/* ============================================================
   站点 1（根域名 @）— 靛蓝 · 经典分区卡片风
   设计基调：宝石靛蓝主色 + 左右分栏 Hero + 网格卡片 + 中等圆角柔和阴影
   ============================================================ */

:root {
  --c-primary: #4f46e5;
  --c-primary-deep: #3730a3;
  --c-primary-soft: #eef2ff;
  --c-accent: #06b6d4;
  --c-accent-soft: #ecfeff;
  --c-ink: #11142a;
  --c-body: #41465e;
  --c-muted: #8086a0;
  --c-line: #e6e8f2;
  --c-bg: #ffffff;
  --c-bg-alt: #f6f7fc;
  --c-gold: #f59e0b;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-soft: 0 14px 40px rgba(48, 49, 110, 0.08);
  --shadow-hover: 0 22px 54px rgba(48, 49, 110, 0.16);
  --nav-h: 70px;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Roboto, Helvetica, Arial, sans-serif;
  color: var(--c-body);
  background: var(--c-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color .2s ease; }
ul { list-style: none; }
img { max-width: 100%; }

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

.btn {
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 16px;
  padding: 13px 30px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  outline: none;
}
.btn-main {
  background: linear-gradient(120deg, #6366f1, #4f46e5);
  color: #fff;
  box-shadow: 0 10px 26px rgba(79, 70, 229, .32);
}
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(79, 70, 229, .42); }
.btn-ghost {
  background: var(--c-primary-soft);
  color: var(--c-primary-deep);
  border: 1px solid #d9dcfa;
}
.btn-ghost:hover { background: #e3e6ff; transform: translateY(-2px); }
.btn-line {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}
.btn-line:hover { background: var(--c-primary); color: #fff; }
.btn:disabled { opacity: .75; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ---------- 导航：顶部固定，左 logo 右菜单 ---------- */
.site-head {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
  z-index: 999;
}
.nav { max-width: var(--maxw); height: 100%; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--c-ink); letter-spacing: -.3px; }
.brand svg { width: 34px; height: 34px; }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-list a {
  display: block; padding: 8px 16px; border-radius: 7px;
  font-size: 15px; font-weight: 500; color: var(--c-body);
}
.nav-list a:hover { color: var(--c-primary); background: var(--c-primary-soft); }
.nav-list .current a { color: var(--c-primary); background: var(--c-primary-soft); font-weight: 700; }
.nav-cta {
  background: linear-gradient(120deg, #6366f1, #4f46e5);
  color: #fff !important; padding: 8px 18px; border-radius: 7px; font-weight: 600;
  box-shadow: 0 6px 16px rgba(79,70,229,.28);
}
.nav-cta:hover { background: var(--c-primary-deep) !important; }

main { margin-top: var(--nav-h); }

section { padding: 86px 0; }
.sec-alt { background: var(--c-bg-alt); }
.sec-tag {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--c-accent); margin-bottom: 12px;
}
.sec-title { font-size: 34px; font-weight: 800; color: var(--c-ink); letter-spacing: -.6px; line-height: 1.25; }
.sec-lead { font-size: 18px; color: var(--c-muted); margin-top: 14px; max-width: 720px; }
.center { text-align: center; }
.center .sec-lead { margin-left: auto; margin-right: auto; }

/* ---------- Hero：左右分栏 ---------- */
.hero {
  padding: 70px 0 90px;
  background:
    radial-gradient(900px 380px at 88% 8%, rgba(99,102,241,.10), transparent 60%),
    radial-gradient(700px 360px at 4% 96%, rgba(6,182,212,.08), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero-chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--c-primary-soft); color: var(--c-primary-deep);
  border: 1px solid #dcdffb; padding: 7px 15px; border-radius: 30px; font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero-h1 { font-size: 50px; line-height: 1.12; font-weight: 800; color: var(--c-ink); letter-spacing: -1.4px; }
.hero-h1 em { font-style: normal; background: linear-gradient(120deg, #6366f1, #06b6d4); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { font-size: 19px; color: var(--c-body); margin: 22px 0 30px; max-width: 560px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 22px; display: flex; gap: 22px; flex-wrap: wrap; font-size: 13px; color: var(--c-muted); }
.hero-note b { color: var(--c-primary-deep); }

.hero-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft); padding: 14px;
}
.hero-card .bar { display: flex; gap: 6px; padding: 6px 8px 12px; }
.hero-card .bar i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot1 { background: #ff5f56; } .dot2 { background: #ffbd2e; } .dot3 { background: #27c93f; }
.hero-screen { background: var(--c-bg-alt); border-radius: var(--radius-md); padding: 18px; }
.hero-screen .row { height: 12px; border-radius: 6px; background: #e3e6f4; margin-bottom: 12px; }
.hero-screen .row.title { height: 22px; width: 46%; background: linear-gradient(90deg, #6366f1, #818cf8); }
.hero-screen .blocks { display: flex; gap: 12px; margin-top: 18px; }
.hero-screen .blocks span { flex: 1; height: 78px; border-radius: 10px; }
.bk1 { background: rgba(79,70,229,.10); border: 1px dashed rgba(79,70,229,.4); }
.bk2 { background: rgba(6,182,212,.10); border: 1px dashed rgba(6,182,212,.4); }
.bk3 { background: rgba(245,158,11,.10); border: 1px dashed rgba(245,158,11,.4); }

/* ---------- 统计条 ---------- */
.statbar { background: linear-gradient(120deg, #4338ca, #4f46e5); color: #fff; }
.statbar .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.statbar .item { text-align: center; padding: 8px; }
.statbar .num { font-size: 42px; font-weight: 800; line-height: 1; }
.statbar .lab { font-size: 15px; color: #c7caf6; margin-top: 10px; }

/* ---------- 卡片网格（亮点） ---------- */
.grid-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.fcard {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md);
  padding: 30px 28px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.fcard:hover { transform: translateY(-6px); border-color: #c9ccfb; box-shadow: var(--shadow-hover); }
.fcard .ic { width: 54px; height: 54px; border-radius: 13px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.fcard .ic svg { width: 28px; height: 28px; }
.fcard h3 { font-size: 19px; color: var(--c-ink); margin-bottom: 10px; }
.fcard p { font-size: 15px; color: var(--c-body); }

/* ---------- 功能详解：图文交错 ---------- */
.detail-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 74px; }
.detail-row:last-child { margin-bottom: 0; }
.detail-row:nth-child(even) .detail-text { order: 2; }
.detail-text h3 { font-size: 27px; color: var(--c-ink); margin: 8px 0 14px; }
.detail-text p { font-size: 16px; color: var(--c-body); margin-bottom: 18px; }
.detail-list li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px; font-size: 15px; color: var(--c-ink); }
.detail-list svg { width: 20px; height: 20px; color: var(--c-primary); flex-shrink: 0; margin-top: 2px; }
.detail-vis {
  height: 320px; border-radius: var(--radius-lg); border: 1px solid var(--c-line);
  background: linear-gradient(135deg, #eef0ff, #f7fbff);
  display: flex; align-items: center; justify-content: center;
}

/* ---------- 平台下载 ---------- */
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.plat {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md);
  padding: 30px 22px; text-align: center; box-shadow: var(--shadow-soft);
  transition: transform .25s ease;
}
.plat:hover { transform: translateY(-5px); }
.plat svg.os { width: 46px; height: 46px; margin-bottom: 14px; }
.plat h3 { font-size: 18px; color: var(--c-ink); margin-bottom: 8px; }
.plat p { font-size: 13.5px; color: var(--c-muted); min-height: 42px; margin-bottom: 18px; }
.plat .btn { width: 100%; padding: 11px; font-size: 14.5px; }

/* ---------- 对比表 ---------- */
.tbl-box { border: 1px solid var(--c-line); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-soft); }
.ctable { width: 100%; border-collapse: collapse; }
.ctable th, .ctable td { padding: 17px 22px; text-align: left; border-bottom: 1px solid var(--c-line); font-size: 15px; }
.ctable thead th { background: var(--c-primary-soft); color: var(--c-primary-deep); font-weight: 700; }
.ctable th:nth-child(2), .ctable td:nth-child(2) { background: rgba(79,70,229,.03); color: var(--c-primary-deep); font-weight: 600; }
.ctable tr:last-child td { border-bottom: none; }
.yes { color: var(--c-primary); font-weight: 700; }
.no { color: var(--c-muted); }

/* ---------- 评价 ---------- */
.rev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.rev {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); padding: 26px;
}
.rev .who { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.rev .ava { width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; }
.rev .who h4 { font-size: 15px; color: var(--c-ink); }
.rev .who span { font-size: 12.5px; color: var(--c-muted); }
.stars { display: flex; gap: 2px; color: var(--c-gold); margin-bottom: 12px; }
.stars svg { width: 16px; height: 16px; fill: currentColor; }
.rev p { font-size: 14.5px; color: var(--c-body); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--c-line); border-radius: var(--radius-md); background: #fff; overflow: hidden; }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 20px 24px; font-weight: 600; font-size: 16.5px; color: var(--c-ink);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 24px; color: var(--c-primary); font-weight: 400; transition: transform .25s ease; }
.faq-item details[open] summary::after { transform: rotate(45deg); }
.faq-item details[open] summary { color: var(--c-primary); }
.faq-a { padding: 0 24px 22px; font-size: 15px; color: var(--c-body); }

/* ---------- 下载页专属 ---------- */
.dl-hero { background: linear-gradient(135deg, #eef2ff, #f5fbff); padding: 70px 0; }
.dl-main { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.dl-meta { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 26px; }
.dl-meta span { background: #fff; border: 1px solid var(--c-line); border-radius: 30px; padding: 7px 16px; font-size: 13.5px; color: var(--c-body); }
.dl-meta b { color: var(--c-primary-deep); }
.dl-shield {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-soft);
}
.dl-shield h3 { font-size: 18px; color: var(--c-ink); margin: 10px 0; }
.dl-shield ul li { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: var(--c-body); margin-bottom: 10px; }
.dl-shield svg { width: 18px; height: 18px; color: var(--c-primary); flex-shrink: 0; margin-top: 2px; }

.steps { counter-reset: st; display: grid; gap: 18px; max-width: 820px; margin: 0 auto; }
.step { display: flex; gap: 18px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); padding: 22px 24px; }
.step::before {
  counter-increment: st; content: counter(st); flex-shrink: 0;
  width: 38px; height: 38px; border-radius: 50%; background: var(--c-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.step h4 { font-size: 17px; color: var(--c-ink); margin-bottom: 6px; }
.step p { font-size: 14.5px; color: var(--c-body); }

.req-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.req-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); padding: 26px; }
.req-card h4 { font-size: 17px; color: var(--c-ink); margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.req-card svg { width: 22px; height: 22px; }
.req-card dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; font-size: 14.5px; }
.req-card dt { color: var(--c-muted); }
.req-card dd { color: var(--c-ink); font-weight: 500; }

.logs { max-width: 820px; margin: 0 auto; }
.log { display: flex; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--c-line); }
.log:last-child { border-bottom: none; }
.log .v { flex-shrink: 0; width: 150px; }
.log .v b { display: block; font-size: 17px; color: var(--c-primary-deep); }
.log .v time { font-size: 13px; color: var(--c-muted); }
.log ul li { font-size: 14.5px; color: var(--c-body); margin-bottom: 6px; padding-left: 16px; position: relative; }
.log ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); }

/* ---------- 中文页专属 ---------- */
.article { max-width: 820px; margin: 0 auto; }
.article h2 { font-size: 26px; color: var(--c-ink); margin: 40px 0 14px; }
.article h3 { font-size: 20px; color: var(--c-primary-deep); margin: 26px 0 10px; }
.article p { font-size: 16.5px; color: var(--c-body); margin-bottom: 16px; }
.article ul.kv { margin: 8px 0 18px; }
.article ul.kv li { padding-left: 24px; position: relative; margin-bottom: 10px; font-size: 16px; }
.article ul.kv li::before { content: "▹"; position: absolute; left: 0; color: var(--c-primary); }
.cta-band {
  margin: 50px auto 0; max-width: 820px; text-align: center;
  background: linear-gradient(120deg, #4f46e5, #06b6d4); color: #fff;
  border-radius: var(--radius-lg); padding: 46px 30px;
}
.cta-band h3 { font-size: 26px; margin-bottom: 12px; }
.cta-band p { color: #e4e7ff; margin-bottom: 24px; }
.cta-band .cta-link {
  display: inline-flex; align-items: center; gap: 8px; background: #fff; color: var(--c-primary-deep);
  font-weight: 700; padding: 14px 34px; border-radius: 30px; font-size: 16px;
}
.cta-band .cta-link:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,.18); }

/* ---------- 页脚 ---------- */
.site-foot { background: #11142a; color: #aab; padding: 56px 0 30px; }
.foot-safe { display: inline-flex; align-items: center; gap: 8px; background: rgba(34,197,94,.12); color: #4ade80; border: 1px solid rgba(34,197,94,.25); padding: 10px 22px; border-radius: 30px; font-weight: 600; font-size: 14.5px; }
.foot-safe svg { width: 18px; height: 18px; }
.foot-warn { margin: 22px 0; line-height: 1.8; color: #8186a8; font-size: 14px; max-width: 820px; }
.foot-copy { border-top: 1px solid #262a45; padding-top: 22px; color: #5f6488; font-size: 13px; }
.site-foot .wrap { display: flex; flex-direction: column; align-items: center; text-align: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .grid-cards, .rev-grid { grid-template-columns: repeat(2, 1fr); }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-row { grid-template-columns: 1fr; gap: 28px; margin-bottom: 50px; }
  .detail-row:nth-child(even) .detail-text { order: 0; }
  .dl-main { grid-template-columns: 1fr; }
  .statbar .wrap { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .req-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  section { padding: 56px 0; }
  .hero-h1 { font-size: 36px; }
  .sec-title { font-size: 27px; }
  .grid-cards, .rev-grid, .plat-grid { grid-template-columns: 1fr; }
  .nav-list a:not(.nav-cta) { padding: 6px 10px; font-size: 13px; }
  .nav-cta { display: none; }
  .brand span { display: none; }
  .log { flex-direction: column; gap: 8px; }
  .log .v { width: auto; }
}