: center; justify-content: space-between; }
.service-no { font-size: 13px; letter-spacing: .1em; color: var(--dim); }
.service-card h3 { margin: 0; font-size: 19px; color: var(--ink-strong); }
.service-summary { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.85; }
.service-list { list-style: none; margin: 6px 0 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.service-list li { display: flex; gap: 9px; align-items: flex-start; font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.service-list li svg { flex: none; margin-top: 4px; }
.service-cta {
  margin-top: 34px; padding: 26px 30px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft); background: var(--panel-soft);
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}
.service-cta p { margin: 0; color: var(--ink-2); font-size: 14.5px; }

@media (max-width: 980px) {
  .service-grid { grid-template-columns: 1fr; }
}