:root{--ink:#33104d;--purple:#59006b;--bg:#edf4ff;--muted:#71647e;--line:#d9b8df}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif}
button{font:inherit;cursor:pointer}
svg{width:1.2em}
[hidden]{display:none!important}
.noscript{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;margin:0;padding:14px 18px;border-radius:12px;background:#7d1b1b;color:#fff;text-align:center}
.crumb{height:78px;max-width:1440px;margin:auto;padding:0 42px;display:flex;align-items:center;gap:14px}
.crumb button{width:42px;height:42px;border-radius:50%;border:2px solid var(--line);background:#f8f2fa;color:var(--purple);display:grid;place-items:center}
.crumb i{font-style:normal;color:#b8a0be}
.safe{margin-left:auto;display:flex;align-items:center;gap:7px;color:var(--muted);font-size:14px}
.hero{max-width:1440px;margin:auto;padding:70px 48px 55px;display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:end}
.kicker{font-size:12px;letter-spacing:.19em;font-weight:900;color:#892796}
h1{font-size:clamp(54px,7vw,96px);line-height:.96;letter-spacing:-.065em;margin:13px 0 22px}
h1 em{font-style:normal;color:var(--purple)}
.hero p{max-width:700px;color:var(--muted);font-size:18px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.hero-tags span{padding:8px 12px;border-radius:999px;background:#fff8;border:1px solid #59006b17;color:#694e74;font-size:12px;font-weight:800}
.hero-card{background:linear-gradient(135deg,#630073,#32104d);color:#fff;border-radius:28px;padding:30px;display:flex;gap:20px;align-items:flex-start;box-shadow:0 20px 50px #3c084c38}
.hero-card>.usdt-mark{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:#24a279;font-size:36px;font-weight:900;flex:none}
.hero-card-copy{min-width:0}.hero-card-copy>small{opacity:.7;letter-spacing:.08em}.hero-card-copy>h2{font-size:24px;line-height:1.35;margin:7px 0 18px;letter-spacing:-.02em}
.flow-list{display:grid;gap:10px}.flow-list>div{padding:12px 14px;border:1px solid #ffffff21;border-radius:14px;background:#ffffff0c}.flow-list b{display:block;color:#fff;font-size:14px;margin-bottom:4px}.flow-list p{margin:0!important;color:#e8ddeb!important;font-size:12px!important;line-height:1.65!important}
.flow-list>.flow-warning{border-color:#efbf7380;background:#efb84b17}.flow-warning b{color:#ffd88d}
.exchange-tabs{position:sticky;top:8px;z-index:5;max-width:1040px;margin:0 auto 55px;padding:7px;border:2px solid var(--line);border-radius:999px;background:#fcf9fdeb;backdrop-filter:blur(16px);display:grid;grid-template-columns:repeat(3,1fr);box-shadow:0 12px 34px #41114d14}
.exchange-tabs button{border:0;background:transparent;padding:13px;border-radius:999px;color:var(--ink);display:flex;justify-content:center;align-items:center;gap:9px}
.exchange-tabs button>span{width:26px;height:26px;border-radius:7px;color:#fff;display:grid;place-items:center;font-size:12px;font-weight:900}
.exchange-tabs button small{opacity:.45}
.exchange-tabs button.active{background:var(--purple);color:#fff;box-shadow:0 8px 20px #59006b42}
.download-links{max-width:1040px;margin:-35px auto 48px;padding:0 8px}.download-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin:0 6px 12px}.download-heading b{font-size:15px}.download-heading small{color:var(--muted)}.download-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.download-button{min-height:54px;padding:12px 16px;border:1px solid #59006b18;border-radius:15px;background:#fff;color:var(--ink);text-decoration:none;font-weight:900;display:flex;align-items:center;justify-content:center;gap:10px;box-shadow:0 8px 22px #33104d0c;transition:transform .2s,box-shadow .2s}.download-button:hover,.download-button:focus-visible{transform:translateY(-2px);box-shadow:0 12px 28px #33104d1c}.download-button span{padding:5px 7px;border-radius:7px;color:#fff;font-size:10px;letter-spacing:.04em}.download-button.binance span{background:#f0b90b}.download-button.htx span{background:#2874f0}.download-button.okx span{background:#111}
.content{max-width:1440px;margin:auto;padding:0 48px 90px}
.title-row{border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:end;padding-bottom:30px;margin-bottom:30px}
.title-row h2,.safety h2{font-size:40px;margin:8px 0 0}
.guide-tabs{background:#e1e9fa;padding:5px;border-radius:15px;display:flex;gap:4px}
.guide-tabs button{border:0;background:transparent;padding:11px 22px;border-radius:11px;color:var(--muted);font-weight:800;display:grid;gap:3px;text-align:center}
.guide-tabs button small{font-size:10px;font-weight:600;opacity:.7}
.guide-tabs .active{background:#fff;color:var(--purple);box-shadow:0 6px 18px #32104d16}
.triple,.currency-lock{border-radius:20px;margin-bottom:25px;padding:20px 25px;display:flex;align-items:center;gap:14px}
.triple{background:#fff7e9;border:1px solid #edcf8a;color:#755023}
.currency-lock{background:#edfff9;border:1px solid #acdcca;color:#16664e}
.triple>svg,.currency-lock>svg{font-size:28px;flex:none}
.triple>svg{color:#e09300}.currency-lock>svg{color:#1a9e77}
.triple small,.triple b,.currency-lock small,.currency-lock b{display:block}.triple small,.currency-lock small{margin-bottom:5px}
.amount-lock{margin:-10px 0 28px;padding:22px 25px;border:2px solid #ef7d32;border-radius:20px;background:linear-gradient(135deg,#fff6e8,#fff0eb);color:#6e301b;display:flex;align-items:flex-start;gap:15px;box-shadow:0 12px 30px #d85d2520}.amount-lock>svg{width:32px;height:32px;color:#e35e21;flex:none}.amount-lock small{display:block;color:#b34820;font-weight:900;letter-spacing:.08em;margin-bottom:7px}.amount-lock strong{display:block;font-size:clamp(20px,2.3vw,31px);line-height:1.3;color:#5a2416;letter-spacing:-.025em}.amount-lock strong span{display:inline-grid;place-items:center;margin:0 8px;width:35px;height:35px;border-radius:50%;background:#e65c20;color:#fff}.amount-lock p{margin:9px 0 0;color:#8b4d36;line-height:1.65;font-size:14px}
.steps{display:grid;gap:25px}
.step{min-height:520px;display:grid;grid-template-columns:.76fr 1.24fr;background:#ffffffbf;border:1px solid #59006b16;border-radius:30px;overflow:hidden;box-shadow:0 16px 40px #33104d0d}
.critical-step{border:3px solid #ef7d32;box-shadow:0 20px 50px #d85d2526}.critical-step .step-copy{background:linear-gradient(145deg,#fffaf3,#fff1eb)}.critical-step .num{background:#df571f}.critical-step .instruction-figure{background:linear-gradient(145deg,#ffe4c9,#f6e5f3)}.critical-step .instruction-board{border:2px solid #ed8a4a;box-shadow:0 15px 38px #d85d2526}
.step:nth-child(even){grid-template-columns:1.24fr .76fr}.step:nth-child(even) .step-copy{order:2}
.step-copy{padding:58px;display:flex;gap:23px;align-items:flex-start}
.num{width:54px;height:54px;border-radius:50%;background:var(--purple);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:900;flex:none}
.step-copy small{color:#8e3b98;font-weight:800}.step-copy h3{font-size:34px;letter-spacing:-.04em;margin:10px 0 15px}.step-copy p{font-size:17px;line-height:1.85;color:var(--muted);margin:0}
.step-copy em{display:inline-block;margin-top:18px;padding:8px 11px;border-radius:8px;background:#f2e9f4;color:#7b4581;font-style:normal;font-size:12px;line-height:1.6}
.critical-badge{width:max-content;max-width:100%;display:flex;align-items:center;gap:6px;margin-top:10px;padding:7px 10px;border-radius:999px;background:#df571f;color:#fff;font-size:11px;font-weight:900;letter-spacing:.05em}.critical-badge svg{width:15px;height:15px;flex:none}.amount-formula{display:grid;gap:7px;margin-top:18px;padding:16px;border:2px solid #ed8a4a;border-radius:14px;background:#fff}.amount-formula strong{color:#a53b18;font-size:15px;line-height:1.45}.amount-formula strong:first-child{font-size:17px;color:#6c2614}
.mini-checks{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:9px}.mini-checks li{display:flex;align-items:flex-start;gap:8px;color:#64536e;font-size:13px;line-height:1.55}.mini-checks svg{color:#1a9e77;flex:none;margin-top:2px}
figure{margin:0;padding:30px;background:linear-gradient(145deg,#dbe8ff,#f5e7f7);display:flex;flex-direction:column;justify-content:center;align-items:center;min-width:0}
.image-frame{position:relative;width:100%;height:min(68vh,630px);min-height:430px;padding:0;border:1px solid #fff;background:#fff;border-radius:18px;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:0 15px 35px #2e174629}
.image-frame img{width:100%;height:100%;object-fit:contain;display:block}
.zoom{position:absolute;right:12px;bottom:12px;display:flex;align-items:center;gap:7px;padding:9px 12px;border-radius:999px;background:#1d1028df;color:#fff;font-size:12px;font-weight:800;box-shadow:0 5px 18px #0003;opacity:0;transform:translateY(5px);transition:.2s}
.image-frame:hover .zoom,.image-frame:focus-visible .zoom{opacity:1;transform:none}
figcaption{margin-top:12px;font-size:12px;color:#75677b;display:flex;align-items:center;gap:6px}
.instruction-figure{background:linear-gradient(145deg,#e7efff,#f4e8f6)}.instruction-board{width:min(100%,560px);padding:34px;border:1px solid #cdb4d4;border-radius:22px;background:#fff;box-shadow:0 15px 35px #2e174617}.instruction-board>svg{width:42px;height:42px;color:#7f2b8c}.instruction-board>span{display:block;margin-top:15px;color:#8e3b98;font-size:11px;font-weight:900;letter-spacing:.13em}.instruction-board h4{font-size:26px;line-height:1.3;margin:7px 0 18px}.instruction-board ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}.instruction-board li{display:flex;gap:9px;align-items:flex-start;padding:11px 12px;border-radius:12px;background:#f4f0f7;color:#584761;font-size:14px;line-height:1.5}.instruction-board li svg{color:#159772;flex:none;margin-top:2px}.instruction-board>p{margin:18px 0 0;padding-top:16px;border-top:1px solid #eadfed;color:#7b6b82;font-size:12px;line-height:1.7}
.safety{margin-top:45px;border-radius:30px;background:var(--purple);color:#fff;padding:45px}.safety>div:first-child{display:flex;gap:16px;align-items:center}.safety>div:first-child>svg{font-size:45px;color:#e3b5e8}.safety small{color:#ddb9e2}
.checks{display:grid!important;grid-template-columns:repeat(2,1fr);gap:13px!important;margin:25px 0}.checks p{margin:0;background:#ffffff14;border:1px solid #ffffff1f;padding:18px;border-radius:15px}.checks b{color:#e1b8e6;margin-right:12px}
.risk{border-top:1px solid #ffffff2e;padding-top:20px;color:#e8d7eb;line-height:1.7;margin-bottom:0}
footer{border-top:1px solid var(--line);padding:28px max(25px,calc((100vw - 1344px)/2));display:flex;justify-content:space-between;color:#7c6c84;font-size:13px}footer span:last-child{display:flex;gap:5px;align-items:center}
.lightbox{position:fixed;inset:0;z-index:50;background:#100817ee;display:flex;align-items:center;justify-content:center;padding:72px 40px 48px;cursor:zoom-out}.lightbox img{max-width:96vw;max-height:84vh;object-fit:contain;background:#fff;border-radius:14px;box-shadow:0 24px 70px #0008;cursor:default}.lightbox>span{position:absolute;bottom:18px;color:#ddcfe2;font-size:12px}.lightbox-close{position:absolute;top:20px;right:24px;width:46px;height:46px;border-radius:50%;border:1px solid #ffffff55;background:#ffffff18;color:#fff;display:grid;place-items:center}
@media(max-width:860px){.hero{grid-template-columns:1fr;padding:45px 22px;gap:34px}.hero h1{font-size:54px}.content{padding:0 18px 60px}.exchange-tabs{margin:0 16px 40px}.exchange-tabs small{display:none}.download-links{margin:-24px 16px 40px;padding:0}.download-buttons{grid-template-columns:1fr}.title-row{flex-direction:column;align-items:flex-start;gap:24px}.guide-tabs{width:100%}.guide-tabs button{flex:1}.step,.step:nth-child(even){grid-template-columns:1fr}.step:nth-child(even) .step-copy{order:0}.step-copy{padding:35px 28px}.image-frame{height:min(66vh,620px);min-height:380px}.checks{grid-template-columns:1fr}.safety{padding:30px 22px}.safe{display:none}.crumb{padding:0 18px}footer{display:grid;gap:8px}}
@media(max-width:460px){.crumb{height:66px;padding:0 14px;gap:10px}.crumb button{width:38px;height:38px}.crumb b{font-size:14px}.hero{padding:30px 15px 38px;gap:25px}.hero h1{font-size:43px;line-height:1.02;letter-spacing:-.055em}.hero p{font-size:15px;line-height:1.7}.hero-card{display:block;padding:19px}.hero-card>.usdt-mark{width:48px;height:48px;font-size:28px;margin-bottom:14px}.hero-card-copy>h2{font-size:20px;margin-bottom:14px}.flow-list>div{padding:11px 12px}.flow-list b{font-size:13px}.exchange-tabs{margin:0 10px 32px;padding:5px;border-radius:18px}.exchange-tabs button{padding:11px 7px;gap:5px}.exchange-tabs button>span,.exchange-tabs button small{display:none}.exchange-tabs button b{font-size:14px}.download-links{margin:-18px 10px 32px}.download-heading{align-items:flex-start;flex-direction:column;gap:3px}.download-button{min-height:50px;font-size:13px}.content{padding:0 12px 52px}.title-row{gap:18px;padding-bottom:22px;margin-bottom:22px}.guide-tabs{padding:4px}.guide-tabs button{padding:10px 6px}.triple,.currency-lock{align-items:flex-start;padding:16px;line-height:1.55}.triple b,.currency-lock b{font-size:13px}.amount-lock{margin-top:-8px;padding:16px;gap:11px}.amount-lock>svg{width:25px;height:25px}.amount-lock strong{font-size:17px}.amount-lock strong span{width:27px;height:27px;margin:0 4px}.amount-lock p{font-size:12px}.step{border-radius:21px}.critical-step{border-width:2px}.step-copy{padding:27px 18px;gap:13px}.num{width:42px;height:42px;font-size:19px}.step-copy>div{min-width:0}.step-copy h3{font-size:27px}.step-copy p{font-size:15px;line-height:1.75}.critical-badge{font-size:10px}.amount-formula{padding:12px}.amount-formula strong,.amount-formula strong:first-child{font-size:13px}.mini-checks li{font-size:12px}.image-frame{height:min(72vh,560px);min-height:340px}figure{padding:14px}figcaption{text-align:center;justify-content:center}.instruction-board{padding:23px 18px;border-radius:17px}.instruction-board h4{font-size:22px}.instruction-board li{font-size:12px;padding:9px 10px}.zoom{opacity:1}.safety{padding:26px 17px;border-radius:22px}.safety h2,.title-row h2{font-size:30px}.checks p{padding:15px;font-size:13px}.lightbox{padding:65px 10px 44px}footer{padding:24px 16px}}