/* BidWare 官网样式 — 深蓝端庄风格 */
:root {
  --navy: #0b2b4b;
  --navy-2: #123a63;
  --blue: #1d63ed;
  --blue-dark: #1450c0;
  --blue-soft: #e8f0fe;
  --red: #d64545;
  --ink: #1f2937;
  --ink-2: #55677a;
  --line: #dde5ee;
  --bg: #f5f7fa;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(11, 43, 75, .08);
  --shadow-lg: 0 10px 32px rgba(11, 43, 75, .14);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--navy);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: .5px; }
.brand-sub { font-size: 12px; color: rgba(255, 255, 255, .65); margin-left: 2px; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  color: rgba(255, 255, 255, .85); font-size: 15px;
  padding: 8px 14px; border-radius: 6px; transition: .15s;
}
.nav-links a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.nav-links a.active { background: var(--blue); color: #fff; }
.nav-cta {
  background: var(--blue); color: #fff !important; font-weight: 600;
  padding: 8px 18px !important; border-radius: 6px;
}
.nav-cta:hover { background: var(--blue-dark); }
.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 22px; height: 2px;
  background: #fff; position: absolute; left: 9px; transition: .2s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -7px; left: 0; }
.nav-toggle span::after { top: 7px; left: 0; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 60%, #17497c 100%);
  color: #fff; padding: 88px 0 96px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -140px; top: -140px;
  width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 99, 237, .35), transparent 70%);
}
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 2px;
  color: #9dc1ff; border: 1px solid rgba(157, 193, 255, .4);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { font-size: 42px; line-height: 1.25; font-weight: 700; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: #7fb0ff; }
.hero p.lead { font-size: 17px; color: rgba(255, 255, 255, .82); margin-bottom: 30px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points {
  display: flex; gap: 28px; margin-top: 36px; flex-wrap: wrap;
  font-size: 14px; color: rgba(255, 255, 255, .75);
}
.hero-points span::before { content: "✓"; color: #6ee7a0; margin-right: 6px; font-weight: 700; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 8px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .15s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn-outline { background: #fff; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover { background: var(--blue-soft); color: var(--blue-dark); }
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* Hero 产品模拟图 */
.hero-visual { position: relative; }
.mock-window {
  background: #fff; border-radius: 12px; box-shadow: var(--shadow-lg);
  overflow: hidden; color: var(--ink); font-size: 13px;
}
.mock-bar {
  display: flex; align-items: center; gap: 6px;
  background: var(--navy); padding: 10px 14px;
}
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: #47596e; }
.mock-bar i:first-child { background: var(--red); }
.mock-bar i:nth-child(2) { background: #e6a23c; }
.mock-bar i:nth-child(3) { background: #67c23a; }
.mock-bar b { color: rgba(255, 255, 255, .8); font-size: 12px; font-weight: 500; margin-left: 8px; }
.mock-body { display: grid; grid-template-columns: 1fr 1fr; }
.mock-pane { padding: 14px 16px; }
.mock-pane + .mock-pane { border-left: 1px solid var(--line); }
.mock-pane h5 {
  font-size: 12px; color: var(--ink-2); font-weight: 600; margin-bottom: 10px;
  display: flex; justify-content: space-between;
}
.mock-line { height: 9px; border-radius: 4px; background: #e6ebf2; margin-bottom: 9px; }
.mock-line.hit { background: #cfe4ff; outline: 1px solid #9cc4fb; }
.mock-line.w60 { width: 60%; } .mock-line.w80 { width: 80%; }
.mock-line.w45 { width: 45%; } .mock-line.w70 { width: 70%; }
.mock-foot {
  border-top: 1px solid var(--line); padding: 10px 16px;
  display: flex; justify-content: space-between; color: var(--ink-2); font-size: 12px;
  background: #fafcff;
}
.mock-foot b { color: var(--red); }
.hero-badge {
  position: absolute; right: -14px; bottom: -18px;
  background: var(--red); color: #fff; font-size: 13px; font-weight: 600;
  padding: 8px 16px; border-radius: 8px; box-shadow: var(--shadow-lg);
}

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head .tag {
  color: var(--blue); font-size: 14px; font-weight: 700; letter-spacing: 2px;
}
.section-head h2 { font-size: 32px; margin: 10px 0 14px; color: var(--navy); }
.section-head p { color: var(--ink-2); font-size: 16px; }

/* 产品卡片 */
.product-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow); display: flex; flex-direction: column;
  position: relative; overflow: hidden;
}
.product-card.pro { border-color: var(--blue); border-width: 2px; }
.product-card .ribbon {
  position: absolute; top: 18px; right: -34px; transform: rotate(35deg);
  background: var(--blue); color: #fff; font-size: 12px; font-weight: 600;
  padding: 4px 40px;
}
.product-card .p-icon {
  width: 52px; height: 52px; border-radius: 12px; margin-bottom: 18px;
}
.product-card h3 { font-size: 22px; color: var(--navy); margin-bottom: 4px; }
.product-card .p-en { color: var(--ink-2); font-size: 13px; letter-spacing: 1px; margin-bottom: 14px; }
.product-card p.desc { color: var(--ink-2); font-size: 15px; margin-bottom: 18px; }
.product-card ul { list-style: none; margin-bottom: 26px; flex: 1; }
.product-card li {
  padding: 7px 0 7px 26px; position: relative; font-size: 14.5px; color: var(--ink);
}
.product-card li::before {
  content: "✓"; position: absolute; left: 0; top: 7px;
  color: var(--blue); font-weight: 700;
}
.product-card .card-actions { display: flex; gap: 12px; }

/* 能力网格 */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px; box-shadow: var(--shadow);
}
.feature-card .f-icon {
  width: 44px; height: 44px; border-radius: 10px; background: var(--blue-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.feature-card .f-icon svg { width: 24px; height: 24px; stroke: var(--blue); }
.feature-card h4 { font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--ink-2); }
.feature-card .f-tag {
  display: inline-block; margin-top: 12px; font-size: 12px; color: var(--blue);
  background: var(--blue-soft); padding: 2px 10px; border-radius: 999px;
}
.feature-card .f-tag.pro { color: #fff; background: var(--red); }
.feature-card .f-tag.ai { color: #fff; background: var(--navy); }

/* 视频介绍 */
.video-tabs { display: flex; gap: 10px; justify-content: center; margin-bottom: 34px; flex-wrap: wrap; }
.video-tabs button {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 8px 22px; font-size: 14px; cursor: pointer; color: var(--ink-2); transition: .15s;
}
.video-tabs button:hover { border-color: var(--blue); color: var(--blue); }
.video-tabs button.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.video-card video { width: 100%; aspect-ratio: 16 / 9; background: #000; display: block; }
.video-card .vc-body { padding: 16px 18px 20px; }
.video-card .vc-body .f-tag { margin: 0 0 10px; }
.video-card h4 { font-size: 15.5px; color: var(--navy); margin-bottom: 6px; }
.video-card p { font-size: 13.5px; color: var(--ink-2); }
.video-empty { text-align: center; color: var(--ink-2); font-size: 14.5px; padding: 30px 0; }

/* 流程步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
.step { text-align: center; padding: 0 12px; position: relative; }
.step .num {
  width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 50%;
  background: var(--navy); color: #fff; font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.step h4 { font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-2); }

/* 对比表 */
.compare-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
table.compare {
  width: 100%; border-collapse: collapse; background: #fff; font-size: 14px;
  min-width: 820px;
}
table.compare th, table.compare td { padding: 14px 20px; text-align: left; }
table.compare thead th {
  background: var(--navy); color: #fff; font-weight: 600; font-size: 15px;
}
table.compare thead th:first-child { border-radius: 0; }
table.compare tbody tr { border-bottom: 1px solid var(--line); }
table.compare tbody tr:nth-child(even) { background: #f8fafc; }
table.compare td:first-child { color: var(--ink); font-weight: 600; }
table.compare .yes { color: #1a9e5c; font-weight: 700; }
table.compare .no { color: #b3bfcc; }
table.compare .pro-col { background: rgba(29, 99, 237, .05); }

/* CTA 横幅 */
.cta-band { background: var(--navy); color: #fff; padding: 64px 0; }
.cta-band .container {
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.cta-band h2 { font-size: 28px; margin-bottom: 8px; }
.cta-band p { color: rgba(255, 255, 255, .75); }

/* 页脚 */
.site-footer { background: #081f38; color: rgba(255, 255, 255, .7); padding: 52px 0 28px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
.footer-grid h5 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { color: rgba(255, 255, 255, .7); }
.footer-grid a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: #fff; }
.footer-brand img { width: 32px; height: 32px; border-radius: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 22px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px;
}

/* ---------- 产品页 ---------- */
.page-hero { background: linear-gradient(160deg, var(--navy), var(--navy-2)); color: #fff; padding: 72px 0; }
.page-hero .crumb { font-size: 13px; color: rgba(255, 255, 255, .6); margin-bottom: 16px; }
.page-hero .crumb a { color: rgba(255, 255, 255, .8); }
.page-hero h1 { font-size: 36px; margin-bottom: 14px; }
.page-hero p.lead { font-size: 16.5px; color: rgba(255, 255, 255, .82); max-width: 720px; margin-bottom: 26px; }
.page-hero .hero-actions { margin-top: 4px; }
.ver-chip {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 1px;
  padding: 3px 12px; border-radius: 999px; margin-bottom: 14px;
  background: rgba(255, 255, 255, .14); color: #cfe0ff;
}
.ver-chip.pro { background: var(--red); color: #fff; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.split h3, .section h3.block-title { font-size: 22px; color: var(--navy); margin-bottom: 16px; }
.check-list { list-style: none; }
.check-list li { padding: 9px 0 9px 30px; position: relative; font-size: 15px; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 9px; width: 20px; height: 20px;
  background: var(--blue-soft); color: var(--blue); border-radius: 50%;
  font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.check-list li b { color: var(--navy); }

.code-block {
  background: #0d2136; color: #d7e6f7; border-radius: var(--radius);
  padding: 20px 22px; font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 13.5px; line-height: 1.8; overflow-x: auto; position: relative;
}
.code-block .c { color: #6d8ba8; }
.code-block .k { color: #7fb0ff; }
.copy-btn {
  position: absolute; top: 10px; right: 10px; background: rgba(255, 255, 255, .1);
  color: #cfe0ff; border: 0; border-radius: 6px; font-size: 12px; padding: 4px 10px; cursor: pointer;
}
.copy-btn:hover { background: rgba(255, 255, 255, .2); }

.format-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.format-chips span {
  background: #fff; border: 1px solid var(--line); border-radius: 6px;
  padding: 6px 14px; font-size: 13px; color: var(--ink-2); box-shadow: var(--shadow);
}

/* 下载页 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.dl-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
}
.dl-card header { background: var(--navy); color: #fff; padding: 22px 26px; display: flex; align-items: center; gap: 14px; }
.dl-card header img { width: 42px; height: 42px; border-radius: 10px; }
.dl-card header h3 { font-size: 19px; }
.dl-card header small { display: block; color: rgba(255, 255, 255, .65); font-size: 12.5px; }
.dl-card .dl-body { padding: 24px 26px; flex: 1; }
.dl-card .dl-body ul { list-style: none; margin-bottom: 20px; }
.dl-card .dl-body li { font-size: 14px; color: var(--ink-2); padding: 5px 0; }
.dl-card .dl-body li b { color: var(--ink); }
.dl-meta { display: flex; gap: 18px; font-size: 13px; color: var(--ink-2); margin-bottom: 18px; flex-wrap: wrap; }
.dl-meta span { background: var(--bg); border-radius: 6px; padding: 4px 10px; }

.faq-item { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; margin-bottom: 14px; box-shadow: var(--shadow); }
.faq-item summary {
  cursor: pointer; padding: 18px 22px; font-size: 15.5px; font-weight: 600; color: var(--navy);
  list-style: none; position: relative; padding-right: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-size: 20px; color: var(--blue); transition: .2s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item .faq-body { padding: 0 22px 20px; color: var(--ink-2); font-size: 14.5px; }

/* 变更日志 */
.changelog { border-left: 3px solid var(--blue); padding-left: 26px; margin-left: 6px; }
.changelog .cl-item { position: relative; padding-bottom: 26px; }
.changelog .cl-item::before {
  content: ""; position: absolute; left: -33px; top: 6px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 4px var(--blue-soft);
}
.changelog .cl-ver { font-size: 17px; font-weight: 700; color: var(--navy); }
.changelog .cl-date { font-size: 13px; color: var(--ink-2); margin: 2px 0 8px; }
.changelog ul { list-style: disc; padding-left: 20px; color: var(--ink-2); font-size: 14.5px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-links a { padding: 8px 10px; font-size: 14px; }
  .brand-sub { display: none; }
}
@media (max-width: 960px) {
  .hero-grid, .product-cards, .split, .dl-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid, .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
  .hero-visual { max-width: 560px; }
}
@media (max-width: 680px) {
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--navy); flex-direction: column; align-items: stretch;
    padding: 12px 20px 20px; gap: 6px; border-bottom: 1px solid rgba(255, 255, 255, .1);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .feature-grid, .steps, .video-grid { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 72px; }
  .hero h1 { font-size: 29px; }
  .section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; }
}