/* ============================================================
   Poseidon Marketing — 黑金主题样式
   结构照搬参考站（一页式 7 板块），配色换成黑底金字。
   ============================================================ */

:root{
  --bg:#070707;            /* 页面底色 */
  --bg-2:#0d0d0f;          /* 交替板块底色 */
  --card:#121214;          /* 卡片底 */
  --card-2:#17171a;
  --line:rgba(212,175,55,.16);   /* 金色细线 */
  --line-2:rgba(255,255,255,.06);
  --text:#f2ecdc;          /* 主文字：暖白 */
  --muted:#a39b86;         /* 次文字 */
  --gold:#d4af37;
  --gold-2:#f3dc8a;
  --gold-3:#9c7a1f;
  --gold-grad:linear-gradient(135deg,#f3dc8a 0%,#d4af37 45%,#9c7a1f 100%);
  --serif:"Cormorant Garamond","Noto Serif SC",Georgia,"Times New Roman",serif;
  --sans:Inter,"Noto Sans SC","Avenir Next",Avenir,"Helvetica Neue",Arial,sans-serif;
  --radius:18px;
  --container:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:.005em;margin:0}
p{margin:0}
::selection{background:rgba(212,175,55,.35)}

/* 中英切换：body[data-lang] 决定显示哪一套文案 */
html[data-lang="en"] .zh{display:none}
html[data-lang="zh"] .en{display:none}
html[data-lang="zh"] body{font-family:"Noto Sans SC",Inter,sans-serif}
html[data-lang="zh"] h1,html[data-lang="zh"] h2,html[data-lang="zh"] h3{font-family:"Noto Serif SC","Cormorant Garamond",serif}

.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- 按钮 ---------- */
.button{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;font-weight:500;font-size:15px;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;cursor:pointer;font-family:inherit}
.button i{font-style:normal;transition:transform .2s}
.button:hover i{transform:translateX(3px)}
.button-primary{background:var(--gold-grad);color:#171205;box-shadow:0 8px 30px rgba(212,175,55,.18)}
.button-primary:hover{transform:translateY(-1px);box-shadow:0 12px 36px rgba(212,175,55,.28)}
.button-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text)}
.button-ghost:hover{border-color:rgba(212,175,55,.5);background:rgba(212,175,55,.06)}

/* ---------- 顶部导航 ---------- */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 32px;background:rgba(7,7,7,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2)}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:34px;height:34px}
.brand-text{display:flex;flex-direction:column;line-height:1;font-family:var(--serif)}
.brand-text b{font-size:17px;letter-spacing:.22em;font-weight:600;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-text small{font-size:9px;letter-spacing:.34em;color:var(--muted);margin-top:4px;font-family:var(--sans)}
.nav-links{display:flex;gap:28px;font-size:14px;color:var(--muted)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--gold-2)}
.nav-right{display:flex;align-items:center;gap:18px}
.lang{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.lang button{background:none;border:0;color:var(--muted);font:inherit;cursor:pointer;padding:4px 2px}
.lang button.active{color:var(--gold-2);font-weight:600}
.nav-cta{padding:11px 18px;font-size:14px}
.burger{display:none;width:40px;height:40px;background:none;border:1px solid var(--line);border-radius:10px;cursor:pointer;position:relative}
.burger span{position:absolute;left:11px;right:11px;height:1.5px;background:var(--gold-2);top:15px}
.burger span+span{top:23px}

/* ---------- 首屏 ---------- */
.hero{position:relative;padding:110px 0 70px;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55}
.glow-a{width:560px;height:560px;left:-140px;top:-160px;background:radial-gradient(circle,rgba(212,175,55,.35),transparent 65%)}
.glow-b{width:640px;height:640px;right:-200px;top:80px;background:radial-gradient(circle,rgba(212,175,55,.18),transparent 65%)}
.waves{position:absolute;left:0;right:0;bottom:-2px;width:100%;height:220px;opacity:.5}
.waves path{fill:none;stroke:rgba(212,175,55,.18);stroke-width:1}
.waves path:nth-child(2){stroke:rgba(212,175,55,.12)}
.waves path:nth-child(3){stroke:rgba(212,175,55,.07)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.25fr .9fr;gap:56px;align-items:center}
.eyebrow{font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--gold);margin-bottom:18px;font-weight:500}
h1{font-size:clamp(44px,6.2vw,80px);line-height:1.02;letter-spacing:-.01em}
h1 em{font-style:italic;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin-top:26px;font-size:18px;color:var(--muted);max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero-note{margin-top:40px;font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}

/* 首屏右侧面板 */
.hero-panel{background:linear-gradient(160deg,rgba(255,255,255,.04),rgba(255,255,255,.015));border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:0 30px 80px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.05)}
.panel-head{display:flex;justify-content:space-between;align-items:center;font-size:11px;letter-spacing:.24em;color:var(--muted)}
.live{display:inline-flex;align-items:center;gap:7px;color:var(--gold-2)}
.live i{width:7px;height:7px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(212,175,55,.18);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(212,175,55,.15)}50%{box-shadow:0 0 0 7px rgba(212,175,55,.04)}}
.panel-platforms{display:flex;gap:8px;margin-top:22px}
.panel-platforms span{flex:1;text-align:center;padding:12px 0;border:1px solid var(--line);border-radius:12px;font-size:12px;letter-spacing:.2em;background:rgba(212,175,55,.04)}
.panel-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px}
.panel-row div{padding:16px;border-radius:14px;background:rgba(0,0,0,.35);border:1px solid var(--line-2)}
.panel-row b{display:block;font-family:var(--serif);font-size:clamp(17px,4.5vw,24px);white-space:nowrap;font-weight:600;color:var(--gold-2)}
.panel-row small{display:block;font-size:10px;letter-spacing:.2em;color:var(--muted);margin-top:4px}
.panel-chart{width:100%;height:90px;margin-top:14px}
.chart-line{stroke:url(#goldGrad);stroke-width:2;stroke-dasharray:600;stroke-dashoffset:600;animation:draw 2.4s .4s ease forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.panel-foot{margin-top:12px;font-size:12px;letter-spacing:.14em;color:var(--muted);text-align:right}

/* 四个数字 */
.stats{position:relative;display:grid;grid-template-columns:repeat(4,1fr);margin-top:70px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats div{padding:26px 22px;border-right:1px solid var(--line-2)}
.stats div:last-child{border-right:0}
.stats b{display:block;font-family:var(--serif);font-size:40px;font-weight:600;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stats span{display:block;margin-top:10px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

/* ---------- 通用板块 ---------- */
.section{padding:110px 0;position:relative}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.section-head{max-width:720px;margin-bottom:56px}
h2{font-size:clamp(32px,4vw,50px);line-height:1.1}
.sub{margin-top:18px;color:var(--muted);font-size:17px}
.num{font-family:var(--serif);font-size:13px;letter-spacing:.2em;color:var(--gold)}

.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{position:relative;display:block;padding:30px 28px 64px;border-radius:var(--radius);background:linear-gradient(180deg,var(--card),var(--card-2));border:1px solid var(--line-2);transition:transform .25s,border-color .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);border-color:rgba(212,175,55,.45);box-shadow:0 24px 60px rgba(0,0,0,.45)}
.card h3{font-size:25px;margin:18px 0 10px}
.card p{color:var(--muted);font-size:15px}
.card .arrow{position:absolute;right:26px;bottom:22px;font-style:normal;color:var(--gold);font-size:20px;transition:transform .25s}
.card:hover .arrow{transform:translateX(5px)}

/* 三大平台 */
.platform{padding:30px 28px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line-2);position:relative;overflow:hidden}
.platform::after{content:"";position:absolute;inset:auto -40px -60px auto;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(212,175,55,.16),transparent 70%)}
.platform-top{display:flex;justify-content:space-between;align-items:center}
.glyph{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-family:var(--serif);font-weight:600;font-size:22px;color:#171205;background:var(--gold-grad)}
.platform small{display:block;margin-top:26px;font-size:11px;letter-spacing:.24em;color:var(--muted)}
.platform h3{font-size:26px;margin-top:8px}
.platform p{margin-top:12px;font-size:14px;color:var(--muted)}

/* 五步流程 */
.track{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.3em;color:var(--gold);position:relative;padding-bottom:16px;margin-bottom:26px}
.track::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,var(--gold),rgba(212,175,55,.08))}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.steps li{padding:26px 22px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line-2)}
.steps h3{font-size:22px;margin:14px 0 10px}
.steps p{color:var(--muted);font-size:14px}

/* 为什么选我们 */
.why-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.why-grid .section-head{margin-bottom:0;position:sticky;top:110px}
.why-list{display:grid;gap:14px}
.why{display:grid;grid-template-columns:52px 1fr;gap:14px;padding:26px 26px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line-2)}
.why h3{font-size:24px}
.why p{margin-top:8px;color:var(--muted);font-size:15px}

/* 客户工作台 */
.workspace{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:48px;border-radius:28px;background:linear-gradient(135deg,rgba(212,175,55,.10),rgba(212,175,55,.02) 60%);border:1px solid var(--line)}
.workspace .button{margin-top:26px}
.checks{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.checks li{padding:16px 18px;border-radius:14px;background:rgba(0,0,0,.35);border:1px solid var(--line-2);font-size:14px;display:flex;align-items:center;gap:10px}
.checks li::before{content:"✓";color:var(--gold-2);font-weight:600}
.compliance{display:grid;grid-template-columns:52px 1fr;gap:18px;margin-top:22px;padding:28px 32px;border-radius:var(--radius);border:1px solid var(--line-2);background:var(--card)}
.compliance .check{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--gold-grad);color:#171205;font-weight:700}
.compliance h3{font-size:22px}
.compliance p{margin-top:8px;color:var(--muted);font-size:14px}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.channels{display:grid;gap:12px;margin-top:34px}
.channel{display:grid;grid-template-columns:48px minmax(0,1fr) 20px;align-items:center;gap:16px;padding:16px 18px;border-radius:14px;background:var(--card);border:1px solid var(--line-2);transition:border-color .2s,transform .2s}
.channel:hover{border-color:rgba(212,175,55,.5);transform:translateX(3px)}
.channel .tag{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(212,175,55,.1);color:var(--gold-2);font-weight:600;font-size:13px;letter-spacing:.06em}
.channel small{display:block;font-size:10px;letter-spacing:.24em;color:var(--muted)}
.channel b{font-weight:500;font-size:15px;overflow-wrap:anywhere}
.channel i{font-style:normal;color:var(--gold)}

.form{display:grid;gap:14px;padding:32px;border-radius:24px;background:var(--card);border:1px solid var(--line)}
.form label{display:grid;gap:8px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.form input,.form select,.form textarea{width:100%;padding:13px 14px;border-radius:12px;background:rgba(0,0,0,.4);border:1px solid var(--line-2);color:var(--text);font:inherit;font-size:15px;letter-spacing:0;text-transform:none;outline:none;transition:border-color .2s}
.form select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--gold) 50%),linear-gradient(135deg,var(--gold) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px;background-repeat:no-repeat}
.form select option{background:#111;color:var(--text)}
.form textarea{resize:vertical;min-height:100px}
.form input:focus,.form select:focus,.form textarea:focus{border-color:rgba(212,175,55,.6)}
.row-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-button{justify-content:center;margin-top:6px}
.form-hint{font-size:12px;color:var(--muted);text-align:center}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
.faq-wrap .section-head{margin-bottom:0;position:sticky;top:110px}
.faq-list{display:grid;gap:10px}
details{border-radius:14px;background:var(--card);border:1px solid var(--line-2);padding:0 22px;transition:border-color .2s}
details[open]{border-color:rgba(212,175,55,.4)}
summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:18px;padding:20px 0;font-family:var(--serif);font-size:21px;font-weight:600}
summary::-webkit-details-marker{display:none}
summary i{font-style:normal;color:var(--gold);font-size:22px;transition:transform .25s}
details[open] summary i{transform:rotate(45deg)}
details p{padding:0 0 20px;color:var(--muted);font-size:15px}

/* 页脚 */
.footer{border-top:1px solid var(--line-2);padding:60px 0 30px;background:#050505}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14px;max-width:320px}
.footer-grid div small{display:block;font-size:10px;letter-spacing:.26em;color:var(--gold);margin-bottom:14px}
.footer-grid div a{display:block;color:var(--muted);font-size:14px;margin-bottom:8px;transition:color .2s}
.footer-grid div a:hover{color:var(--gold-2)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:44px;padding-top:22px;border-top:1px solid var(--line-2);font-size:12px;color:var(--muted)}

/* 右下角 Telegram 浮标 + 提示条 */
.float-tg{position:fixed;right:22px;bottom:22px;width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:var(--gold-grad);box-shadow:0 12px 32px rgba(212,175,55,.35);z-index:40;transition:transform .2s}
.float-tg:hover{transform:scale(1.06)}
.float-tg svg{width:26px;height:26px;fill:#171205}
.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);opacity:0;padding:12px 18px;border-radius:12px;background:#151515;border:1px solid var(--line);color:var(--gold-2);font-size:14px;z-index:60;transition:all .3s;pointer-events:none}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* 滚动浮现 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.delay-1{transition-delay:.1s}.delay-2{transition-delay:.2s}.delay-3{transition-delay:.3s}.delay-4{transition-delay:.4s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.chart-line{animation:none;stroke-dashoffset:0}}

/* ---------- 响应式 ---------- */
@media (max-width:1060px){
  .steps{grid-template-columns:repeat(3,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .hero-grid{grid-template-columns:1fr}
  .hero-panel{max-width:520px}
  .why-grid,.faq-wrap,.contact-grid,.workspace{grid-template-columns:1fr}
  .why-grid .section-head,.faq-wrap .section-head{position:static;margin-bottom:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav{padding:12px 18px}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#0a0a0a;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:16px 22px;border-top:1px solid var(--line-2)}
  .nav-cta{display:none}
  .burger{display:block}
  .hero{padding:70px 0 50px}
  .stats{grid-template-columns:1fr 1fr}
  .stats div:nth-child(2n){border-right:0}
  .stats div{border-bottom:1px solid var(--line-2)}
  .section{padding:72px 0}
  .grid-3,.steps,.checks,.row-2{grid-template-columns:1fr}
  .workspace{padding:28px}
  .form{padding:22px}
  .footer-grid{grid-template-columns:1fr}
}