:root{--ink:#142029;--muted:#66747d;--line:#dce3e6;--paper:#f4f6f5;--white:#fff;--red:#c8172c;--red-dark:#971222;--dark:#101820;--coffee:#76502f;--shadow:0 18px 50px rgba(17,31,39,.11)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei UI","PingFang SC","Noto Sans SC","Segoe UI",sans-serif;line-height:1.65}body.modal-open{overflow:hidden}a{color:inherit}.shell{width:min(1160px,calc(100% - 40px));margin:auto}.skip-link{position:fixed;left:12px;top:-60px;z-index:100;background:#fff;padding:10px 14px}.skip-link:focus{top:12px}.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.topbar-inner{height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--red);color:#fff;font:800 24px/1 Arial}.brand strong,.brand small{display:block}.brand strong{font-size:16px}.brand small{color:var(--muted);font-size:11px;letter-spacing:.08em}.nav{display:flex;align-items:center;gap:24px}.nav>a{text-decoration:none;font-size:14px;color:#47535b}.nav>a:hover{color:var(--red)}button,.button{font:inherit}.hero{position:relative;overflow:hidden;background:var(--dark);color:#fff;padding:88px 0 96px}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 10% 20%,rgba(200,23,44,.23),transparent 34%),linear-gradient(120deg,transparent 55%,rgba(255,255,255,.04))}.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1.05fr;align-items:center;gap:64px}.eyebrow,.section-index{margin:0 0 12px;color:var(--red);font-size:12px;font-weight:800;letter-spacing:.16em}.hero .eyebrow{color:#ff8593}.hero h1{margin:0;font-size:clamp(40px,5.4vw,72px);line-height:1.08;letter-spacing:-.035em}.hero h1 span{display:block;color:#f3a7af}.lead{max-width:640px;margin:24px 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i:first-child{background:#e26068}.window-bar span{margin-left:auto}.app-preview img{display:block;width:100%;height:auto}.app-preview figcaption{padding:11px 16px;background:#fff;color:var(--muted);font-size:12px}.quick-facts{position:relative;margin-top:-36px}.fact-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.fact-grid>div{padding:22px 24px;border-right:1px solid var(--line)}.fact-grid>div:last-child{border:0}.fact-grid span,.fact-grid strong{display:block}.fact-grid span{color:var(--muted);font-size:12px}.fact-grid strong{margin-top:4px;font-size:16px}.section{padding:100px 0}.section-heading{max-width:680px;margin-bottom:44px}.section h2,.coffee-section h2{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.16;letter-spacing:-.03em}.section-heading>p:last-child{color:var(--muted);font-size:17px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-grid article{min-height:230px;padding:26px;background:#fff;border:1px solid var(--line);transition:.2s}.feature-grid article:hover{transform:translateY(-4px);border-color:#bcc7cc;box-shadow:var(--shadow)}.feature-number{font:700 12px/1 Consolas;color:var(--red)}.feature-grid h3{margin:42px 0 9px;font-size:21px}.feature-grid p{margin:0;color:var(--muted);font-size:14px}.section--dark{background:#18232b;color:#fff}.download-layout{display:grid;grid-template-columns:1fr 470px;gap:80px;align-items:center}.section--dark h2{font-size:clamp(34px,4vw,52px)}.download-lead{color:#b6c2c8;font-size:17px}.download-lead code{color:#fff}.support-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.support-list span{padding:6px 10px;border:1px solid #3a4851;border-radius:3px;color:#c8d1d6;font-size:12px}.download-card{padding:28px;background:#fff;color:var(--ink);box-shadow:0 25px 70px rgba(0,0,0,.27)}.download-card-top{display:flex;justify-content:space-between;color:var(--red);font:700 12px/1 Consolas}.download-card h3{margin:20px 0;font-size:24px}.download-card dl{margin:0;border-top:1px solid var(--line)}.download-card dl div{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line)}.download-card dt{color:var(--muted)}.download-card dd{margin:0;font-weight:700}.button--download{width:100%;margin-top:22px;background:var(--red);color:#fff}.hash-box{display:grid;grid-template-columns:auto 1fr auto;align-items:start;gap:8px;margin-top:18px;padding:12px;background:#f1f3f3;font-size:11px}.hash-box code{overflow-wrap:anywhere;color:#45525a}.hash-box button{border:0;background:transparent;color:var(--red);cursor:pointer}.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.steps li{padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.steps>li>span{color:var(--red);font:700 13px Consolas}.steps h3{margin:34px 0 8px}.steps p{margin:0;color:var(--muted);font-size:14px}.warning{display:grid;grid-template-columns:180px 1fr;gap:30px;margin-top:28px;padding:22px 26px;border-left:5px solid var(--red);background:#fff}.warning p{margin:0;color:var(--muted)}.coffee-section{padding:70px 0;background:#e7dfd5}.coffee-cta{display:flex;align-items:center;justify-content:space-between;gap:40px}.coffee-cta p{margin-bottom:0;color:#685d54}.coffee-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:10px 20px;border:0;border-radius:999px;background:linear-gradient(135deg,#68452d,#936238);color:#fff;box-shadow:0 8px 25px rgba(104,69,45,.25);cursor:pointer;font-weight:700}.coffee-button:hover{transform:translateY(-2px)}.coffee-button--small{min-height:36px;padding:7px 14px;font-size:12px}footer{padding:34px 0;background:#0d1419;color:#99a5ac}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px}.footer-inner strong,.footer-inner span{display:block}.footer-inner strong{color:#fff}.footer-inner p{margin:0;text-align:right;font-size:13px}.footer-inner a{color:#d9e1e5}.coffee-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:18px}.coffee-modal[hidden]{display:none}.coffee-modal__backdrop{position:absolute;inset:0;background:rgba(6,10,13,.78);backdrop-filter:blur(5px)}.coffee-modal__panel{position:relative;width:min(780px,100%);max-height:min(92vh,920px);overflow:auto;padding:20px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 18px 50px rgba(23,32,51,.28)}.coffee-modal__panel>h2{margin:0 48px 14px 0;font-size:20px;text-align:left}.coffee-modal__x{position:absolute;right:16px;top:12px;border:0;background:transparent;font-size:30px;color:#7a858b;cursor:pointer}.pay-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.pay-card{overflow:hidden;background:#f8fafc;border:1px solid var(--line);border-radius:8px}.pay-card h3{margin:0;padding:10px 12px;background:#fff;border-bottom:1px solid var(--line);font-size:15px}.pay-card img{display:block;width:100%;height:auto}.toast{position:fixed;left:50%;bottom:28px;z-index:120;transform:translateX(-50%);padding:10px 18px;background:#111;color:#fff;border-radius:5px;box-shadow:var(--shadow)}
@media(max-width:900px){.nav>a{display:none}.hero-grid,.download-layout{grid-template-columns:1fr}.hero{padding-top:66px}.app-preview{max-width:680px}.fact-grid,.feature-grid{grid-template-columns:repeat(2,1fr)}.download-layout{gap:36px}.download-card{max-width:600px}.steps{grid-template-columns:repeat(2,1fr)}.pay-grid{grid-template-columns:1fr}}
@media(max-width:600px){.shell{width:min(100% - 24px,1160px)}.topbar-inner{height:64px}.brand small{display:none}.coffee-button--small{padding:7px 10px}.coffee-button--small span+*{display:none}.hero{padding:54px 0 72px}.hero h1{font-size:40px}.lead{font-size:16px}.hero-actions .button{width:100%}.quick-facts{margin-top:-20px}.fact-grid,.feature-grid,.steps{grid-template-columns:1fr}.fact-grid>div{border-right:0;border-bottom:1px solid var(--line)}.section{padding:70px 0}.download-card{padding:20px}.hash-box{grid-template-columns:1fr auto}.hash-box span{grid-column:1/-1}.warning{grid-template-columns:1fr}.coffee-cta,.footer-inner{align-items:flex-start;flex-direction:column}.footer-inner p{text-align:left}.coffee-modal__panel{padding:18px 14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.douyin-section{padding:72px 0;background:#fff}.douyin-card{display:flex;align-items:center;justify-content:space-between;gap:64px}.douyin-card h2{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.16;letter-spacing:-.03em}.douyin-card>div>p:last-child{color:var(--muted)}.douyin-button{background:linear-gradient(135deg,#20242a,#555d66)}.douyin-modal__panel{width:min(470px,100%)}.douyin-modal__note{text-align:center;color:var(--muted)}.douyin-modal__image{display:block;width:min(360px,100%);height:auto;margin:auto;border-radius:8px}
@media(max-width:700px){.douyin-card{align-items:flex-start;flex-direction:column;gap:28px}}