/* ==========================================================================
   官网样式（tou 站）— 浅灰主题
   所有页面共用，请勿在页面内写死颜色
   ========================================================================== */
:root {
  --bg: #f5f7fb;
  --bg-2: #eef2f8;
  --panel: #ffffff;
  --panel-2: #f7f9fc;
  --line: #e6eaf2;
  --line-2: #d5dbe7;
  --text: #0f172a;
  --muted: #5b6b84;
  --muted-2: #8896ab;
  --brand: #2563eb;
  --brand-2: #0ea5e9;
  --brand-3: #7c3aed;
  --accent: #1d7fd6;
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 10px 30px rgba(15, 23, 42, .07);
  --shadow-lg: 0 4px 8px rgba(15, 23, 42, .04), 0 24px 56px rgba(15, 23, 42, .12);
  --glow: 0 0 0 1px rgba(37, 99, 235, .22), 0 16px 40px rgba(37, 99, 235, .12);
  --maxw: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(37, 99, 235, .09), transparent 62%),
    radial-gradient(800px 600px at 88% 0%, rgba(124, 58, 237, .07), transparent 64%),
    radial-gradient(1000px 700px at 50% 110%, rgba(14, 165, 233, .06), transparent 62%);
  pointer-events: none;
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: .2px; color: var(--text); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.grad-text {
  background: linear-gradient(100deg, #1d4ed8 0%, #0891b2 48%, #6d28d9 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.muted { color: var(--muted); }
.center { text-align: center; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ------------------------------- 顶部导航 ------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 72px; display: flex; align-items: center; gap: 28px;
}
.logo { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 17px; white-space: nowrap; }
.logo .mark {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--brand), var(--brand-2) 55%, var(--brand-3));
  display: grid; place-items: center; color: #fff; font-weight: 900; font-size: 17px;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .30);
}
.logo .sub { font-size: 11px; color: var(--muted-2); font-weight: 500; letter-spacing: .5px; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  padding: 9px 15px; border-radius: 10px; font-size: 14.5px; color: var(--muted);
  transition: .18s; white-space: nowrap;
}
.nav a:hover { color: var(--brand); background: var(--panel-2); }
.nav a.active { color: var(--brand); background: rgba(37, 99, 235, .09); font-weight: 600; box-shadow: inset 0 0 0 1px rgba(37, 99, 235, .16); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line-2);
  background: #fff; color: var(--text); font-size: 18px; cursor: pointer;
}

/* -------------------------------- 按钮 -------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 11px; font-size: 14.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .2s; white-space: nowrap;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(100deg, var(--brand), var(--brand-2));
  color: #fff; box-shadow: 0 6px 18px rgba(37, 99, 235, .28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(37, 99, 235, .36); }
.btn-ghost { background: #fff; color: var(--text); border-color: var(--line-2); }
.btn-ghost:hover { background: #f5f9ff; border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn-sm { padding: 8px 16px; font-size: 13.5px; }
.btn-lg { padding: 15px 34px; font-size: 16px; border-radius: 13px; }
.btn-block { width: 100%; }

/* -------------------------------- 区块 -------------------------------- */
.section { padding: 92px 0; }
.section-sm { padding: 64px 0; }
.section-head { text-align: center; max-width: 780px; margin: 0 auto 54px; }
.section-head .eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px; font-size: 12.5px;
  color: var(--brand); background: rgba(37, 99, 235, .08); border: 1px solid rgba(37, 99, 235, .20);
  margin-bottom: 16px; letter-spacing: .6px; font-weight: 600;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 40px); margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 15.5px; }

/* -------------------------------- 英雄区 -------------------------------- */
.hero { padding: 84px 0 72px; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 15px; border-radius: 999px;
  background: #fff; border: 1px solid rgba(37, 99, 235, .22);
  font-size: 13px; color: var(--brand); margin-bottom: 22px; box-shadow: var(--shadow);
}
.hero .badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(22, 163, 74, .18); }
.hero h1 { font-size: clamp(30px, 4.6vw, 54px); line-height: 1.18; margin-bottom: 20px; }
.hero .lead { font-size: 16.5px; color: var(--muted); margin-bottom: 16px; max-width: 620px; }
.hero .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.hero .tags span {
  font-size: 12.5px; padding: 5px 12px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line); color: var(--muted);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { margin-top: 20px; font-size: 13px; color: var(--muted-2); }

/* 英雄区右侧数据面板 */
.hero-panel { position: relative; }
.glass {
  background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.dash-card { padding: 24px; }
.dash-card .dash-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.dash-card .dash-head h4 { font-size: 14.5px; color: var(--muted); font-weight: 600; }
.dash-card .pill { font-size: 11.5px; padding: 3px 10px; border-radius: 999px; background: #ecfdf3; color: #15803d; border: 1px solid #bbf7d0; font-weight: 600; }
.kpi-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 20px; }
.kpi { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 13px; }
.kpi .k { font-size: 11.5px; color: var(--muted-2); margin-bottom: 5px; }
.kpi .v { font-size: 19px; font-weight: 700; color: var(--text); }
.kpi .v.up { color: var(--ok); }
.kpi .v.down { color: var(--danger); }
.bars { display: flex; align-items: flex-end; gap: 7px; height: 118px; }
.bars i {
  flex: 1; border-radius: 6px 6px 2px 2px;
  background: linear-gradient(180deg, #38bdf8, rgba(37, 99, 235, .32));
  animation: grow .9s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes grow { from { height: 4px !important; opacity: .2; } }
.float-chip {
  position: absolute; padding: 10px 16px; border-radius: 13px; font-size: 13px; font-weight: 600;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-lg); color: var(--brand);
  animation: float 5s ease-in-out infinite; white-space: nowrap;
}
/* 三个角标都锚定在卡片外沿，避免遮挡图表内容 */
.float-chip.a { top: -32px; left: -16px; }
.float-chip.b { bottom: -30px; right: 6px; color: var(--brand-3); animation-delay: -2.2s; }
.float-chip.c { bottom: -30px; left: 30px; color: var(--ok); animation-delay: -3.6s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }

/* -------------------------------- 卡片网格 -------------------------------- */
.grid { display: grid; gap: 22px; }
.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 {
  background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
  transition: .25s; position: relative; overflow: hidden; box-shadow: var(--shadow);
}
.card:hover { transform: translateY(-5px); border-color: rgba(37, 99, 235, .35); box-shadow: var(--glow); }
.card .icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  font-size: 20px; margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(14, 165, 233, .07));
  border: 1px solid rgba(37, 99, 235, .20); color: var(--brand);
}
.card h3 { font-size: 18.5px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .link { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; color: var(--brand); font-size: 14px; font-weight: 600; }
.card .link:hover { gap: 10px; }

/* 特性列表 */
.check-list { display: grid; gap: 11px; margin-top: 16px; }
.check-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--muted); }
.check-list li::before { content: "✓"; color: var(--ok); font-weight: 700; flex: none; }

/* -------------------------------- 数据条 -------------------------------- */
.stat-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  padding: 32px; border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(37, 99, 235, .08), rgba(124, 58, 237, .06));
  border: 1px solid rgba(37, 99, 235, .16);
  box-shadow: var(--shadow);
}
.stat-band .item { }
.stat-band .n { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; }
.stat-band .l { font-size: 13.5px; color: var(--muted); margin-top: 4px; }
.item { text-align: center; }

/* ------------------------------ 平台 logo 墙 ------------------------------ */
.logo-wall { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.logo-wall span {
  padding: 13px 24px; border-radius: 13px; font-size: 15px; font-weight: 600; color: var(--muted);
  background: #fff; border: 1px solid var(--line); transition: .2s; box-shadow: var(--shadow);
}
.logo-wall span:hover { color: var(--brand); border-color: rgba(37, 99, 235, .40); background: #f5f9ff; }

/* -------------------------------- 流程 -------------------------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding: 26px 22px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.step .num {
  font-size: 30px; font-weight: 900; margin-bottom: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, .85), rgba(14, 165, 233, .55));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.step h4 { font-size: 16.5px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--muted); }
.steps-5 { grid-template-columns: repeat(5, 1fr); }

/* ------------------------------ 行业 / 标签 ------------------------------ */
.chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chips span {
  padding: 11px 22px; border-radius: 999px; font-size: 14.5px; color: var(--muted);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow);
}
.chips span:hover { color: var(--brand); border-color: rgba(37, 99, 235, .40); }

/* -------------------------------- 案例 -------------------------------- */
.case { padding: 26px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; transition: .25s; box-shadow: var(--shadow); }
.case:hover { transform: translateY(-5px); border-color: rgba(124, 58, 237, .38); box-shadow: var(--glow); }
.case .tag { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--brand); margin-bottom: 14px; }
.case .tag b { font-size: 11.5px; padding: 3px 9px; border-radius: 6px; background: rgba(37, 99, 235, .10); border: 1px solid rgba(37, 99, 235, .22); font-weight: 700; }
.case h4 { font-size: 17.5px; margin-bottom: 8px; }
.case .meta { font-size: 13px; color: var(--muted-2); margin-bottom: 10px; }
.case p { font-size: 14.5px; color: var(--muted); margin-bottom: 14px; }
.case .metric { display: flex; gap: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
.case .metric div { font-size: 12.5px; color: var(--muted-2); }
.case .metric b { display: block; font-size: 19px; color: var(--ok); }

/* -------------------------------- 评价 -------------------------------- */
.quote { padding: 26px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.quote .stars { color: #f59e0b; letter-spacing: 3px; margin-bottom: 12px; font-size: 14px; }
.quote p { font-size: 15px; color: #334155; font-style: italic; margin-bottom: 16px; }
.quote .who { font-size: 13.5px; color: var(--muted-2); }
.quote .who b { color: var(--text); display: block; font-size: 14.5px; font-style: normal; }

/* -------------------------------- FAQ -------------------------------- */
.faq { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff;
  padding: 4px 20px; transition: .2s; box-shadow: var(--shadow);
}
.faq details[open] { border-color: rgba(37, 99, 235, .34); background: #fff; }
.faq summary {
  cursor: pointer; padding: 16px 0; font-size: 15.5px; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--brand); font-size: 21px; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq .a { padding: 0 0 18px; color: var(--muted); font-size: 14.5px; }

/* -------------------------------- 资讯 -------------------------------- */
.news-card { display: flex; gap: 16px; padding: 22px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); transition: .25s; box-shadow: var(--shadow); }
.news-card:hover { transform: translateY(-4px); border-color: rgba(37, 99, 235, .35); box-shadow: var(--glow); }
.news-card .thumb {
  width: 62px; height: 62px; flex: none; border-radius: 14px; display: grid; place-items: center; font-size: 26px;
  background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(14, 165, 233, .07)); border: 1px solid var(--line);
}
.news-card .meta { display: flex; gap: 12px; font-size: 12.5px; color: var(--muted-2); margin-bottom: 7px; }
.news-card .meta em { font-style: normal; color: var(--brand); font-weight: 600; }
.news-card h4 { font-size: 16.5px; margin-bottom: 7px; }
.news-card p { font-size: 14px; color: var(--muted); }

/* ------------------------------ 分类筛选条 ------------------------------ */
.seg { display: inline-flex; flex-wrap: wrap; gap: 6px; padding: 6px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.seg button {
  padding: 9px 20px; border-radius: 999px; border: 0; background: transparent; color: var(--muted);
  font-size: 14px; font-weight: 600; font-family: inherit; cursor: pointer; transition: .18s;
}
.seg button:hover { color: var(--brand); background: var(--panel-2); }
.seg button.active { color: #fff; background: linear-gradient(100deg, var(--brand), var(--brand-2)); box-shadow: 0 4px 12px rgba(37, 99, 235, .26); }
.seg-wrap { display: flex; justify-content: center; margin-bottom: 34px; }

/* ------------------------------ 数据表格 ------------------------------ */
.data-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14.5px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.data-table th {
  text-align: left; padding: 14px 18px; background: var(--panel-2); color: var(--muted);
  font-weight: 600; white-space: nowrap; border-bottom: 1px solid var(--line); font-size: 13.5px;
}
.data-table td { padding: 14px 18px; border-bottom: 1px solid var(--line); color: var(--text); vertical-align: top; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover td { background: #f8fafd; }
.data-table td.mono, .data-table th.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.data-table .hl { color: var(--brand); font-weight: 600; }

/* -------------------------------- CTA -------------------------------- */
.cta-band {
  padding: 54px 40px; border-radius: var(--radius-lg); text-align: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, .10), rgba(124, 58, 237, .08) 55%, rgba(14, 165, 233, .09));
  border: 1px solid rgba(37, 99, 235, .18); position: relative; overflow: hidden; box-shadow: var(--shadow);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.cta-band p { color: var(--muted); margin-bottom: 28px; font-size: 15.5px; }

/* -------------------------------- 页脚 -------------------------------- */
.site-footer { border-top: 1px solid var(--line); background: #fff; padding: 58px 0 26px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr 1.3fr; gap: 34px; margin-bottom: 40px; }
.footer-grid h4 { font-size: 14.5px; margin-bottom: 15px; color: var(--text); }
.footer-grid a, .footer-grid .li { display: block; font-size: 14px; color: var(--muted); padding: 5px 0; }
.footer-grid a:hover { color: var(--brand); }
.footer-about p { color: var(--muted); font-size: 14px; margin: 16px 0 20px; max-width: 330px; }
.footer-bottom {
  padding-top: 22px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between; font-size: 13px; color: var(--muted-2);
}
.footer-bottom a:hover { color: var(--brand); }

/* 内页头部 */
.page-hero { padding: 76px 0 56px; text-align: center; }
.page-hero h1 { font-size: clamp(28px, 3.8vw, 44px); margin-bottom: 16px; }
.page-hero p { color: var(--muted); font-size: 16px; max-width: 760px; margin: 0 auto 28px; }
.breadcrumb { font-size: 13.5px; color: var(--muted-2); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--brand); }

/* 单页正文排版 */
.prose { max-width: 860px; margin: 0 auto; }
.prose h2 { font-size: 25px; margin: 42px 0 14px; }
.prose h3 { font-size: 19px; margin: 30px 0 10px; }
.prose p { color: var(--muted); margin-bottom: 14px; font-size: 15.5px; }
.prose ul { display: grid; gap: 10px; margin: 14px 0 20px; }
.prose ul li { color: var(--muted); font-size: 15px; padding-left: 20px; position: relative; }
.prose ul li::before { content: "▸"; position: absolute; left: 0; color: var(--brand); }

/* 联系页表单 */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: start; }
.form-card { padding: 30px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); font-size: 14.5px; font-family: inherit;
  background: #fff; border: 1px solid var(--line-2); color: var(--text); outline: none; transition: .18s;
}
.field input:hover, .field textarea:hover, .field select:hover { border-color: #b9c2d4; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37, 99, 235, .13); }
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.field textarea { min-height: 118px; resize: vertical; }
.field select option { background: #fff; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-tip { font-size: 12.5px; color: var(--muted-2); margin-top: 6px; }
.info-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.info-item .ic { width: 42px; height: 42px; flex: none; border-radius: 12px; display: grid; place-items: center; background: rgba(37, 99, 235, .09); border: 1px solid rgba(37, 99, 235, .20); color: var(--brand); }
.info-item h4 { font-size: 15px; margin-bottom: 4px; }
.info-item p, .info-item a { font-size: 14px; color: var(--muted); word-break: break-all; }
.info-item a:hover { color: var(--brand); }

/* 滚动淡入：默认可见，仅在 JS 开启 .reveal-on 后才隐藏，保证降级与打印可用 */
.reveal { opacity: 1; }
.reveal-on .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.2, .8, .3, 1);
}
.reveal-on .reveal.shown { opacity: 1; transform: none; }
@media print { .reveal-on .reveal { opacity: 1 !important; transform: none !important; } }
@media (prefers-reduced-motion: reduce) {
  .reveal-on .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Toast */
.toast-host { position: fixed; right: 22px; bottom: 22px; z-index: 999; display: grid; gap: 10px; }
.toast {
  padding: 13px 18px; border-radius: 12px; font-size: 14px; min-width: 210px;
  background: #fff; color: var(--text); border: 1px solid var(--line); box-shadow: var(--shadow-lg);
  animation: toastIn .28s ease both;
}
.toast.ok { border-color: #86efac; background: #f6fef9; }
.toast.err { border-color: #fecaca; background: #fff7f7; }
@keyframes toastIn { from { opacity: 0; transform: translateY(14px); } }

/* 回到顶部 */
.to-top {
  position: fixed; right: 22px; bottom: 92px; width: 44px; height: 44px; border-radius: 13px; z-index: 60;
  display: grid; place-items: center; cursor: pointer; opacity: 0; pointer-events: none; transition: .25s;
  background: #fff; border: 1px solid var(--line-2); color: var(--text); box-shadow: var(--shadow);
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { color: var(--brand); border-color: var(--brand); }

/* 浮动联系按钮 */
.float-contact {
  position: fixed; left: 22px; bottom: 22px; z-index: 60; display: flex; align-items: center; gap: 9px;
  padding: 11px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: linear-gradient(100deg, var(--brand), var(--brand-2)); color: #fff;
  box-shadow: 0 10px 26px rgba(37, 99, 235, .34);
}
.float-contact:hover { transform: translateY(-2px); }

/* ------------------------------ 响应式 ------------------------------ */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps, .steps-5 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .site-header .inner { gap: 12px; padding: 0 16px; }
  .logo { font-size: 15px; gap: 9px; }
  .logo .mark { width: 32px; height: 32px; border-radius: 9px; font-size: 15px; }
  .logo .sub { display: none; }
  .header-actions { margin-left: auto; gap: 8px; }
  .header-actions .btn-primary { padding: 7px 13px; font-size: 12.5px; }
  .nav { display: none; }
  .nav.open {
    display: flex; flex-direction: column; align-items: stretch; position: absolute;
    top: 72px; left: 0; right: 0; padding: 14px 20px 22px; gap: 4px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg);
  }
  .nav-toggle { display: grid; place-items: center; margin-left: auto; }
  .header-actions .btn-ghost { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: repeat(2, 1fr); }
  .steps, .steps-5 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 62px 0; }
  .cta-band { padding: 38px 22px; }
  .form-row { grid-template-columns: 1fr; }
  .float-contact { left: 14px; bottom: 14px; padding: 10px 15px; font-size: 13px; }
}