/* ==========================================================================
   海牛海外仓系统 — 深色科技霓虹风格
   ========================================================================== */

:root {
  --bg: #0a0e1c;
  --panel: #111731;
  --panel-2: #1a2144;
  --border: rgba(0, 229, 255, .16);
  --text: #e7edf8;
  --muted: #8b96b8;
  --cyan: #00e5ff;
  --blue: #38bdf8;
  --grad: linear-gradient(135deg, #00e5ff, #38bdf8);
  --radius: 16px;
  --shadow: 0 20px 50px rgba(0,0,0,.45);
  --maxw: 1160px;
}

* { 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; background: var(--bg); color: var(--text); 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; }

/* 头部 */
.site-header { position: sticky; top: 0; z-index: 200; background: rgba(10,14,28,.9); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 14px; flex-wrap: nowrap; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: #fff; letter-spacing: -.5px; white-space: nowrap; flex: none; }
.brand .logo-mark { width: 38px; height: 38px; border-radius: 11px; flex: none; background: var(--grad); color: #0a0e1c; display: grid; place-items: center; font-size: 18px; font-weight: 800; box-shadow: 0 0 22px rgba(0,229,255,.4); }
.brand em { font-style: normal; color: var(--cyan); }
.main-nav > ul { display: flex; align-items: center; gap: 0; flex-wrap: nowrap; }
.main-nav > ul > li { flex: none; }
.main-nav > ul > li > a { display: block; padding: 9px 11px; border-radius: 8px; font-size: 14.5px; font-weight: 600; color: var(--muted); white-space: nowrap; transition: color .2s, background .2s; }
.main-nav > ul > li > a:hover, .main-nav > ul > li > a.active { color: var(--cyan); background: rgba(0,229,255,.08); }
.header-cta { background: var(--grad); color: #0a0e1c; padding: 10px 22px; border-radius: 99px; font-weight: 700; font-size: 14px; white-space: nowrap; box-shadow: 0 0 22px rgba(0,229,255,.35); transition: transform .2s; }
.header-cta:hover { transform: translateY(-2px); }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; color: var(--cyan); cursor: pointer; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 30px; border-radius: 99px; font-size: 15px; font-weight: 700; cursor: pointer; border: none; transition: transform .2s, box-shadow .2s; }
.btn-primary { background: var(--grad); color: #0a0e1c; box-shadow: 0 0 26px rgba(0,229,255,.4); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.05); color: #fff; border: 1px solid var(--border); }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-block { width: 100%; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 100px 0 90px; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(0,229,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,229,255,.05) 1px, transparent 1px); background-size: 44px 44px; }
.hero::after { content: ""; position: absolute; top: -100px; right: -100px; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(0,229,255,.18), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; position: relative; z-index: 2; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(0,229,255,.1); border: 1px solid var(--border); padding: 7px 16px; border-radius: 99px; font-size: 13px; color: var(--cyan); margin-bottom: 22px; }
.hero h1 { font-size: 48px; line-height: 1.2; font-weight: 800; letter-spacing: -1.5px; color: #fff; margin-bottom: 18px; }
.hero h1 .hl { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: 17px; color: var(--muted); max-width: 520px; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-stats { display: flex; gap: 44px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 32px; font-weight: 800; color: #fff; line-height: 1; }
.hero-stats .stat b em { font-style: normal; color: var(--cyan); }
.hero-stats .stat span { font-size: 13px; color: var(--muted); }
.hero-visual { background: rgba(0,229,255,.05); border: 1px solid var(--border); border-radius: 20px; padding: 22px; backdrop-filter: blur(8px); box-shadow: var(--shadow); }
.mock-browser { background: #0a1226; border-radius: 12px; overflow: hidden; }
.mock-browser .bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: #122047; }
.mock-browser .bar i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.mock-browser .bar i:nth-child(2) { background: #febc2e; }
.mock-browser .bar i:nth-child(3) { background: #28c840; }
.mock-browser .bar span { margin-left: auto; color: #5a6a9a; font-size: 12px; }
.mock-body { padding: 16px; display: grid; gap: 10px; }
.mock-row { background: #131f45; border-radius: 9px; padding: 12px; display: flex; align-items: center; gap: 11px; }
.mock-row .dot { width: 30px; height: 30px; border-radius: 8px; background: var(--grad); flex: none; }
.mock-row .ln { flex: 1; height: 8px; border-radius: 4px; background: #24335f; }
.mock-row .pill { background: rgba(0,229,255,.15); color: var(--cyan); font-size: 11px; padding: 3px 9px; border-radius: 99px; }

/* 通用 */
.section { padding: 84px 0; }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.sec-head .kicker { display: inline-block; color: var(--cyan); font-weight: 700; font-size: 13px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px; }
.sec-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -.6px; color: #fff; margin-bottom: 14px; }
.sec-head h2 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sec-head p { color: var(--muted); font-size: 15.5px; }

/* 功能卡 */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; transition: border-color .25s, transform .25s, box-shadow .25s; }
.feat-card:hover { border-color: var(--cyan); transform: translateY(-5px); box-shadow: 0 0 30px rgba(0,229,255,.12); }
.feat-card .ic { width: 54px; height: 54px; border-radius: 14px; background: rgba(0,229,255,.12); color: var(--cyan); display: grid; place-items: center; font-size: 24px; margin-bottom: 16px; }
.feat-card h3 { font-size: 17px; color: #fff; margin-bottom: 8px; }
.feat-card p { font-size: 13.5px; color: var(--muted); }

/* 流程 tabs */
.tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 32px; flex-wrap: wrap; }
.tab-btn { padding: 10px 24px; border-radius: 99px; background: var(--panel); border: 1px solid var(--border); color: var(--muted); font-size: 14.5px; font-weight: 700; cursor: pointer; }
.tab-btn.active { background: var(--grad); color: #0a0e1c; border-color: transparent; }
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.flow-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; }
.flow-card b { display: block; color: var(--cyan); font-size: 15px; margin-bottom: 14px; }
.flow-card ul li { font-size: 13.5px; color: var(--muted); padding: 8px 0; border-bottom: 1px solid var(--border); padding-left: 18px; position: relative; }
.flow-card ul li:last-child { border-bottom: none; }
.flow-card ul li::before { content: ""; position: absolute; left: 0; top: 15px; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); }

/* 特点 */
.spec-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.spec-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; text-align: center; }
.spec-card .ic { width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 15px; background: rgba(0,229,255,.12); color: var(--cyan); display: grid; place-items: center; font-size: 25px; }
.spec-card h3 { font-size: 16px; color: #fff; margin-bottom: 8px; }
.spec-card p { font-size: 13px; color: var(--muted); }

/* 价格 */
.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); max-width: 820px; margin: 0 auto; gap: 20px; align-items: stretch; }
.price-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 26px; text-align: center; display: flex; flex-direction: column; transition: border-color .25s, transform .25s; }
.price-card:hover { border-color: var(--cyan); transform: translateY(-5px); }
.price-card.featured { border-color: var(--cyan); box-shadow: 0 0 30px rgba(0,229,255,.12); }
.price-card h3 { font-size: 18px; color: #fff; margin-bottom: 6px; }
.price-card .amount { font-size: 34px; font-weight: 800; color: var(--cyan); margin-bottom: 20px; }
.price-card ul { text-align: left; margin-bottom: 24px; display: grid; gap: 9px; }
.price-card ul li { font-size: 13.5px; color: var(--muted); padding-left: 20px; position: relative; }
.price-card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--cyan); font-weight: 800; }
.price-card .btn { margin-top: auto; }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 820px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: 12px; background: var(--panel); overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 18px 22px; font-weight: 700; color: #fff; 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(--cyan); transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 22px 18px; color: var(--muted); font-size: 14px; }

/* 联系 */
.contact { padding: 80px 0; background: radial-gradient(600px 300px at 50% 0%, rgba(0,229,255,.1), transparent 70%); }
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.contact h2 { font-size: 34px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.contact h2 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.contact .lead { color: var(--muted); margin-bottom: 28px; }
.contact-info { display: grid; gap: 14px; }
.contact-row { display: flex; align-items: center; gap: 14px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; }
.contact-row .ic { width: 42px; height: 42px; border-radius: 11px; background: rgba(0,229,255,.12); color: var(--cyan); display: grid; place-items: center; flex: none; font-size: 18px; }
.contact-row b { display: block; font-size: 13px; color: var(--muted); font-weight: 500; }
.contact-row .val { font-size: 17px; font-weight: 700; color: #fff; }
.contact-qr { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; text-align: center; }
.contact-qr img { width: 190px; margin: 0 auto 14px; border-radius: 12px; }
.contact-qr b { display: block; color: #fff; font-size: 18px; margin-bottom: 4px; }
.contact-qr p { color: var(--muted); font-size: 13px; }

/* 页脚 */
.footer { border-top: 1px solid var(--border); padding: 44px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1.2fr; gap: 32px; padding-bottom: 30px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer p { font-size: 13px; color: var(--muted); }
.footer ul li { margin-bottom: 9px; font-size: 13px; }
.footer ul li a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 22px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); }
.footer-bottom a { color: var(--muted); }
.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(--grad); color: #0a0e1c; display: grid; place-items: center; font-size: 12px; font-weight: 800; line-height: 1.2; text-align: center; cursor: pointer; box-shadow: 0 0 24px rgba(0,229,255,.4); }
.wx-pop { position: absolute; right: 0; bottom: 70px; width: 230px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 20px; text-align: center; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s; box-shadow: var(--shadow); }
.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: #fff; font-size: 14px; }
.wx-pop p { font-size: 12.5px; color: var(--muted); }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); 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: var(--panel); border: 1px solid var(--border); border-radius: 18px; max-width: 380px; width: 100%; padding: 34px 30px 28px; text-align: center; box-shadow: var(--shadow); 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: var(--panel-2); color: var(--muted); width: 32px; height: 32px; border-radius: 50%; cursor: pointer; font-size: 16px; }
.modal h3 { color: #fff; 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(--border); }
.modal-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 11px 15px; margin-bottom: 10px; font-size: 14px; color: var(--muted); }
.modal-row .val { font-weight: 700; color: var(--cyan); font-size: 16px; }

.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, .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-grid, .price-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .hero { padding: 64px 0 66px; }
  .hero-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
  .main-nav { position: fixed; inset: 0 0 0 auto; width: 82%; max-width: 340px; background: var(--bg); z-index: 250; padding: 24px; transform: translateX(100%); transition: transform .3s; box-shadow: var(--shadow); overflow-y: auto; border-left: 1px solid var(--border); }
  .main-nav.open { transform: translateX(0); }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 240; opacity: 0; visibility: hidden; transition: .3s; }
  .nav-overlay.show { opacity: 1; visibility: visible; }
  .hero-stats { gap: 26px; }
}
@media (max-width: 560px) {
  .feat-grid, .spec-grid, .footer-grid { grid-template-columns: 1fr; }
  .sec-head h2 { font-size: 28px; }
  .section { padding: 60px 0; }
  .hero h1 { font-size: 28px; }
}

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