/* ===========================================================
   Swissquote 外汇中文站 — 共享样式
   品牌配色取自 Swissquote 主站：标志红 + 深海军蓝
   设计取向：瑞士国际主义风格（精密细线、克制留白、清晰栅格）
   =========================================================== */

:root{
  --sq-red:#E30613;
  --sq-red-deep:#B80510;
  --sq-navy:#0A2540;
  --sq-navy-deep:#06182B;
  --sq-ink:#16243A;
  --sq-paper:#FFFFFF;
  --sq-mist:#F4F6F9;
  --sq-cloud:#EAEEF3;
  --sq-line:#DDE3EC;
  --sq-muted:#5C6B80;
  --sq-muted-soft:#8593A6;

  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",
    "Microsoft YaHei","微软雅黑","Hiragino Sans GB","Source Han Sans CN",
    "Noto Sans SC","WenQuanYi Micro Hei",sans-serif;

  --maxw:1180px;
  --pad:24px;
  --radius:10px;
}

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

html{scroll-behavior:smooth}

body{
  font-family:var(--font-sans);
  color:var(--sq-ink);
  background:var(--sq-paper);
  line-height:1.75;
  font-size:16px;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{color:inherit;text-decoration:none}

img,svg{display:block;max-width:100%}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ---------- 文字层级 ---------- */
h1,h2,h3{line-height:1.3;font-weight:700;letter-spacing:.005em}
h1{font-size:clamp(30px,5vw,52px)}
h2{font-size:clamp(24px,3.4vw,36px)}
h3{font-size:clamp(18px,2vw,21px)}

.eyebrow{
  font-size:13px;font-weight:600;letter-spacing:.18em;
  color:var(--sq-red);text-transform:uppercase;
  display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--sq-red);display:inline-block}

.lead{font-size:clamp(16px,1.6vw,18px);color:var(--sq-muted);max-width:60ch}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:6px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn-red{background:var(--sq-red);color:#fff}
.btn-red:hover{background:var(--sq-red-deep)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-line{background:transparent;border-color:var(--sq-line);color:var(--sq-ink)}
.btn-line:hover{border-color:var(--sq-navy);background:var(--sq-mist)}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--sq-line);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:19px;letter-spacing:.01em}
.brand .mark{width:30px;height:30px;flex:none}
.brand .name{color:var(--sq-navy)}
.brand .name b{color:var(--sq-red);font-weight:700}

.nav-links{display:flex;gap:26px;margin-left:auto;align-items:center}
.nav-links a{font-size:15px;color:var(--sq-ink);font-weight:500;position:relative;padding:6px 0}
.nav-links a:hover{color:var(--sq-red)}
.nav-links a.active{color:var(--sq-red)}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--sq-red)
}
.nav-cta{margin-left:6px}

.nav-toggle{display:none;margin-left:auto;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--sq-navy);margin:5px 0;transition:.2s}

/* ---------- Hero ---------- */
.hero{
  background:var(--sq-navy-deep);color:#fff;position:relative;overflow:hidden;
}
.hero::before{
  /* 瑞士精密细线栅格暗纹 */
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;
  align-items:center;padding:92px 0 96px}
.hero h1{color:#fff;margin-bottom:22px}
.hero h1 em{font-style:normal;color:var(--sq-red)}
.hero .lead{color:#B9C4D4;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{margin-top:26px;font-size:13px;color:#7E8DA3}

/* Hero 视觉：静态走势卡（非实时数据，纯装饰） */
.hero-card{
  background:linear-gradient(180deg,#0E2C4C 0%,#0A2540 100%);
  border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:26px;
  box-shadow:0 30px 60px -30px rgba(0,0,0,.6);
}
.hero-card .ribbon{display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid rgba(255,255,255,.08);padding-bottom:14px;margin-bottom:18px}
.hero-card .ribbon span{font-size:13px;color:#8FA0B6;letter-spacing:.1em}
.hero-card .ribbon b{color:var(--sq-red);font-size:13px;letter-spacing:.1em}
.spark{width:100%;height:120px}
.pair-row{display:flex;justify-content:space-between;align-items:center;
  padding:13px 0;border-bottom:1px solid rgba(255,255,255,.06);font-size:14px}
.pair-row:last-child{border-bottom:0}
.pair-row .p{color:#D7DEE8;font-weight:600}
.pair-row .t{color:#8FA0B6}
.pair-row .v{color:#fff;font-variant-numeric:tabular-nums}

/* ---------- 通用区块 ---------- */
.section{padding:80px 0}
.section-mist{background:var(--sq-mist)}
.section-navy{background:var(--sq-navy);color:#fff}
.section-head{max-width:62ch;margin-bottom:46px}
.section-navy .lead{color:#B9C4D4}

/* 三栏特性卡 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

.card{
  background:#fff;border:1px solid var(--sq-line);border-radius:var(--radius);
  padding:30px 28px;transition:.18s ease;
}
.section-mist .card{background:#fff}
.card:hover{border-color:var(--sq-navy);transform:translateY(-3px);
  box-shadow:0 18px 40px -28px rgba(10,37,64,.55)}
.card .num{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--sq-red);
  display:block;margin-bottom:14px}
.card h3{margin-bottom:10px}
.card p{color:var(--sq-muted);font-size:15px}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--sq-line);
  border:1px solid var(--sq-line);border-radius:var(--radius);overflow:hidden}
.stats .cell{background:#fff;padding:28px 22px;text-align:center}
.section-navy .stats{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.12)}
.section-navy .stats .cell{background:var(--sq-navy)}
.stats .cell .big{font-size:clamp(26px,3.4vw,38px);font-weight:700;color:var(--sq-navy);
  font-variant-numeric:tabular-nums;line-height:1.1}
.section-navy .stats .cell .big{color:#fff}
.stats .cell .lbl{font-size:13px;color:var(--sq-muted);margin-top:8px}
.section-navy .stats .cell .lbl{color:#9DB0C6}

/* 文图并排 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.split.reverse .col-text{order:2}

/* 列表（带勾） */
.ticks{list-style:none;margin-top:18px}
.ticks li{position:relative;padding-left:30px;margin-bottom:14px;color:var(--sq-ink);font-size:15.5px}
.ticks li::before{content:"";position:absolute;left:0;top:9px;width:16px;height:9px;
  border-left:2.5px solid var(--sq-red);border-bottom:2.5px solid var(--sq-red);
  transform:rotate(-45deg)}
.section-navy .ticks li{color:#D7DEE8}

/* 表格 */
.table{width:100%;border-collapse:collapse;font-size:15px;margin-top:8px}
.table th,.table td{text-align:left;padding:15px 18px;border-bottom:1px solid var(--sq-line)}
.table th{background:var(--sq-mist);color:var(--sq-navy);font-weight:600;font-size:14px;
  letter-spacing:.04em}
.table td{color:var(--sq-ink)}
.table tr:last-child td{border-bottom:0}
.table .num-cell{font-variant-numeric:tabular-nums;font-weight:600}
.table-wrap{border:1px solid var(--sq-line);border-radius:var(--radius);overflow:hidden}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step{position:relative;padding:30px 26px;border:1px solid var(--sq-line);border-radius:var(--radius);
  background:#fff}
.step .idx{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:8px;background:var(--sq-navy);color:#fff;font-weight:700;margin-bottom:16px}
.step h3{margin-bottom:8px}
.step p{color:var(--sq-muted);font-size:15px}

/* 页面标题区（分页面） */
.pagehead{background:var(--sq-navy-deep);color:#fff;padding:64px 0 60px;position:relative;overflow:hidden}
.pagehead::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px}
.pagehead .inner{position:relative}
.pagehead h1{color:#fff;margin-bottom:16px}
.pagehead .lead{color:#B9C4D4}
.crumb{font-size:13px;color:#7E8DA3;margin-bottom:20px;letter-spacing:.04em}
.crumb a:hover{color:#fff}

.prose p{margin-bottom:18px;color:var(--sq-ink)}
.prose p.muted{color:var(--sq-muted)}

/* ---------- 页脚 ---------- */
.footer{background:var(--sq-navy-deep);color:#C6D0DD;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.1fr;gap:48px;padding-bottom:48px}
.footer h4{color:#fff;font-size:15px;font-weight:600;letter-spacing:.06em;margin-bottom:18px}
.footer .fbrand{display:flex;align-items:center;gap:11px;margin-bottom:18px;font-size:19px;font-weight:700}
.footer .fbrand .name{color:#fff}
.footer .fbrand .name b{color:var(--sq-red)}
.footer p{font-size:14px;color:#9DB0C6;line-height:1.85}
.footer ul{list-style:none}
.footer ul li{font-size:14px;color:#9DB0C6;padding:6px 0}
.footer .contact li{display:flex;gap:10px;align-items:flex-start}
.footer .contact .k{color:#7E8DA3;flex:none;min-width:42px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:24px 0;font-size:13px;
  color:#7E8DA3;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}

.risk{background:#06182B;border-top:1px solid rgba(255,255,255,.07);padding:28px 0;
  font-size:12.5px;color:#6E7E93;line-height:1.85}
.risk b{color:#9DB0C6;font-weight:600}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:64px 0 70px}
  .hero-card{order:2}
  .split{grid-template-columns:1fr;gap:32px}
  .split.reverse .col-text{order:0}
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr;gap:36px}
}
@media (max-width:680px){
  .nav-links{
    position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--sq-line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 0;display:none;
    box-shadow:0 20px 40px -24px rgba(10,37,64,.4)
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px var(--pad)}
  .nav-links a.active::after{display:none}
  .nav-links .nav-cta{margin:10px var(--pad) 6px;justify-content:center}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.steps,.stats{grid-template-columns:1fr}
  .section{padding:56px 0}
}