/* ==========================================================================
   集运管家 · 集运系统 — v2 参照阿里云通义产品页布局
   深圳塔灯网络科技有限公司
   ========================================================================== */

:root {
  --brand: #ff6a00;
  --brand-dark: #e65800;
  --brand-light: #ff8c3a;
  --ink: #181818;
  --ink-2: #333;
  --muted: #6b7280;
  --line: #ececf0;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-tint: #fff6ef;
  --radius: 12px;
  --shadow-sm: 0 2px 10px rgba(0,0,0,.05);
  --shadow: 0 14px 36px rgba(0,0,0,.09);
  --maxw: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif; color: var(--ink); background: var(--bg); line-height: 1.7; font-size: 15px; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 顶部产品导航（通义产品页风格：品牌 + 锚点 tab + 右侧 CTA） */
.pnav { position: sticky; top: 0; z-index: 200; background: #fff; border-bottom: 1px solid var(--line); }
.pnav-inner { display: flex; align-items: center; height: 62px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 9px; font-size: 20px; font-weight: 800; color: var(--ink); letter-spacing: -.5px; flex: none; }
.brand .logo-mark { width: 34px; height: 34px; border-radius: 8px; flex: none; background: linear-gradient(135deg, var(--brand), var(--brand-light)); color: #fff; display: grid; place-items: center; font-size: 16px; font-weight: 800; }
.brand em { font-style: normal; color: var(--brand); }
.pnav-tabs { display: flex; align-items: center; gap: 2px; flex: 1; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.pnav-tabs::-webkit-scrollbar { display: none; }
.pnav-tabs a { flex: none; padding: 8px 14px; font-size: 14.5px; font-weight: 500; color: var(--ink-2); border-radius: 6px; transition: color .2s, background .2s; white-space: nowrap; }
.pnav-tabs a:hover { color: var(--brand); }
.pnav-tabs a.active { color: var(--brand); font-weight: 700; }
.pnav-right { display: flex; align-items: center; gap: 14px; flex: none; }
.pnav-phone { display: flex; align-items: center; gap: 7px; color: var(--ink); font-weight: 700; font-size: 14.5px; white-space: nowrap; }
.pnav-phone svg { width: 18px; height: 18px; stroke: var(--brand); }
.pnav-cta { background: var(--brand); color: #fff; padding: 8px 18px; border-radius: 6px; font-weight: 700; font-size: 14px; white-space: nowrap; }
.pnav-cta:hover { background: var(--brand-dark); }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--ink); cursor: pointer; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; border: none; transition: all .2s; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-outline { background: #fff; color: var(--ink); border: 1px solid #d5d5d8; }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* Hero banner */
.hero { background: linear-gradient(180deg, #fff3ea 0%, #fff 100%); padding: 60px 0 44px; }
.hero-inner { text-align: center; max-width: 860px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: #fff; border: 1px solid #ffd9bd; color: var(--brand-dark); padding: 6px 16px; border-radius: 99px; font-size: 13px; margin-bottom: 22px; }
.hero-badge b { color: var(--brand); }
.hero h1 { font-size: 46px; line-height: 1.22; font-weight: 800; letter-spacing: -1.5px; color: var(--ink); margin-bottom: 16px; }
.hero h1 .hl { color: var(--brand); }
.hero .lead { font-size: 17px; color: var(--muted); max-width: 640px; margin: 0 auto 30px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 48px; justify-content: center; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 32px; font-weight: 800; color: var(--ink); line-height: 1; }
.hero-stats .stat b em { font-style: normal; color: var(--brand); }
.hero-stats .stat span { font-size: 13px; color: var(--muted); }

/* 高亮卡行（通义重磅更新卡样式） */
.hl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.hl-card { display: flex; gap: 14px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: box-shadow .2s, border-color .2s; }
.hl-card:hover { box-shadow: var(--shadow); border-color: #ffd4b3; }
.hl-card .ic { flex: none; width: 44px; height: 44px; border-radius: 11px; background: var(--bg-tint); color: var(--brand); display: grid; place-items: center; font-size: 22px; }
.hl-card b { display: block; font-size: 15px; color: var(--ink); margin-bottom: 2px; }
.hl-card p { font-size: 12.5px; color: var(--muted); line-height: 1.6; }

/* 通用 section */
.section { padding: 68px 0; }
.section-soft { background: var(--bg-soft); }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.sec-head .kicker { display: inline-block; color: var(--brand); font-weight: 700; font-size: 13px; letter-spacing: 2px; margin-bottom: 10px; }
.sec-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -.6px; color: var(--ink); margin-bottom: 12px; }
.sec-head p { color: var(--muted); font-size: 15.5px; }

/* 核心功能卡（体验中心风格） */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 20px; text-align: center; transition: transform .22s, box-shadow .22s, border-color .22s; }
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #ffd4b3; }
.feat-card .ic { width: 58px; height: 58px; margin: 0 auto 14px; border-radius: 16px; background: var(--bg-tint); color: var(--brand); display: grid; place-items: center; font-size: 26px; }
.feat-card h3 { font-size: 16px; color: var(--ink); margin-bottom: 8px; }
.feat-card p { font-size: 13px; color: var(--muted); }

/* 重点功能大区块（模型家族风格：左文案 + 右大视觉） */
.showcase { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: center; padding: 44px 0; }
.showcase + .showcase { border-top: 1px solid var(--line); }
.showcase .tag { display: inline-block; background: var(--bg-tint); color: var(--brand-dark); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 99px; margin-bottom: 14px; }
.showcase h3 { font-size: 28px; font-weight: 800; color: var(--ink); margin-bottom: 12px; }
.showcase p { color: var(--muted); font-size: 15px; margin-bottom: 22px; }
.showcase .points { display: grid; gap: 10px; margin-bottom: 26px; }
.showcase .points li { font-size: 14px; color: var(--ink-2); padding-left: 22px; position: relative; }
.showcase .points li::before { content: ""; position: absolute; left: 0; top: 8px; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }
.showcase .visual { background: linear-gradient(135deg, #fff7f0, #fff); border: 1px solid var(--line); border-radius: 16px; padding: 26px; box-shadow: var(--shadow); }
.showcase .mock { background: #18181b; border-radius: 10px; overflow: hidden; }
.showcase .mock .bar { display: flex; align-items: center; gap: 6px; padding: 9px 13px; background: #26262b; }
.showcase .mock .bar i { width: 9px; height: 9px; border-radius: 50%; background: #ff5f57; }
.showcase .mock .bar i:nth-child(2) { background: #febc2e; }
.showcase .mock .bar i:nth-child(3) { background: #28c840; }
.showcase .mock .bar span { margin-left: auto; color: #8a8a92; font-size: 11px; }
.showcase .mock .body { padding: 16px; display: grid; gap: 10px; }
.showcase .mock .row { display: flex; align-items: center; gap: 10px; background: #26262b; border-radius: 8px; padding: 11px; }
.showcase .mock .row .ic { width: 28px; height: 28px; border-radius: 7px; background: linear-gradient(135deg, var(--brand), var(--brand-light)); flex: none; display: grid; place-items: center; font-size: 14px; }
.showcase .mock .row .ln { flex: 1; height: 8px; border-radius: 4px; background: #3a3a40; }
.showcase .mock .row .pill { background: rgba(255,106,0,.2); color: #ffb27a; font-size: 11px; padding: 3px 9px; border-radius: 99px; }
.showcase.rev .copy { order: 2; }
.showcase.rev .visual { order: 1; }

/* 核心优势（模型优势风格：图标 + 标题 + 要点列表） */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.adv-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; }
.adv-card .ic { width: 50px; height: 50px; border-radius: 13px; background: var(--bg-tint); color: var(--brand); display: grid; place-items: center; font-size: 24px; margin-bottom: 16px; }
.adv-card h3 { font-size: 16px; color: var(--ink); margin-bottom: 10px; }
.adv-card ul li { font-size: 13px; color: var(--muted); padding-left: 18px; position: relative; margin-bottom: 7px; }
.adv-card ul li::before { content: ""; position: absolute; left: 0; top: 8px; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }

/* 适用场景（落地场景风格：卡 + 亮点标签 + 按钮） */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.scene-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; transition: box-shadow .2s, border-color .2s; }
.scene-card:hover { box-shadow: var(--shadow); border-color: #ffd4b3; }
.scene-card .top { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.scene-card .top .ic { width: 44px; height: 44px; border-radius: 11px; background: var(--bg-tint); color: var(--brand); display: grid; place-items: center; font-size: 22px; flex: none; }
.scene-card .top b { font-size: 16px; color: var(--ink); }
.scene-card p { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.scene-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.scene-card .tags span { background: var(--bg-tint); border: 1px solid #ffe0c7; border-radius: 5px; padding: 3px 9px; font-size: 12px; color: var(--brand-dark); }
.scene-card .actions { margin-top: auto; display: flex; gap: 10px; }
.scene-card .actions .btn { padding: 9px 0; font-size: 13.5px; flex: 1; }

/* 认证（安全合规风格） */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cert-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; text-align: center; }
.cert-card .ic { width: 54px; height: 54px; margin: 0 auto 14px; border-radius: 14px; background: var(--bg-tint); color: var(--brand); display: grid; place-items: center; font-size: 25px; }
.cert-card b { display: block; font-size: 15px; color: var(--ink); margin-bottom: 6px; }
.cert-card p { font-size: 12.5px; color: var(--muted); }

/* 客户案例 */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .22s, box-shadow .22s; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.case-card .thumb { height: 90px; background: linear-gradient(135deg, #ff8c3a, #ff6a00); color: #fff; display: grid; place-items: center; font-size: 20px; font-weight: 800; letter-spacing: 2px; }
.case-card .body { padding: 20px; }
.case-card .body .tag { display: inline-block; background: var(--bg-tint); color: var(--brand-dark); font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 99px; margin-bottom: 10px; }
.case-card h3 { font-size: 16px; color: var(--ink); margin-bottom: 7px; }
.case-card p { font-size: 13px; color: var(--muted); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 820px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 10px; background: #fff; overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 18px 20px; font-weight: 600; color: var(--ink); font-size: 15px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--brand); transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 20px 18px; color: var(--muted); font-size: 14px; }

/* CTA banner */
.cta { background: linear-gradient(135deg, #ff8c3a, var(--brand)); color: #fff; text-align: center; padding: 60px 0; }
.cta h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.cta p { color: #ffe8d6; margin-bottom: 26px; }
.cta .btn-white { background: #fff; color: var(--brand); }
.cta .btn-white:hover { background: #fff3ea; }

/* 联系 */
.contact { padding: 68px 0; }
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.contact-info { display: grid; gap: 14px; }
.contact-info .row { display: flex; align-items: center; gap: 14px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; }
.contact-info .row .ic { width: 42px; height: 42px; border-radius: 11px; background: #fff; color: var(--brand); display: grid; place-items: center; flex: none; font-size: 18px; border: 1px solid var(--line); }
.contact-info .row b { display: block; font-size: 13px; color: var(--muted); font-weight: 500; }
.contact-info .row .val { font-size: 17px; font-weight: 700; color: var(--ink); }
.contact-qr { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; text-align: center; box-shadow: var(--shadow); }
.contact-qr img { width: 200px; margin: 0 auto 16px; border-radius: 12px; }
.contact-qr b { display: block; font-size: 18px; color: var(--ink); margin-bottom: 4px; }
.contact-qr p { font-size: 13px; color: var(--muted); }

/* 页脚 */
.footer { background: #14161a; color: #a0a6ad; padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 34px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer p { font-size: 13px; line-height: 1.8; }
.footer ul li { margin-bottom: 9px; font-size: 13px; }
.footer ul li a:hover { color: #fff; }
.footer .brand { color: #fff; margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid #26282d; padding: 20px 0; font-size: 12.5px; color: #7c828a; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.footer-bottom a { color: #a0a6ad; }
.footer-bottom a:hover { color: #fff; }

.float-wx { position: fixed; right: 22px; bottom: 22px; z-index: 300; }
.wx-fab { width: 58px; height: 58px; border-radius: 50%; background: var(--brand); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; line-height: 1.2; text-align: center; cursor: pointer; box-shadow: 0 10px 26px rgba(255,106,0,.4); }
.wx-pop { position: absolute; right: 0; bottom: 70px; width: 230px; background: #fff; border-radius: 16px; box-shadow: 0 20px 50px rgba(0,0,0,.18); border: 1px solid var(--line); padding: 20px; text-align: center; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s; }
.wx-pop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.wx-pop img { width: 150px; margin: 0 auto 12px; border-radius: 10px; }
.wx-pop b { display: block; color: var(--ink); font-size: 14px; }
.wx-pop p { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(4px); z-index: 400; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.show { display: flex; }
.modal { position: relative; background: #fff; border-radius: 18px; max-width: 380px; width: 100%; padding: 34px 30px 28px; text-align: center; box-shadow: 0 40px 90px rgba(0,0,0,.35); animation: mp .25s ease; }
@keyframes mp { from { transform: scale(.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-close { position: absolute; top: 14px; right: 16px; border: none; background: #f2f3f5; color: #555; width: 32px; height: 32px; border-radius: 50%; cursor: pointer; font-size: 16px; }
.modal h3 { color: var(--ink); font-size: 21px; font-weight: 800; margin-bottom: 6px; }
.modal .sub { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.modal-qr { width: 180px; margin: 0 auto 16px; border-radius: 12px; border: 1px solid var(--line); }
.modal-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 11px 15px; margin-bottom: 10px; font-size: 14px; color: var(--muted); }
.modal-row .val { font-weight: 700; color: var(--brand); font-size: 16px; }
.modal .btn-block { margin-top: 6px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 1024px) {
  .feat-grid, .adv-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .hl-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase { grid-template-columns: 1fr; gap: 28px; }
  .showcase.rev .copy { order: 1; }
  .showcase.rev .visual { order: 2; }
}
@media (max-width: 860px) {
  .hero h1 { font-size: 34px; }
  .pnav-phone, .pnav-cta { display: none; }
  .nav-toggle { display: block; }
  .pnav-tabs { display: none; position: absolute; top: 62px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px; flex-direction: column; align-items: stretch; }
  .pnav.open .pnav-tabs { display: flex; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .feat-grid, .adv-grid, .cert-grid, .scene-grid, .hl-grid, .case-grid, .footer-grid { grid-template-columns: 1fr; }
  .sec-head h2 { font-size: 28px; }
  .section { padding: 56px 0; }
  .hero h1 { font-size: 28px; }
  .hero-stats { gap: 24px; }
}

.center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 28px; }