/* ==========================================================================
   STARTRADER 外汇中文站  ·  startrader-zh.com
   品牌还原配色：深藏青底 + 品牌红，本土化中文字体
   ========================================================================== */

:root{
  --ink:#0B1A2B;        /* 主深色面 */
  --ink-2:#12243A;      /* 次级深色面板 */
  --ink-3:#1B3350;      /* 深色描边/分隔 */
  --red:#E2222B;        /* 品牌红，主按钮与强调 */
  --red-deep:#B81720;   /* 按钮悬停 */
  --paper:#FFFFFF;
  --mist:#F4F6F9;       /* 浅色分区底 */
  --line:#E3E8EF;       /* 浅色描边 */
  --muted:#5B6B7E;      /* 次级文字 */
  --ink-text:#0E2034;   /* 浅底正文 */
  --gold:#C29A3B;       /* 极克制的荣誉点缀 */
  --slate:#8294A6;      /* 深底次级文字 */

  --maxw:1180px;
  --radius:14px;
  --shadow:0 18px 48px -28px rgba(11,26,43,.45);

  --sans:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei",
         "Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC",
         "Heiti SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  color:var(--ink-text);
  background:var(--paper);
  line-height:1.75;
  font-size:16px;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 通用排版 ---------- */
h1,h2,h3{line-height:1.3;letter-spacing:.005em;font-weight:800}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5em;
  font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--red);text-transform:uppercase;
}
.eyebrow::before{
  content:"";width:22px;height:2px;background:var(--red);display:inline-block;
}
.lead{font-size:17px;color:var(--muted);max-width:62ch}

/* ---------- 顶部导航 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,26,43,.96);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--ink-3)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;
  display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand svg{width:30px;height:30px}
.brand b{color:#fff;font-size:20px;font-weight:800;letter-spacing:.06em}
.brand span{color:var(--slate);font-size:13px;font-weight:600;
  padding-left:9px;margin-left:2px;border-left:1px solid var(--ink-3);letter-spacing:.02em}

.menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.menu a{color:#D7DEE7;font-size:15px;font-weight:600;
  padding:9px 14px;border-radius:9px;transition:color .15s,background .15s}
.menu a:hover{color:#fff;background:var(--ink-2)}
.menu a.active{color:#fff}
.menu a.active::after{content:"";display:block;height:2px;background:var(--red);
  margin-top:5px;border-radius:2px}

.btn-open{
  margin-left:8px;flex-shrink:0;
  background:var(--red);color:#fff;font-weight:700;font-size:15px;
  padding:10px 20px;border-radius:10px;letter-spacing:.02em;
  transition:background .15s,transform .15s;white-space:nowrap;
}
.btn-open:hover{background:var(--red-deep);transform:translateY(-1px)}

/* 移动端菜单（纯 CSS，无脚本） */
.nav-toggle,.nav-check{display:none}
.nav-toggle{width:42px;height:42px;border-radius:9px;cursor:pointer;
  align-items:center;justify-content:center;border:1px solid var(--ink-3)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:20px;height:2px;background:#fff;position:relative}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-weight:700;
  font-size:16px;padding:13px 26px;border-radius:11px;transition:.15s;cursor:pointer}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-deep);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid var(--ink-3)}
.btn-ghost:hover{border-color:#fff}
.btn .arw{font-size:.9em;transform:translateY(.5px)}

/* ---------- 英雄区 ---------- */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 90% at 88% -10%,rgba(226,34,43,.20),transparent 55%),
    radial-gradient(90% 80% at 0% 120%,rgba(27,51,80,.7),transparent 60%)}
.hero-grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;mask-image:linear-gradient(180deg,#000 35%,transparent)}
.hero-inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;
  padding:74px 22px 84px;display:grid;grid-template-columns:1.15fr .85fr;
  gap:40px;align-items:center}
.hero h1{font-size:clamp(30px,4.4vw,50px);font-weight:800;letter-spacing:.01em}
.hero h1 .hl{color:var(--red)}
.hero p{margin-top:20px;color:#C6D0DB;font-size:18px;max-width:48ch}
.hero-cta{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{margin-top:42px;display:flex;gap:34px;flex-wrap:wrap}
.hero-stats div{min-width:90px}
.hero-stats b{display:block;font-size:26px;color:#fff;font-weight:800;letter-spacing:.02em}
.hero-stats small{color:var(--slate);font-size:13px;letter-spacing:.04em}

/* 英雄区行情曲线 */
.hero-art{position:relative}
.hero-chart{width:100%;height:auto;filter:drop-shadow(0 24px 40px rgba(0,0,0,.35))}
.spark{stroke-dasharray:520;stroke-dashoffset:520;animation:draw 2.2s ease forwards .2s}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- 分区 ---------- */
section{padding:74px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin-top:14px}
.sec-head p{margin-top:14px;color:var(--muted);font-size:17px}
.mist{background:var(--mist)}
.dark{background:var(--ink);color:#fff}
.dark .sec-head p{color:var(--slate)}

/* 优势网格 */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card .ico{width:42px;height:42px;border-radius:11px;background:rgba(226,34,43,.10);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ico svg{width:22px;height:22px;stroke:var(--red)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

/* 深色卡片（产品概览） */
.dark .card{background:var(--ink-2);border-color:var(--ink-3)}
.dark .card:hover{box-shadow:0 22px 50px -30px rgba(0,0,0,.8)}
.dark .card h3{color:#fff}
.dark .card p{color:var(--slate)}
.dark .card .ico{background:rgba(226,34,43,.16)}

/* 产品标签条 */
.asset-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.asset-row span{font-size:14px;font-weight:600;color:#D7DEE7;
  background:var(--ink-2);border:1px solid var(--ink-3);
  padding:7px 14px;border-radius:999px}

/* 账户对比 */
.plans{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.plan{border:1px solid var(--line);border-radius:var(--radius);padding:32px;background:#fff}
.plan.feature{border-color:var(--red);box-shadow:var(--shadow)}
.plan .tag{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--red)}
.plan h3{font-size:24px;margin:6px 0 4px}
.plan .who{color:var(--muted);font-size:15px;margin-bottom:18px}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.plan li{display:flex;gap:10px;font-size:15px;align-items:flex-start}
.plan li::before{content:"";flex-shrink:0;width:18px;height:18px;margin-top:3px;border-radius:50%;
  background:rgba(226,34,43,.10) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23E2222B' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat}

/* 平台列表 */
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:8px}
.feature-list .row{display:flex;gap:16px;padding:22px;border:1px solid var(--line);
  border-radius:var(--radius);background:#fff}
.feature-list .num{font-size:14px;font-weight:800;color:var(--red);
  letter-spacing:.05em;flex-shrink:0;padding-top:2px}
.feature-list h3{font-size:18px;margin-bottom:6px}
.feature-list p{color:var(--muted);font-size:15px}

/* 信任条 */
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.trust .item{padding:26px;border:1px solid var(--ink-3);border-radius:var(--radius);
  background:var(--ink-2)}
.trust .item b{color:#fff;font-size:19px;display:block;margin-bottom:7px}
.trust .item p{color:var(--slate);font-size:15px}

/* 首页 CTA 横幅（仅首页使用） */
.cta-band{background:linear-gradient(105deg,var(--ink),#15314e);color:#fff;
  border-radius:18px;padding:48px 44px;display:flex;align-items:center;
  justify-content:space-between;gap:28px;flex-wrap:wrap;box-shadow:var(--shadow)}
.cta-band h2{font-size:clamp(22px,2.6vw,30px)}
.cta-band p{color:var(--slate);margin-top:8px}

/* 监管标识 */
.regs{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.regs span{font-size:14px;font-weight:700;letter-spacing:.06em;color:#fff;
  border:1px solid var(--ink-3);background:var(--ink-2);padding:9px 18px;border-radius:9px}

/* 文字内容块（分页正文） */
.prose{max-width:760px}
.prose h2{font-size:24px;margin:38px 0 14px}
.prose h2:first-child{margin-top:0}
.prose p{color:#33475c;margin-bottom:16px}
.prose ul{margin:0 0 18px 0;padding-left:20px;color:#33475c}
.prose li{margin-bottom:9px}

/* 二级页头 */
.page-head{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;inset:0;
  background:radial-gradient(80% 120% at 95% 0%,rgba(226,34,43,.18),transparent 55%)}
.page-head .wrap{position:relative;z-index:2;padding:64px 22px 58px}
.page-head h1{font-size:clamp(28px,3.6vw,42px)}
.page-head p{color:#C6D0DB;margin-top:14px;max-width:60ch;font-size:17px}
.crumb{color:var(--slate);font-size:14px;margin-bottom:16px;font-weight:600}
.crumb a:hover{color:#fff}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink);color:#fff;padding-top:60px}
.foot-cols{display:grid;grid-template-columns:1.5fr 1fr 1.1fr;gap:40px;
  padding-bottom:44px;border-bottom:1px solid var(--ink-3)}
.foot .brand{margin-bottom:16px}
.foot-cols p{color:var(--slate);font-size:15px;max-width:42ch}
.foot h4{font-size:14px;letter-spacing:.14em;color:#fff;text-transform:uppercase;
  margin-bottom:18px;font-weight:700}
.foot-list{list-style:none;display:flex;flex-direction:column;gap:11px}
.foot-list li{color:#C6D0DB;font-size:15px}
.foot-contact{list-style:none;display:flex;flex-direction:column;gap:13px}
.foot-contact li{color:#C6D0DB;font-size:15px;display:flex;gap:10px;align-items:flex-start}
.foot-contact svg{width:17px;height:17px;stroke:var(--red);flex-shrink:0;margin-top:4px}
.risk{padding:30px 0 16px;color:var(--slate);font-size:13px;line-height:1.85}
.risk strong{color:#B9C5D1}
.copyright{padding:18px 0 40px;color:var(--slate);font-size:13px;
  border-top:1px solid var(--ink-3);display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:8px}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero-art{order:-1;max-width:440px}
  .g3{grid-template-columns:1fr 1fr}
  .trust{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .nav-toggle{display:flex}
  .menu{position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--ink);border-bottom:1px solid var(--ink-3);
    margin:0;padding:8px 14px 18px;display:none}
  .nav-check:checked ~ .menu{display:flex}
  .menu a{padding:13px 8px;border-radius:0;border-bottom:1px solid var(--ink-3)}
  .menu a.active::after{display:none}
  .menu .btn-open{margin:14px 0 0;text-align:center;justify-content:center;display:flex}
  .nav-inner{justify-content:space-between;gap:14px}
  .g3,.g2,.plans{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr}
  .cta-band{padding:34px 26px}
  section{padding:54px 0}
  .hero-stats{gap:22px}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
  .spark{stroke-dashoffset:0}
}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:4px}