/* ==========================================================================
   厘豆GEO 官网设计系统 v3.0 —「深空星群 · 玻璃拟态」
   参考 stylekit 营销场景：Glassmorphism × Modern Gradient × Fullscreen Hero
   深空底 #050B1E ｜ 星蓝 #5A97F4 ｜ 星紫 #8B7CFF ｜ 星青 #2FD8CB
   全站固定粒子星空背景（#cosmicBg，由 lidou-field.js 注入）
   ========================================================================== */

:root {
  /* 品牌色阶（深色适配：主操作色提亮） */
  --c-primary-50: rgba(90, 151, 244, .12);
  --c-primary-100: rgba(90, 151, 244, .20);
  --c-primary-200: rgba(90, 151, 244, .32);
  --c-primary-300: #8CBCFB;
  --c-primary-400: #6FA8FF;
  --c-primary-500: #5A97F4;
  --c-primary-600: #3E8BFF;
  --c-primary-700: #1E63D0;

  --c-accent-50: rgba(139, 124, 255, .12);
  --c-accent-100: rgba(139, 124, 255, .22);
  --c-accent-200: #B9AFFF;
  --c-accent-500: #8B7CFF;
  --c-accent-600: #A79BFF;

  --c-teal-500: #2FD8CB;
  --c-teal-50: rgba(47, 216, 203, .12);

  /* 深空文字 */
  --c-ink-900: #EAF1FD;
  --c-ink-700: #C3CFE4;
  --c-ink-500: #9FB0CF;
  --c-ink-400: #66759A;

  /* 玻璃拟态表面 */
  --c-glass: rgba(148, 178, 255, .055);
  --c-glass-2: rgba(148, 178, 255, .09);
  --c-line: rgba(148, 178, 255, .13);
  --c-line-2: rgba(148, 178, 255, .26);
  --c-bg: #04081A;
  --c-bg-soft: rgba(148, 178, 255, .035);
  --c-white: #FFFFFF;

  --c-success: #34D399;
  --c-danger: #F87171;
  --c-warn-bg: rgba(245, 200, 120, .07);
  --c-warn-line: rgba(245, 200, 120, .28);
  --c-warn-ink: #F0CE8E;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(2, 8, 26, .35);
  --shadow-md: 0 10px 30px rgba(2, 8, 26, .5);
  --shadow-lg: 0 22px 56px rgba(2, 8, 26, .6);
  --shadow-primary: 0 8px 28px rgba(62, 139, 255, .38);

  --grad-brand: linear-gradient(120deg, #7DD3FC 0%, #5A97F4 45%, #8B7CFF 100%);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink-700);
  /* 深空星云底：三层星云辉光 + 纵深渐变，fixed 不随滚动 */
  background:
    radial-gradient(1100px 700px at 86% -8%, rgba(139, 124, 255, .15), transparent 62%),
    radial-gradient(1050px 680px at -8% 18%, rgba(30, 99, 208, .20), transparent 64%),
    radial-gradient(960px 720px at 52% 112%, rgba(18, 181, 169, .09), transparent 62%),
    linear-gradient(180deg, #050C22 0%, #04081A 55%, #03061A 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

/* 全局星空画布（lidou-field.js 自动注入），负层级置于内容之下、底色之上 */
#cosmicBg {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: -1; pointer-events: none;
}

img { max-width: 100%; display: block; }
a { color: var(--c-primary-400); text-decoration: none; }
a:hover { color: var(--c-primary-300); }
ul, ol { list-style: none; }

h1, h2, h3, h4 { color: var(--c-ink-900); font-weight: 700; line-height: 1.32; }

::selection { background: rgba(90, 151, 244, .35); color: #fff; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 12px; font-size: 15.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all .25s ease;
  font-family: inherit; line-height: 1.4;
}
.btn-primary {
  background: linear-gradient(135deg, #35C3F3, #3E8BFF 55%, #6D5AE6);
  color: #fff; box-shadow: var(--shadow-primary);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 14px 36px rgba(62, 139, 255, .5); }
.btn-outline {
  background: rgba(90, 151, 244, .08); border-color: var(--c-line-2); color: #9CC2FF;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.btn-outline:hover { border-color: var(--c-primary-400); background: rgba(90, 151, 244, .16); color: #C4DAFF; transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.10); border-color: rgba(255,255,255,.28); color: #fff; backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255,255,255,.18); color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 10px; }
.btn-lg { padding: 14px 32px; font-size: 16.5px; }

/* ---------- 徽章 / 标签 ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  background: var(--c-primary-50); color: #9CC2FF; border: 1px solid var(--c-line);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-primary-400); animation: pulse 2s infinite; box-shadow: 0 0 8px var(--c-primary-400); }
.pill-accent { background: var(--c-accent-50); color: var(--c-accent-600); border-color: var(--c-accent-100); }
.pill-teal { background: var(--c-teal-50); color: var(--c-teal-500); border-color: rgba(47, 216, 203, .22); }
.tag {
  display: inline-block; padding: 3px 12px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; background: var(--c-primary-50); color: #9CC2FF;
}
.tag-line { border: 1px solid var(--c-line-2); background: transparent; }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------- 顶部导航（深色玻璃） ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5, 10, 26, .72); backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid rgba(148, 178, 255, .10);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 0 16px rgba(62, 139, 255, .35); }
.brand-name { font-size: 19px; font-weight: 800; color: var(--c-ink-900); letter-spacing: .5px; }
.brand-name em { font-style: normal; background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; align-items: center; gap: 2px; flex-wrap: nowrap; }
.site-nav a {
  display: block; padding: 8px 10px; font-size: 14px; font-weight: 500;
  color: #B9C6DE; border-radius: 8px; transition: all .2s; position: relative;
  white-space: nowrap;
}
.site-nav a:hover { color: #C4DAFF; background: rgba(90, 151, 244, .10); }
.site-nav a[aria-current="page"] { color: #8FB8FF; font-weight: 700; }
.site-nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 2px;
  height: 2.5px; border-radius: 2px; background: var(--grad-brand);
  box-shadow: 0 0 8px rgba(90, 151, 244, .8);
}
.nav-cta { flex-shrink: 0; }

.nav-toggle {
  display: none; margin-left: auto; width: 42px; height: 42px; border: 1px solid var(--c-line);
  background: rgba(148, 178, 255, .06); border-radius: 10px; cursor: pointer; flex-direction: column;
  align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--c-ink-900); border-radius: 2px; transition: all .25s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero（全屏深空 + 粒子星群） ---------- */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(148, 178, 255, .14) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 78%);
}
/* 厘豆星流：全幅粒子背景画布（lidou-field.js 驱动，覆盖整个 Hero） */
#heroFlow { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
/* Hero 底部渐隐：星流自然融入后续内容 */
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 110px;
  background: linear-gradient(180deg, rgba(4, 8, 26, 0), rgba(4, 8, 26, .88));
  pointer-events: none; z-index: 1;
}

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; padding: 96px 0 84px; }
.hero h1 { font-size: 48px; letter-spacing: -0.5px; margin: 18px 0 20px; color: #F2F6FF; }
.hero h1 .grad {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: 17px; color: var(--c-ink-500); max-width: 560px; margin-bottom: 30px; }
.hero-sub strong { color: var(--c-ink-900); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }

.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat-card {
  background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-line); border-radius: 14px; padding: 16px 14px; text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-num { font-size: 24px; font-weight: 800; color: #6FA8FF; line-height: 1.2; }
.stat-card:nth-child(2) .stat-num { color: var(--c-accent-500); }
.stat-card:nth-child(3) .stat-num { color: var(--c-teal-500); }
.stat-label { font-size: 12.5px; color: var(--c-ink-500); margin-top: 4px; }

.hero-visual { position: relative; align-self: stretch; min-height: 200px; }

.float-chip {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: rgba(10, 20, 44, .82); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--c-line-2); border-radius: 14px; padding: 10px 16px;
  box-shadow: var(--shadow-md); font-size: 13.5px; font-weight: 600; color: var(--c-ink-900);
  animation: floaty 6s ease-in-out infinite;
}
.float-chip .ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 17px; }
.float-chip small { display: block; font-size: 11.5px; color: var(--c-ink-500); font-weight: 500; }
.chip-a { top: 26px; left: -26px; }
.chip-a .ic { background: var(--c-primary-50); }
.chip-b { bottom: 44px; right: -18px; animation-delay: 1.6s; }
.chip-b .ic { background: var(--c-teal-50); }
.chip-c { bottom: -18px; left: 34px; animation-delay: 3s; }
.chip-c .ic { background: var(--c-accent-50); }

@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* 平台带 */
.platform-band { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.platform-band .pb-label { font-size: 13.5px; color: var(--c-ink-500); margin-right: 4px; }
.pb-item {
  display: inline-flex; align-items: center; gap: 7px; padding: 7px 16px;
  background: var(--c-glass); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--c-line); border-radius: 999px;
  font-size: 13.5px; font-weight: 600; color: var(--c-ink-700); box-shadow: var(--shadow-sm);
}
.pb-item i { width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, #35C3F3, #8B7CFF); box-shadow: 0 0 6px rgba(90, 151, 244, .8); }

/* ---------- 区块通用（透明化，让星空透出） ---------- */
.section { padding: 88px 0; }
.section-white { background: transparent; }
.section-soft { background: var(--c-bg-soft); position: relative; }
/* 星座分隔线：渐变光线 + 中央星点（呼应 Hero 星流） */
.section-soft::before, .section-soft::after {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  width: min(560px, 76%); height: 8px; pointer-events: none;
  background:
    radial-gradient(circle 3.6px at 50% 50%, rgba(175, 208, 255, .95) 0 1.2px, rgba(120, 168, 255, .30) 99%, transparent 100%),
    linear-gradient(90deg, transparent, rgba(120, 168, 255, .20) 30%, rgba(120, 168, 255, .20) 70%, transparent);
  background-repeat: no-repeat;
  background-size: 100% 100%, 100% 1px;
  background-position: 0 0, 0 center;
}
.section-soft::before { top: -4px; }
.section-soft::after { bottom: -4px; }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head.left { text-align: left; margin-left: 0; }
.section-head h2 { font-size: 36px; margin: 12px 0 14px; letter-spacing: -.3px; }
.section-head .lead { font-size: 16px; color: var(--c-ink-500); }

/* 章节序号系统：编辑感锚点（纯 CSS counter，仅首页 main 生效） */
main:has(#heroFlow) { counter-reset: lidousec; }
main:has(#heroFlow) .section-head { counter-increment: lidousec; }
main:has(#heroFlow) .section-head::before {
  content: counter(lidousec, decimal-leading-zero);
  display: block;
  font-family: "SFMono-Regular", Consolas, "Courier New", monospace;
  font-size: 12px; font-weight: 600; letter-spacing: 2.5px;
  color: #7FB2FF; opacity: .72; margin-bottom: 6px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; color: #7FB2FF; letter-spacing: 3.5px;
}
.eyebrow::before, .eyebrow::after { content: ""; width: 26px; height: 2px; background: linear-gradient(90deg, transparent, var(--c-primary-500)); border-radius: 2px; }
.eyebrow::after { background: linear-gradient(90deg, var(--c-primary-500), transparent); }
.section-head.left .eyebrow::before { display: none; }

.sub-title { font-size: 22px; margin: 52px 0 10px; }
.sub-title:first-child { margin-top: 0; }
.note {
  font-size: 13.5px; color: var(--c-ink-500); background: var(--c-glass);
  border-left: 3px solid var(--c-primary-500); border-radius: 0 10px 10px 0;
  padding: 12px 16px; margin-top: 18px;
}

/* ---------- 网格与玻璃卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: var(--c-glass); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm); transition: all .28s ease; position: relative; overflow: hidden;
}
.card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-md), 0 0 34px rgba(62, 139, 255, .12);
  border-color: var(--c-line-2);
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--c-ink-500); }
.card .ic {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  font-size: 22px; margin-bottom: 16px; background: var(--c-primary-50); border: 1px solid var(--c-line);
}
.card .ic.purple { background: var(--c-accent-50); }
.card .ic.teal { background: var(--c-teal-50); }
.card-index {
  font-size: 13px; font-weight: 800; color: var(--c-primary-400); letter-spacing: 1px; margin-bottom: 8px; opacity: .85;
}
.card-foot { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }

/* 档位卡片 */
.tier-card { display: flex; flex-direction: column; }
.tier-card .badge-hot {
  position: absolute; top: 16px; right: -34px; transform: rotate(45deg);
  background: linear-gradient(135deg, #35C3F3, #6D5AE6);
  color: #fff; font-size: 12px; font-weight: 700; padding: 4px 40px; letter-spacing: 1px;
}
.tier-card.is-hot {
  border: 1.5px solid var(--c-primary-400);
  box-shadow: var(--shadow-primary), 0 0 44px rgba(62, 139, 255, .18);
  background: rgba(90, 151, 244, .09);
}
.tier-price { font-size: 26px; font-weight: 800; color: #8FB8FF; margin: 6px 0 2px; }
.tier-price small { font-size: 13px; color: var(--c-ink-400); font-weight: 500; }
.tier-term { font-size: 13px; color: var(--c-ink-500); margin-bottom: 14px; }
.tier-list { margin: 14px 0 20px; flex: 1; }
.tier-list li { position: relative; padding: 5px 0 5px 26px; font-size: 14px; color: var(--c-ink-700); }
.tier-list li::before {
  content: "✓"; position: absolute; left: 0; top: 5px; width: 17px; height: 17px;
  border-radius: 50%; background: var(--c-primary-50); color: #8FB8FF;
  font-size: 11px; font-weight: 800; display: grid; place-items: center;
}

/* ---------- 页面头（内页） ---------- */
.page-hero {
  position: relative; overflow: hidden; padding: 58px 0 50px;
  border-bottom: 1px solid rgba(148, 178, 255, .08);
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(148, 178, 255, .12) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 82%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb { font-size: 13px; color: var(--c-ink-400); margin-bottom: 18px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--c-ink-400); }
.breadcrumb a { color: var(--c-ink-500); }
.breadcrumb a:hover { color: var(--c-primary-400); }
.breadcrumb [aria-current="page"] { color: var(--c-primary-400); font-weight: 600; }
.page-hero h1 { font-size: 34px; margin: 10px 0 14px; letter-spacing: -.3px; }
.page-hero .lead { font-size: 16px; color: var(--c-ink-500); max-width: 820px; }

/* ---------- 表格（深色玻璃） ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius); background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: var(--shadow-sm); margin-top: 20px; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
table.data caption { caption-side: top; text-align: left; font-size: 13px; color: var(--c-ink-400); padding: 14px 18px 0; }
table.data th, table.data td { padding: 13px 18px; text-align: left; border-bottom: 1px solid rgba(148, 178, 255, .10); vertical-align: top; }
table.data thead th { background: rgba(148, 178, 255, .08); color: var(--c-ink-900); font-size: 13.5px; white-space: nowrap; }
table.data tbody th { color: var(--c-ink-900); font-weight: 600; white-space: nowrap; }
table.data tbody tr:last-child th, table.data tbody tr:last-child td { border-bottom: none; }
table.data tbody tr:hover { background: rgba(90, 151, 244, .07); }
tr.is-rec-row { background: rgba(90, 151, 244, .10); }
tr.is-rec-row:hover { background: rgba(90, 151, 244, .15); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; margin-top: 30px; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--c-primary-500), var(--c-accent-500)); border-radius: 2px; opacity: .6; }
.tl-item { position: relative; padding: 0 0 30px 22px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -26px; top: 7px; width: 16px; height: 16px;
  border-radius: 50%; background: #0A1430; border: 3.5px solid var(--c-primary-400);
  box-shadow: 0 0 0 4px rgba(90, 151, 244, .12), 0 0 12px rgba(90, 151, 244, .5);
}
.tl-year { display: inline-block; font-size: 13px; font-weight: 800; color: #9CC2FF; background: var(--c-primary-50); border: 1px solid var(--c-line); border-radius: 8px; padding: 2px 12px; margin-bottom: 8px; }
.tl-item h3 { font-size: 17px; margin-bottom: 6px; }
.tl-item p { font-size: 14px; color: var(--c-ink-500); }

/* ---------- 步骤流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; margin-top: 28px; }
.flow-8 { grid-template-columns: repeat(4, 1fr); }
.flow-step {
  background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 22px; position: relative; box-shadow: var(--shadow-sm); transition: all .25s;
}
.flow-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-line-2); }
.flow-node {
  width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, #35C3F3, #3E8BFF);
  color: #fff; font-weight: 800; font-size: 15px; margin-bottom: 14px; box-shadow: var(--shadow-primary);
}
.flow-step h3 { font-size: 16px; margin-bottom: 8px; }
.flow-step p { font-size: 13.5px; color: var(--c-ink-500); }
.flow-desc { min-height: 66px; }
.flow-step .out { font-size: 12.5px; color: var(--c-ink-500); background: rgba(148, 178, 255, .07); border-radius: 8px; padding: 6px 10px; margin-top: 10px; }
.flow-step .out b { color: #9CC2FF; font-weight: 700; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 14px; margin-top: 30px; }
.faq-item { background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--c-line); border-radius: 14px; overflow: hidden; transition: border-color .25s; }
.faq-item[open] { border-color: var(--c-line-2); box-shadow: var(--shadow-sm), 0 0 24px rgba(62, 139, 255, .08); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 22px; font-size: 16px; font-weight: 600;
  color: var(--c-ink-900); display: flex; align-items: center; gap: 12px; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: ""; margin-left: auto; width: 10px; height: 10px; flex-shrink: 0;
  border-right: 2.5px solid var(--c-primary-400); border-bottom: 2.5px solid var(--c-primary-400);
  transform: rotate(45deg); transition: transform .25s; margin-top: -4px;
}
.faq-item[open] summary::after { transform: rotate(225deg); margin-top: 4px; }
.faq-item .faq-a { padding: 0 22px 20px; font-size: 14.5px; color: var(--c-ink-500); border-top: 1px dashed rgba(148, 178, 255, .16); padding-top: 16px; margin: 0 22px 20px; padding-left: 0; padding-right: 0; }

/* ---------- 速诊卡片（深空霓虹） ---------- */
.speediag {
  position: relative; overflow: hidden; border-radius: 22px; padding: 40px;
  background:
    radial-gradient(560px 300px at 92% 8%, rgba(139, 124, 255, .32), transparent 60%),
    radial-gradient(520px 320px at 6% 100%, rgba(18, 181, 169, .20), transparent 55%),
    linear-gradient(135deg, #0A1C42 0%, #143A8F 60%, #3A2FA0 100%);
  border: 1px solid rgba(148, 178, 255, .22);
  color: #fff; box-shadow: var(--shadow-lg), 0 0 60px rgba(62, 139, 255, .14);
  display: grid; grid-template-columns: 1.35fr .65fr; gap: 36px; align-items: center;
}
.speediag::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 24px 24px; opacity: .5;
}
.speediag h2 { color: #fff; font-size: 27px; margin-bottom: 12px; }
.speediag p { color: rgba(255,255,255,.82); font-size: 15px; max-width: 560px; }
.speediag .sd-points { margin: 18px 0 24px; display: grid; gap: 9px; }
.speediag .sd-points li { position: relative; padding-left: 26px; font-size: 14.5px; color: rgba(255,255,255,.92); }
.speediag .sd-points li::before { content: "✓"; position: absolute; left: 0; font-weight: 800; color: #5EEAD4; }
.sd-qr {
  position: relative; z-index: 2; background: #fff; border-radius: 18px; padding: 18px 18px 14px;
  text-align: center; width: max-content; margin: 0 auto; box-shadow: 0 12px 30px rgba(2, 8, 26, .5);
}
.sd-qr img { width: 158px; height: 158px; border-radius: 8px; }
.sd-qr figcaption { font-size: 12.5px; color: #55678A; margin-top: 10px; max-width: 180px; line-height: 1.5; }
.sd-note { position: relative; z-index: 2; font-size: 12.5px; color: rgba(255,255,255,.66); margin-top: 14px; }

/* ---------- 弹窗（深色玻璃） ---------- */
.modal {
  position: fixed; inset: 0; z-index: 300; display: none; align-items: center; justify-content: center;
  background: rgba(3, 7, 18, .68); backdrop-filter: blur(6px); padding: 20px;
}
.modal.is-open { display: flex; }
.modal-card {
  background: rgba(10, 20, 44, .92); backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid var(--c-line-2);
  border-radius: 20px; width: min(560px, 100%); max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-lg); position: relative; animation: modalIn .3s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(22px) scale(.97); } to { opacity: 1; transform: none; } }
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--c-line); background: rgba(148, 178, 255, .08); color: var(--c-ink-500); font-size: 17px;
  cursor: pointer; transition: all .2s; z-index: 2;
}
.modal-close:hover { background: rgba(90, 151, 244, .16); color: #9CC2FF; }
.modal-head { padding: 30px 30px 0; }
.modal-head h3 { font-size: 21px; }
.modal-head p { font-size: 13.5px; color: var(--c-ink-500); margin-top: 6px; }
.modal-body { padding: 22px 30px 30px; }

/* ---------- 表单（深色玻璃） ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 7px; font-size: 13.5px; font-weight: 600; color: var(--c-ink-700); }
.form-field.full { grid-column: 1 / -1; }
.form-field input, .form-field select, .form-field textarea {
  font-family: inherit; font-size: 14.5px; padding: 11px 14px;
  border: 1.5px solid rgba(148, 178, 255, .18); border-radius: 11px;
  background: rgba(6, 13, 32, .6); color: var(--c-ink-900);
  transition: border-color .2s, box-shadow .2s; width: 100%;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--c-ink-400); }
.form-field select option { background: #0A1430; color: #EAF1FD; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--c-primary-400); box-shadow: 0 0 0 3.5px rgba(90, 151, 244, .18);
}
.form-msg { font-size: 13.5px; min-height: 20px; margin-top: 4px; }
.form-msg.is-error { color: var(--c-danger); }
.form-success { text-align: center; padding: 26px 10px; font-size: 16px; font-weight: 600; color: var(--c-success); }
.form-privacy { font-size: 12px; color: var(--c-ink-400); text-align: center; margin-top: 12px; }

/* ---------- 页脚（深空底 + 顶部分割辉光） ---------- */
.site-footer {
  background: rgba(4, 8, 22, .88); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(148, 178, 255, .12);
  box-shadow: 0 -1px 30px rgba(62, 139, 255, .06);
  color: rgba(255,255,255,.72); margin-top: 72px;
}
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding: 56px 0 40px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand > p { font-size: 13.5px; color: rgba(255,255,255,.55); margin-top: 16px; line-height: 1.8; }
.footer-col h3 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { color: rgba(255,255,255,.6); font-size: 13.5px; transition: color .2s; }
.footer-col a:hover { color: #9CC2FF; }
.footer-col li span { color: rgba(255,255,255,.6); font-size: 13.5px; }
.footer-qr { display: flex; align-items: center; gap: 14px; }
.footer-qr img { width: 96px; height: 96px; border-radius: 10px; }
.footer-qr .qr-box { background: #fff; padding: 6px; border-radius: 12px; }
.footer-qr .qr-meta b { display: block; color: #fff; font-size: 13.5px; margin-bottom: 4px; }
.footer-qr .qr-meta span { font-size: 12px; color: rgba(255,255,255,.5); }
.footer-bottom {
  border-top: 1px solid rgba(148, 178, 255, .10); padding: 22px 0;
  display: flex; flex-wrap: wrap; gap: 10px 28px; justify-content: center;
  font-size: 12.5px; color: rgba(255,255,255,.45);
}
.footer-bottom a { color: rgba(255,255,255,.45); }
.footer-bottom a:hover { color: #9CC2FF; }

/* ---------- 内链 CTA（玻璃渐变带） ---------- */
.cta-band {
  border-radius: 20px; padding: 38px 40px; text-align: center;
  background:
    radial-gradient(420px 200px at 12% 0%, rgba(53, 195, 243, .10), transparent 60%),
    radial-gradient(420px 200px at 88% 100%, rgba(139, 124, 255, .12), transparent 60%),
    var(--c-glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--c-line-2);
}
.cta-band h2 { font-size: 26px; margin-bottom: 10px; }
.cta-band p { color: var(--c-ink-500); margin-bottom: 22px; }
.cta-band .btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 标签页 ---------- */
.tabs { display: flex; gap: 10px; justify-content: center; margin-bottom: 34px; flex-wrap: wrap; }
.tab-btn {
  padding: 10px 26px; border-radius: 999px; border: 1.5px solid var(--c-line);
  background: var(--c-glass); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  font-size: 15px; font-weight: 600; color: var(--c-ink-500); cursor: pointer; transition: all .22s; font-family: inherit;
}
.tab-btn:hover { border-color: var(--c-line-2); color: #9CC2FF; }
.tab-btn.is-active {
  background: linear-gradient(135deg, #35C3F3, #3E8BFF); border-color: transparent;
  color: #fff; box-shadow: var(--shadow-primary);
}
.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: fadeIn .35s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- 文章 ---------- */
.article-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.article-card .art-cover { height: 172px; overflow: hidden; }
.article-card .art-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.article-card:hover .art-cover img { transform: scale(1.06); }
.article-card .art-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.art-meta { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--c-ink-400); margin-bottom: 10px; }
.article-card h3 { font-size: 17px; line-height: 1.5; }
.article-card p { margin-top: 8px; flex: 1; }
.art-more { margin-top: 14px; font-size: 13.5px; font-weight: 700; color: #8FB8FF; }

.feature-article { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
.feature-article .fa-cover img { border-radius: 18px; box-shadow: var(--shadow-md); border: 1px solid var(--c-line); }
.feature-article h3 { font-size: 23px; margin: 12px 0 12px; }

/* ---------- 团队 ---------- */
.team-card { text-align: center; padding: 34px 24px; }
.avatar {
  width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 16px;
  display: grid; place-items: center; font-size: 26px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, #35C3F3, #6D5AE6);
  box-shadow: 0 8px 24px rgba(62, 139, 255, .35);
}
.team-card h3 { font-size: 18px; }
.team-card .role { font-size: 13px; color: #8FB8FF; font-weight: 700; margin-bottom: 10px; }
.team-card p { font-size: 13.5px; }

/* ---------- 资质 ---------- */
.honor-card { text-align: center; padding: 28px 20px; }
.honor-card .hn-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 18px;
  background: linear-gradient(135deg, var(--c-primary-50), var(--c-accent-50));
  display: grid; place-items: center; font-size: 30px;
  border: 1px solid var(--c-line);
}
.honor-card .hn-no { font-size: 12.5px; color: var(--c-ink-400); margin-top: 8px; word-break: break-all; }

/* ---------- 场景标签 ---------- */
.scene-grid .card { display: flex; gap: 14px; align-items: flex-start; padding: 22px; }
.scene-grid .sn { font-size: 20px; flex-shrink: 0; margin-top: 2px; }

/* ---------- 边界/合规（暗色琥珀警示） ---------- */
.boundary-box {
  background: var(--c-warn-bg); border: 1.5px solid var(--c-warn-line);
  border-radius: var(--radius); padding: 26px 28px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.boundary-box h3 { color: var(--c-warn-ink); font-size: 17px; margin-bottom: 12px; display: flex; align-items: center; gap: 9px; }
.boundary-box ul { display: grid; gap: 9px; }
.boundary-box li { position: relative; padding-left: 22px; font-size: 14px; color: #D9BE85; }
.boundary-box li::before { content: "!"; position: absolute; left: 0; top: 1px; width: 15px; height: 15px; border-radius: 50%; background: var(--c-warn-ink); color: #20150a; font-size: 10.5px; font-weight: 800; display: grid; place-items: center; }
.boundary-box p { font-size: 14px; color: #D9BE85; }

.clause-list { display: grid; gap: 14px; margin-top: 26px; counter-reset: clause; }
.clause {
  background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-line); border-radius: 14px; padding: 20px 24px;
  display: grid; grid-template-columns: 44px 1fr; gap: 16px; box-shadow: var(--shadow-sm);
}
.clause-no {
  width: 44px; height: 44px; border-radius: 13px; background: var(--c-primary-50);
  border: 1px solid var(--c-line);
  color: #8FB8FF; font-weight: 800; font-size: 16px; display: grid; place-items: center;
}
.clause h3 { font-size: 16px; margin-bottom: 6px; }
.clause p { font-size: 14px; color: var(--c-ink-500); }

/* ---------- 三阶段（抓取-采信-推荐） ---------- */
.stage-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 14px; align-items: stretch; margin-top: 30px; }
.stage-card {
  background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid var(--c-line); border-radius: 18px; padding: 26px; text-align: center; box-shadow: var(--shadow-sm);
}
.stage-card .st-ic { width: 58px; height: 58px; margin: 0 auto 14px; border-radius: 16px; display: grid; place-items: center; font-size: 27px; background: var(--c-primary-50); border: 1px solid var(--c-line); }
.stage-card h3 { font-size: 18px; }
.stage-card .st-sub { font-size: 12.5px; color: #8FB8FF; font-weight: 700; margin: 2px 0 10px; }
.stage-arrow { display: grid; place-items: center; font-size: 24px; color: var(--c-primary-500); font-weight: 800; }
.stage-card p { font-size: 13.5px; color: var(--c-ink-500); }
.stage-note { text-align: center; font-size: 13px; color: var(--c-ink-400); margin-top: 16px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.nap-list { display: grid; gap: 14px; margin-top: 20px; }
.nap-item {
  display: flex; gap: 14px; background: var(--c-glass);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-line); border-radius: 14px; padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.nap-item .ic { width: 42px; height: 42px; border-radius: 12px; background: var(--c-primary-50); border: 1px solid var(--c-line); display: grid; place-items: center; font-size: 19px; flex-shrink: 0; }
.nap-item b { display: block; font-size: 14px; color: var(--c-ink-900); margin-bottom: 2px; }
.nap-item span, .nap-item a { font-size: 13.5px; color: var(--c-ink-500); word-break: break-all; }
.map-box { border-radius: 18px; overflow: hidden; border: 1px solid var(--c-line); box-shadow: var(--shadow-sm); margin-top: 22px; background: var(--c-glass); }
.map-box iframe { display: block; width: 100%; height: 280px; border: 0; }

/* ---------- 对比双栏（vs） ---------- */
.vs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.vs-card { border-radius: 18px; padding: 28px; border: 1.5px solid var(--c-line); background: var(--c-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.vs-card.is-good { border-color: var(--c-line-2); background: linear-gradient(180deg, rgba(90, 151, 244, .10), var(--c-glass) 45%); }
.vs-card h3 { font-size: 18px; margin-bottom: 14px; }
.vs-card ul { display: grid; gap: 10px; }
.vs-card li { position: relative; padding-left: 24px; font-size: 14px; }
.vs-card li.no::before, .vs-card li.yes::before {
  position: absolute; left: 0; top: 1px; width: 17px; height: 17px; border-radius: 50%;
  font-size: 11px; font-weight: 800; display: grid; place-items: center;
}
.vs-card li.yes::before { content: "✓"; background: var(--c-primary-50); color: #8FB8FF; }
.vs-card li.no::before { content: "✕"; background: rgba(248, 113, 113, .14); color: var(--c-danger); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .page-hero::after,
  .card::after, .faq-item::after, .flow-step::after, .stage-card::after, .vs-card::after { display: none; }
}

/* ---------- 星流设计语言延伸（全站视觉统一） ---------- */
/* 玻璃卡片悬停光扫：星流的微互动回声 */
.faq-item, .stage-card, .vs-card, .flow-step { position: relative; overflow: hidden; }
.card::after, .faq-item::after, .flow-step::after, .stage-card::after, .vs-card::after {
  content: ""; position: absolute; top: -20%; left: -70%; width: 45%; height: 140%;
  background: linear-gradient(105deg, transparent, rgba(150, 190, 255, .10), transparent);
  transform: skewX(-18deg); pointer-events: none; z-index: 1;
}
.card:hover::after, .faq-item:hover::after, .flow-step:hover::after,
.stage-card:hover::after, .vs-card:hover::after {
  left: 132%; transition: left .85s ease;
}

/* 内页流星：每 9 秒一颗微光划过页头，呼应首页星流 */
.page-hero::after {
  content: ""; position: absolute; top: 22%; left: -160px; width: 130px; height: 1.5px;
  background: linear-gradient(90deg, transparent, rgba(140, 188, 251, .85), transparent);
  transform: rotate(-16deg); opacity: 0; pointer-events: none;
  animation: meteor 14s ease-in 2s infinite;
}
@keyframes meteor {
  0% { left: -160px; opacity: 0; }
  5% { opacity: .7; }
  16% { left: 108%; opacity: 0; }
  100% { left: 108%; opacity: 0; }
}

/* ---------- 知识库文章页与列表链接化 ---------- */
/* 列表卡片/快讯条目整体可点击 */
a.article-card, a.clause { color: inherit; text-decoration: none; }
a.article-card:hover h3, a.clause:hover h3 { color: #C4DAFF; }
a.clause { transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease; }
a.clause:hover {
  border-color: var(--c-line-2); transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 26px rgba(62, 139, 255, .10);
}
/* 文章正文（编辑级排版） */
.article-wrap { max-width: 880px; }
.article-hero-meta { display: flex; align-items: center; gap: 12px; margin-top: 16px; font-size: 13px; color: var(--c-ink-400); }
.article-body { font-size: 16px; }
.article-body h2 {
  font-size: 23px; margin: 44px 0 6px; padding-left: 14px;
  border-left: 3px solid var(--c-primary-500);
}
.article-body h3 { font-size: 18px; margin: 30px 0 8px; }
.article-body p { margin: 12px 0; color: var(--c-ink-700); }
.article-body ul { margin: 14px 0; display: grid; gap: 9px; }
.article-body li { position: relative; padding-left: 24px; color: var(--c-ink-700); }
.article-body li::before {
  content: "✦"; position: absolute; left: 2px; top: 2px;
  font-size: 11px; color: var(--c-primary-400);
}
.article-body strong { color: var(--c-ink-900); }
.article-body .lead-p { font-size: 17px; color: var(--c-ink-900); }
.article-foot {
  margin-top: 46px; padding-top: 22px; border-top: 1px solid var(--c-line);
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center;
}
/* 导航 Logo 彩蛋 hover（点击重现星流，见 lidou-field.js） */
.brand-logo { transition: transform .25s ease; }
.brand:hover .brand-logo { transform: scale(1.08) rotate(-4deg); }

/* ---------- 404 ---------- */
.nf-wrap { text-align: center; padding: 110px 24px; }
.nf-code { font-size: 96px; font-weight: 800; background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1.1; }

/* ---------- 响应式 ---------- */
/* 导航折叠断点 1280px：10 项链接在更窄容器内无法单行排布，提前收纳为汉堡菜单 */
@media (max-width: 1280px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: rgba(5, 10, 26, .96); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow-lg);
    padding: 12px 24px 20px; max-height: calc(100vh - 68px); overflow-y: auto;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .site-nav a { padding: 12px 14px; font-size: 15px; border-radius: 10px; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .site-nav a[aria-current="page"] { background: rgba(90, 151, 244, .12); }
  .nav-cta { display: none; }
}
@media (max-width: 1080px) {
  .hero h1 { font-size: 40px; }
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow-8 { grid-template-columns: repeat(2, 1fr); }
  .stage-flow { grid-template-columns: 1fr; }
  .stage-arrow { transform: rotate(90deg); padding: 4px 0; }
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; padding: 56px 0 56px; gap: 40px; }
  .hero h1 { font-size: 33px; }
  .hero-visual { display: none; }
  .grid-3, .grid-2, .vs-grid, .contact-grid, .feature-article { grid-template-columns: 1fr; }
  .speediag { grid-template-columns: 1fr; padding: 30px 24px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .form-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 30px; }
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 28px; }
}
@media (max-width: 560px) {
  .grid-4, .grid-5, .flow, .flow-8 { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .clause { grid-template-columns: 1fr; }
}