/* ==========================================================================
   晶闪聚合 HyperLinkCloud — 官网样式
   ========================================================================== */
:root {
  --navy-950: #050f22;
  --navy-900: #081a36;
  --navy-800: #0d2548;
  --navy-700: #14315c;
  --brand-700: #1749b8;
  --brand-600: #1d5fd6;
  --brand-500: #2b7bf3;
  --brand-400: #5c9bff;
  --cyan-400: #38bdf8;
  --cyan-300: #7dd3fc;
  --orange-500: #f59e0b;
  --orange-400: #fbbf24;
  --ink-900: #0f172a;
  --ink-700: #1e293b;
  --ink-600: #334155;
  --ink-500: #475569;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg-soft: #f4f8fe;
  --card: #ffffff;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, .09);
  --shadow-lg: 0 24px 60px rgba(8, 26, 54, .18);
  --container: 1180px;
}

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

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink-600);
  background: #fff;
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--brand-600); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand-500); }
ul, ol { list-style: none; }

h1, h2, h3, h4 { color: var(--ink-900); line-height: 1.3; font-weight: 700; }

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s, box-shadow .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.site-header .container { display: flex; align-items: center; gap: 32px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 19px; letter-spacing: .5px; flex-shrink: 0; }
.brand:hover { color: #fff; }
.brand svg { width: 34px; height: 34px; flex-shrink: 0; }
.brand .brand-en { display: block; font-size: 10px; font-weight: 400; letter-spacing: .14em; opacity: .65; text-transform: uppercase; line-height: 1.2; }
.site-header:not(.scrolled) .brand .brand-en { color: #fff; }

.nav { display: flex; gap: 6px; margin-left: auto; align-items: center; }
.nav a {
  color: rgba(255, 255, 255, .85); font-size: 15px; padding: 8px 14px; border-radius: 10px;
  font-weight: 500; transition: background .2s, color .2s;
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, .12); }
.nav a.active { color: #fff; background: rgba(255, 255, 255, .16); }
.nav .nav-cta {
  margin-left: 10px; padding: 9px 20px; border-radius: 999px;
  background: linear-gradient(135deg, var(--brand-500), var(--cyan-400));
  color: #04101f; font-weight: 700;
}
.nav .nav-cta:hover { filter: brightness(1.08); color: #04101f; }

.site-header.scrolled { background: rgba(255, 255, 255, .92); backdrop-filter: blur(14px); box-shadow: 0 1px 0 var(--line), 0 8px 30px rgba(15, 23, 42, .06); border-color: var(--line); }
.site-header.scrolled .brand { color: var(--ink-900); }
.site-header.scrolled .nav a { color: var(--ink-600); }
.site-header.scrolled .nav a:hover, .site-header.scrolled .nav a.active { color: var(--brand-600); background: #eef4ff; }
.site-header.scrolled .nav .nav-cta { color: #04101f; }

.menu-btn { display: none; margin-left: auto; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-btn span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: transform .25s, opacity .25s, background .25s; }
.site-header.scrolled .menu-btn span { background: var(--ink-900); }
.menu-open .menu-btn span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-open .menu-btn span:nth-child(2) { opacity: 0; }
.menu-open .menu-btn span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(1100px 520px at 78% -10%, rgba(43, 123, 243, .32), transparent 60%),
    radial-gradient(900px 480px at -8% 108%, rgba(56, 189, 248, .18), transparent 55%),
    linear-gradient(160deg, var(--navy-950) 0%, var(--navy-900) 44%, #0c2f60 100%);
  padding: 168px 0 96px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(720px 460px at 70% 30%, rgba(0,0,0,.5), transparent 75%);
  -webkit-mask-image: radial-gradient(720px 460px at 70% 30%, rgba(0,0,0,.5), transparent 75%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border-radius: 999px;
  background: rgba(56, 189, 248, .13); border: 1px solid rgba(56, 189, 248, .35);
  color: var(--cyan-300); font-size: 13px; letter-spacing: .06em; margin-bottom: 22px;
}
.hero-badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 0 4px rgba(56,189,248,.18); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 3px rgba(56,189,248,.28);} 50% { box-shadow: 0 0 0 7px rgba(56,189,248,.08);} }

.hero h1 { color: #fff; font-size: clamp(34px, 4.6vw, 54px); font-weight: 800; letter-spacing: .01em; }
.hero h1 .accent { background: linear-gradient(90deg, var(--brand-400), var(--cyan-300)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-slogan { margin-top: 14px; font-size: clamp(17px, 2vw, 21px); color: var(--cyan-300); font-weight: 600; letter-spacing: .04em; }
.hero-desc { margin-top: 18px; max-width: 560px; color: rgba(226, 238, 255, .78); font-size: 16.5px; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 28px; border-radius: 12px; font-size: 16px; font-weight: 700; cursor: pointer; border: 1px solid transparent; transition: transform .18s, box-shadow .18s, filter .18s, background .18s; }
.btn-primary { background: linear-gradient(135deg, var(--brand-500), var(--cyan-400)); color: #04101f; box-shadow: 0 10px 26px rgba(43, 123, 243, .4); }
.btn-primary:hover { color: #04101f; transform: translateY(-2px); box-shadow: 0 14px 34px rgba(43, 123, 243, .5); }
.btn-ghost { border-color: rgba(255,255,255,.35); color: #fff; background: rgba(255,255,255,.06); }
.btn-ghost:hover { background: rgba(255,255,255,.14); color: #fff; transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--brand-600); box-shadow: var(--shadow-md); }
.btn-light:hover { color: var(--brand-500); transform: translateY(-2px); }
.btn-outline { border-color: var(--brand-600); color: var(--brand-600); background: #fff; }
.btn-outline:hover { background: #eef4ff; color: var(--brand-500); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 10px; }

.hero-visual { position: relative; }
.hero-visual img { border-radius: var(--radius-lg); box-shadow: 0 30px 80px rgba(2, 10, 26, .55), 0 0 0 1px rgba(120, 180, 255, .18); }
.hero-visual::after {
  content: ""; position: absolute; inset: -40px -30px; z-index: -1; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(43, 123, 243, .3), transparent);
  filter: blur(30px);
}

.hero-stats { position: relative; margin-top: 76px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.hero-stats .stat { background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .13); border-radius: var(--radius); padding: 20px 22px; backdrop-filter: blur(6px); }
.stat-num { font-size: 30px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.stat-num small { font-size: 15px; font-weight: 600; color: var(--cyan-300); margin-left: 2px; }
.stat-label { font-size: 13px; color: rgba(214, 230, 255, .66); margin-top: 4px; }

/* ---------- 通用 Section ---------- */
.section { padding: 92px 0; }
.section.alt { background: var(--bg-soft); }
.section-deep { background: linear-gradient(180deg, var(--navy-950), var(--navy-900)); color: #d7e4ff; }
.section-deep h2, .section-deep h3 { color: #fff; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .22em; color: var(--brand-600); text-transform: uppercase; margin-bottom: 12px; }
.section-deep .eyebrow { color: var(--cyan-300); }
.section-head { max-width: 760px; margin-bottom: 46px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; }
.section-head p { margin-top: 14px; font-size: 16.5px; color: var(--muted); }
.section-deep .section-head p { color: rgba(199, 216, 245, .72); }

/* 卡片 */
.cards { display: grid; gap: 22px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: transform .22s, box-shadow .22s, border-color .22s;
  position: relative;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #c7dbff; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--ink-500); }
.card .tag { position: absolute; top: 20px; right: 20px; font-size: 12px; font-weight: 700; color: var(--brand-600); background: #eef4ff; border-radius: 999px; padding: 4px 12px; }
.card .tag.orange { color: #b45309; background: #fff7e6; }

.icon-chip {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #eaf2ff, #f7fbff); border: 1px solid #dbe8ff; margin-bottom: 18px;
}
.icon-chip svg { width: 27px; height: 27px; stroke: var(--brand-600); fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.icon-chip.cyan svg { stroke: #0891b2; }
.icon-chip.orange { background: linear-gradient(135deg,#fff4dd,#fffaf0); border-color: #ffe6b3; }
.icon-chip.orange svg { stroke: #d97706; }

/* 深色区卡片 */
.section-deep .card { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .12); box-shadow: none; }
.section-deep .card:hover { border-color: rgba(125, 211, 252, .45); }
.section-deep .card p { color: rgba(199, 216, 245, .75); }
.section-deep .icon-chip { background: rgba(56, 189, 248, .1); border-color: rgba(56, 189, 248, .3); }
.section-deep .icon-chip svg { stroke: var(--cyan-300); }

/* 列表 */
.feature-list li { position: relative; padding-left: 26px; margin-bottom: 10px; font-size: 15px; color: var(--ink-500); }
.feature-list li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 9px; height: 9px; border-radius: 3px; background: linear-gradient(135deg, var(--brand-500), var(--cyan-400)); }
.section-deep .feature-list li { color: rgba(199, 216, 245, .8); }

/* 产品卡片（首页） */
.product-card { display: flex; flex-direction: column; gap: 6px; }
.product-card .pc-head { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
.product-card .pc-head h3 { font-size: 20px; }
.pc-num { font-size: 13px; font-weight: 800; color: var(--brand-600); background: #eef4ff; width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; letter-spacing: .02em; }
.pc-links { margin-top: auto; padding-top: 16px; font-weight: 700; font-size: 14.5px; }

/* 图版 */
.figure { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; box-shadow: var(--shadow-sm); }
.figure img { width: 100%; height: auto; border-radius: 10px; }
.figure figcaption { text-align: center; font-size: 13.5px; color: var(--muted); margin-top: 14px; }
.figure.on-dark { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.12); }
.figure.on-dark figcaption { color: rgba(199, 216, 245, .65); }

/* 数据条 */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.metric { text-align: center; padding: 26px 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.metric b { display: block; font-size: 34px; font-weight: 800; color: var(--brand-600); font-variant-numeric: tabular-nums; }
.metric span { font-size: 14px; color: var(--muted); }

/* 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-sm); }
table.data { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 620px; }
table.data th { background: #f0f5ff; color: var(--ink-900); text-align: left; padding: 13px 18px; font-weight: 700; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.data td { padding: 13px 18px; border-bottom: 1px solid #eef2f8; color: var(--ink-600); vertical-align: top; }
table.data tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: #f8faff; }
table.data td.hl, table.data th.hl { color: var(--brand-600); font-weight: 700; }

/* 双列布局 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.split .figure { margin: 0; }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; box-shadow: var(--shadow-sm); position: relative; }
.step::before { counter-increment: step; content: counter(step); display: inline-flex; width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--brand-500), var(--cyan-400)); color: #04101f; font-weight: 800; align-items: center; justify-content: center; font-size: 15px; margin-bottom: 14px; }
.step h4 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--muted); }

/* 时间线 */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--brand-500), var(--cyan-400), var(--orange-500)); border-radius: 2px; }
.timeline li { position: relative; padding-bottom: 28px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before { content: ""; position: absolute; left: -29px; top: 7px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--brand-500); }
.timeline .tl-year { font-weight: 800; color: var(--brand-600); font-size: 17px; margin-bottom: 4px; }
.timeline h4 { font-size: 16px; margin-bottom: 4px; }
.timeline p { font-size: 14.5px; color: var(--muted); }

/* 团队 */
.team-card { text-align: left; }
.team-avatar {
  width: 64px; height: 64px; border-radius: 18px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 800; color: #fff; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--brand-600), var(--cyan-400));
}
.team-card:nth-child(2) .team-avatar { background: linear-gradient(135deg, #0ea5e9, #38bdf8); }
.team-card:nth-child(3) .team-avatar { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.team-role { font-size: 13px; font-weight: 700; color: var(--brand-600); letter-spacing: .1em; margin-bottom: 6px; }
.team-card h3 { font-size: 20px; margin-bottom: 10px; }
.team-card p { font-size: 14.5px; color: var(--ink-500); }

/* 案例 */
.case-item { display: flex; gap: 16px; align-items: flex-start; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.case-item:last-child { border-bottom: 0; }
.case-status { flex-shrink: 0; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; margin-top: 3px; }
.case-status.done { color: #047857; background: #d9f5e6; }
.case-status.doing { color: #b45309; background: #fdf0d2; }
.case-status.multi { color: var(--brand-600); background: #e3edff; }
.case-item h4 { font-size: 16px; }
.case-item p { font-size: 14px; color: var(--muted); }

/* CTA 区 */
.cta-band { text-align: center; padding: 84px 24px; border-radius: var(--radius-lg); position: relative; overflow: hidden; background:
  radial-gradient(900px 380px at 50% -60%, rgba(56,189,248,.35), transparent 60%),
  linear-gradient(150deg, var(--navy-900), var(--navy-700)); color: #fff; box-shadow: var(--shadow-lg); }
.cta-band h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
.cta-band p { color: rgba(206, 224, 250, .8); margin: 14px auto 30px; max-width: 640px; }
.cta-band .hero-actions { justify-content: center; margin-top: 0; }

/* 页脚 */
.site-footer { background: var(--navy-950); color: #9db3d6; padding: 64px 0 30px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 44px; }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 700; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #9db3d6; }
.site-footer a:hover { color: var(--cyan-300); }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; stroke: var(--cyan-300); fill: none; stroke-width: 1.8; flex-shrink: 0; margin-top: 4px; stroke-linecap: round; stroke-linejoin: round; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: #6d84ab; font-size: 13px; }

/* 内页页头 */
.page-hero { position: relative; color: #fff; padding: 158px 0 72px; overflow: hidden;
  background:
    radial-gradient(900px 420px at 85% -20%, rgba(43, 123, 243, .35), transparent 60%),
    linear-gradient(155deg, var(--navy-950) 0%, var(--navy-900) 55%, #0d2f60 100%); }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.13) 1px, transparent 1px); background-size: 34px 34px; mask-image: radial-gradient(700px 380px at 80% 20%, rgba(0,0,0,.45), transparent 75%); -webkit-mask-image: radial-gradient(700px 380px at 80% 20%, rgba(0,0,0,.45), transparent 75%); }
.page-hero .container { position: relative; }
.page-hero .eyebrow { color: var(--cyan-300); }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 44px); font-weight: 800; }
.page-hero p { margin-top: 14px; max-width: 720px; color: rgba(210, 226, 250, .8); font-size: 16.5px; }
.breadcrumb { margin-top: 18px; font-size: 13.5px; color: rgba(190, 210, 240, .6); }
.breadcrumb a { color: rgba(210, 226, 250, .85); }

/* 产品区块 */
.product-block { padding: 64px 0; border-bottom: 1px solid var(--line); }
.product-block:last-of-type { border-bottom: 0; }
.product-block > .container { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.product-block .figure { position: sticky; top: 96px; }
.product-block h2 { font-size: 26px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.product-block h2 .tag { position: static; }
.product-sub { color: var(--muted); font-size: 15px; margin-bottom: 18px; }
.spec-list li { display: flex; gap: 10px; padding: 11px 0; border-bottom: 1px dashed #e6ecf5; font-size: 14.5px; }
.spec-list li:last-child { border-bottom: 0; }
.spec-list b { flex-shrink: 0; color: var(--ink-900); min-width: 108px; font-weight: 700; }

/* 价格 */
.price-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.price-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-sm); position: relative; }
.price-card.featured { border-color: var(--brand-500); box-shadow: 0 16px 44px rgba(29, 95, 214, .16); }
.price-card .pop { position: absolute; top: -13px; left: 30px; background: linear-gradient(135deg, var(--brand-500), var(--cyan-400)); color: #04101f; font-size: 12px; font-weight: 800; padding: 4px 14px; border-radius: 999px; }
.price-card h3 { font-size: 18px; }
.price-line { margin: 14px 0 6px; font-size: 34px; font-weight: 800; color: var(--ink-900); font-variant-numeric: tabular-nums; }
.price-line small { font-size: 14px; font-weight: 600; color: var(--muted); }
.price-card .feature-list li { margin-bottom: 8px; font-size: 14px; }

/* 场景卡 */
.scene-card h3 { display: flex; align-items: center; gap: 10px; font-size: 18px; }
.scene-card .pain { font-size: 13.5px; color: #b45309; background: #fff7e6; border-radius: 10px; padding: 8px 12px; margin: 12px 0; }
.scene-card .gain { font-size: 14px; color: var(--ink-500); }

/* 联系页 */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.contact-form-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 14px; font-weight: 700; color: var(--ink-900); margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 15px; border: 1px solid #cdd9ec; border-radius: 11px; font-size: 15px;
  font-family: inherit; color: var(--ink-900); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(43, 123, 243, .15); }
.field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 14px; }

/* 徽章墙 */
.policy-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.policy-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow-sm); }
.policy-item b { display: block; font-size: 15px; color: var(--ink-900); margin-bottom: 4px; }
.policy-item span { font-size: 13.5px; color: var(--muted); }

/* 返回顶部 */
.back-top { position: fixed; right: 26px; bottom: 26px; z-index: 90; width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer; background: var(--brand-600); color: #fff; box-shadow: var(--shadow-md); display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .25s, transform .25s, background .2s; }
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { background: var(--brand-500); }
.back-top svg { width: 20px; height: 20px; stroke: #fff; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

/* 入场动画 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; } .reveal-d2 { transition-delay: .16s; } .reveal-d3 { transition-delay: .24s; } .reveal-d4 { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 640px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .cards-3, .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .product-block > .container { grid-template-columns: 1fr; gap: 32px; }
  .product-block .figure { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .price-cards { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-form-wrap { grid-template-columns: 1fr; }
  .policy-strip { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .menu-btn { display: block; }
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(6, 15, 34, .97); backdrop-filter: blur(16px); padding: 18px 24px 26px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s;
    border-bottom: 1px solid rgba(255,255,255,.12);
  }
  .menu-open .nav { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { color: #fff !important; background: none !important; padding: 13px 8px; font-size: 16px; border-radius: 8px; }
  .nav a:hover { background: rgba(255,255,255,.08) !important; }
  .nav .nav-cta { margin: 10px 8px 0; text-align: center; background: linear-gradient(135deg, var(--brand-500), var(--cyan-400)) !important; color: #04101f !important; }
  .site-header.scrolled .menu-btn span { background: var(--ink-900); }
  .menu-open .site-header { background: rgba(6, 15, 34, .97); }
  .menu-open .site-header .brand { color: #fff; }
  .menu-open .menu-btn span { background: #fff !important; }
  .hero { padding: 140px 0 72px; }
  .section { padding: 66px 0; }
  .cards-2, .cards-3, .cards-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .policy-strip { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 560px) {
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-num { font-size: 24px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .steps { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr; }
  .container { padding: 0 18px; }
}