:root{--bg:#FFF5F8;--bg-deep:#FFEBF1;--surface:#FFFFFF;--surface-2:#FFF0F5;--hover:#FFE4EC;--title:#2D1B24;--text:#3D2A32;--muted:#6B4E58;--soft:#9A7A85;--pink:#FF6B9D;--pink-2:#FF8FAB;--pink-3:#FFB3C6;--line:rgba(255,107,157,.15);--line-strong:rgba(255,107,157,.35);--shadow:0 12px 36px rgba(255,107,157,.12);--glow:0 10px 28px rgba(255,107,157,.18);--radius:18px;--max:1280px;--nav-h:72px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.layer-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--title);line-height:1.25}h1{font-size:clamp(2.2rem,5vw,4.6rem);letter-spacing:-.04em}h2{font-size:clamp(1.55rem,3vw,2.55rem)}h3{font-size:1.12rem}p{color:var(--muted)}.skip-link{position:fixed;top:8px;left:8px;z-index:9999;transform:translateY(-160%);background:var(--title);color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:80;background:rgba(255,245,248,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav-shell{height:var(--nav-h);max-width:var(--max);padding:0 20px;margin:auto;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;flex:0 0 auto}.brand-logo{max-height:44px;width:auto;object-fit:contain}.brand-text{font-weight:850;font-size:1.32rem;color:var(--title);white-space:nowrap}.desktop-nav{display:flex;gap:3px;align-items:center;min-width:0}.desktop-nav a{position:relative;padding:10px 13px;border-radius:999px;color:var(--muted);font-weight:650;white-space:nowrap}.desktop-nav a:hover,.desktop-nav a.is-active{background:var(--surface-2);color:var(--pink)}.desktop-nav a.is-active:after{content:"";position:absolute;left:28%;right:28%;bottom:4px;height:2px;background:var(--pink);border-radius:2px}.nav-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.icon-btn,.app-pill{min-width:44px;height:44px;border:1px solid var(--line-strong);border-radius:999px;background:var(--surface);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s ease}.icon-btn:hover,.app-pill:hover{background:var(--hover);border-color:var(--pink)}.app-pill{padding:0 18px;background:linear-gradient(135deg,var(--pink-2),var(--pink));color:#fff;border:0;font-weight:800;box-shadow:var(--glow)}.app-pill.is-active{outline:3px solid rgba(255,107,157,.18)}.mobile-menu-btn{display:none;flex-direction:column;gap:4px}.mobile-menu-btn span{width:17px;height:2px;background:var(--title);border-radius:2px}.site-main{min-height:60vh}.section{padding:76px 20px}.section-shell{max-width:var(--max);margin:0 auto}.section.soft{background:var(--surface-2)}.section.deep{background:var(--bg-deep)}.section-title{max-width:760px;margin-bottom:32px}.eyebrow{display:inline-block;color:var(--pink);font-size:.82rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}.lead{font-size:1.1rem;max-width:760px}.hero{padding:42px 20px 30px}.hero-shell{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:minmax(0,1.8fr) minmax(300px,1fr);gap:28px;align-items:stretch}.hero-media{min-height:510px;background:linear-gradient(135deg,var(--bg-deep),#fff);border:1px solid var(--line);border-radius:28px;overflow:hidden;box-shadow:var(--shadow);position:relative}.hero-media img{width:100%;height:100%;object-fit:cover}.hero-media.placeholder:before{content:"TANGXIN VLOG";position:absolute;inset:0;display:grid;place-items:center;font-size:clamp(2rem,6vw,5rem);font-weight:900;color:rgba(255,107,157,.18);letter-spacing:.08em;pointer-events:none}.hero-copy{background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:clamp(24px,4vw,46px);box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center}.hero-copy h1{font-size:clamp(2rem,4vw,3.6rem);margin-bottom:18px}.hero-copy p{font-size:1.05rem}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.btn{min-height:46px;padding:0 20px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;white-space:nowrap}.btn.primary{background:linear-gradient(135deg,var(--pink-2),var(--pink));color:white;box-shadow:var(--glow)}.btn.secondary{border:1px solid rgba(255,107,157,.4);color:var(--pink);background:#fff}.btn:hover{transform:translateY(-1px)}.mini-list{display:grid;gap:10px;margin-top:10px}.mini-list a{padding:13px 15px;border-radius:14px;background:var(--bg);border:1px solid var(--line);font-weight:700}.shortcut-bar{max-width:var(--max);margin:0 auto;padding:12px 20px 26px;display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin}.shortcut-bar a{flex:0 0 auto;padding:8px 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface-2);color:var(--muted);font-weight:700}.shortcut-bar a:hover{color:var(--pink);border-color:var(--line-strong)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 24px rgba(255,107,157,.07)}.card p:last-child{margin-bottom:0}.card .num{font-size:.8rem;color:var(--pink);font-weight:900}.card:hover{border-color:var(--line-strong)}.media-card{padding:0;overflow:hidden}.media-card img{width:100%;aspect-ratio:16/9;object-fit:cover}.media-card .card-body{padding:22px}.feature-split{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center}.feature-image{background:linear-gradient(135deg,var(--bg-deep),var(--surface));border-radius:26px;min-height:320px;overflow:hidden;border:1px solid var(--line)}.feature-image img{width:100%;height:100%;min-height:320px;object-fit:cover}.feature-copy{padding:12px}.topic-track{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x proximity;padding:4px 2px 14px}.topic-track .card{min-width:280px;scroll-snap-align:start}.notice{padding:18px 20px;border-left:4px solid var(--pink);background:var(--surface);border-radius:0 14px 14px 0}.pill-row{display:flex;gap:10px;flex-wrap:wrap}.pill{padding:8px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);font-weight:700;color:var(--muted)}.page-hero{padding:58px 20px 34px}.page-hero-shell{max-width:var(--max);margin:auto;background:linear-gradient(135deg,#fff 0%,var(--surface-2) 100%);border:1px solid var(--line);border-radius:28px;padding:clamp(28px,5vw,58px);position:relative;overflow:hidden}.page-hero-shell:after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(255,143,171,.16);right:-70px;top:-80px;filter:blur(3px);pointer-events:none}.page-hero h1{max-width:880px;margin-bottom:16px}.page-hero p{max-width:780px;font-size:1.08rem}.breadcrumb{display:flex;gap:7px;align-items:center;color:var(--soft);font-size:.9rem;margin-bottom:14px}.breadcrumb a{color:var(--pink)}.two-col{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:24px}.stack{display:grid;gap:18px}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:var(--line-strong)}.timeline article{position:relative;margin-bottom:24px}.timeline article:before{content:"";position:absolute;left:-27px;top:8px;width:10px;height:10px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 5px var(--bg)}.definition-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.definition-grid article{padding:22px;border-radius:16px;background:#fff;border:1px solid var(--line)}.steps{counter-reset:step;display:grid;gap:16px}.steps article{counter-increment:step;display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start}.steps article:before{content:counter(step);width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--pink-2),var(--pink));color:#fff;display:grid;place-items:center;font-weight:900}.quote-block{padding:34px;border-radius:24px;background:var(--title);color:#fff}.quote-block h2,.quote-block p{color:#fff}.faq-list{display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:15px;padding:0 18px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--title);padding:18px 0}.faq-list p{padding-bottom:18px;margin:0}.site-footer{background:var(--title);color:#FFD6E3;padding:54px 20px calc(24px + env(safe-area-inset-bottom))}.footer-shell{max-width:var(--max);margin:auto}.footer-brand{display:grid;grid-template-columns:auto auto minmax(0,1fr);gap:16px;align-items:center;padding-bottom:28px;border-bottom:1px solid rgba(255,214,227,.16)}.footer-brand strong{color:#fff;font-size:1.12rem}.footer-brand span{display:block;font-size:.76rem;letter-spacing:.12em}.footer-brand p{margin:0;color:#E8BAC8;max-width:680px}.footer-logo{max-height:48px;width:auto;object-fit:contain}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:34px 0}.footer-grid section{display:grid;align-content:start;gap:8px}.footer-grid h2{font-size:.95rem;color:#fff;margin-bottom:5px}.footer-grid a,.footer-bottom a{color:#E8BAC8}.footer-grid a:hover,.footer-bottom a:hover{color:#fff}.footer-notice{color:#D9AAB9;font-size:.9rem;border-top:1px solid rgba(255,214,227,.12);padding-top:20px}.footer-bottom{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:.9rem}.footer-bottom div{display:flex;gap:16px}.overlay{position:fixed;inset:0;background:rgba(45,27,36,.34);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.22s ease}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.channel-panel{position:fixed;top:0;right:0;bottom:0;width:min(460px,88vw);z-index:120;background:var(--bg);transform:translateX(102%);visibility:hidden;pointer-events:none;transition:.26s ease;box-shadow:-20px 0 50px rgba(45,27,36,.14)}.channel-panel.is-open{transform:none;visibility:visible;pointer-events:auto}.panel-head{height:72px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fff}.panel-brand{display:flex;align-items:center;gap:10px;font-weight:850}.panel-logo{max-height:38px;width:auto}.panel-scroll{height:calc(100% - 72px);overflow-y:auto;padding:18px}.panel-scroll section{margin-bottom:28px}.panel-scroll h2{font-size:.9rem;color:var(--pink);letter-spacing:.08em;margin:0 0 8px}.panel-scroll a{display:grid;gap:2px;padding:13px 12px;border-radius:14px}.panel-scroll a:hover{background:var(--surface-2)}.panel-scroll a strong{color:var(--title)}.panel-scroll a span{font-size:.85rem;color:var(--muted);line-height:1.55}.search-panel{position:fixed;top:var(--nav-h);left:0;right:0;z-index:115;background:rgba(255,245,248,.98);border-bottom:1px solid var(--line);box-shadow:0 18px 50px rgba(45,27,36,.1);transform:translateY(-20px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease;max-height:calc(100vh - var(--nav-h));overflow-y:auto}.search-panel.is-open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.search-shell{max-width:var(--max);margin:auto;padding:28px 20px 34px}.search-head{display:flex;justify-content:space-between;gap:20px;align-items:start}.search-head h2{margin-bottom:10px}.search-field{display:block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 14px;margin:12px 0 24px}.search-field span{display:block;font-size:.75rem;color:var(--soft)}.search-field input{width:100%;border:0;outline:0;background:transparent;font-size:1.05rem;color:var(--title);padding:4px 0}.search-columns{display:grid;grid-template-columns:.7fr 1.3fr;gap:28px}.search-columns h3{font-size:.9rem;color:var(--muted)}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip-row button{border:1px solid var(--line);background:var(--surface-2);padding:8px 11px;border-radius:999px;cursor:pointer}.search-results{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.search-results a{padding:12px 14px;border-radius:12px;background:#fff;border:1px solid var(--line);font-weight:800}.search-results a span{display:block;font-weight:500;color:var(--muted);font-size:.84rem}.search-results a[hidden]{display:none}.mobile-bottom-nav{display:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(255,107,157,.42);outline-offset:3px}.icon-btn,.btn,.app-pill,.desktop-nav a,.card,.shortcut-bar a{transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease}::before,::after{pointer-events:none}
@media(max-width:980px){.desktop-nav{display:none}.desktop-panel-btn{display:none}.mobile-menu-btn{display:flex}.nav-shell{justify-content:space-between;gap:10px}.brand{position:absolute;left:50%;transform:translateX(-50%)}.search-btn{display:none}.hero-shell,.feature-split,.two-col{grid-template-columns:1fr}.hero-media{min-height:360px}.hero-copy{order:-1}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-template-columns:auto 1fr}.footer-brand p{grid-column:1/-1}.search-panel{top:0;bottom:0;max-height:none}.search-shell{padding-top:24px}.search-columns{grid-template-columns:1fr}}
@media(max-width:640px){:root{--nav-h:64px}.nav-shell{height:64px;padding:0 15px}.brand-logo{max-height:36px;max-width:132px}.brand-text{font-size:1.1rem}.app-pill{min-width:58px;height:44px;padding:0 13px}.section{padding:54px 15px}.hero{padding:22px 15px 20px}.hero-shell{display:flex;flex-direction:column;gap:16px}.hero-copy{padding:24px}.hero-copy h1{font-size:2.25rem}.hero-media{min-height:0;aspect-ratio:16/10}.shortcut-bar{padding-left:15px;padding-right:15px}.card-grid,.definition-grid{grid-template-columns:1fr}.card{padding:20px}.page-hero{padding:28px 15px 18px}.page-hero-shell{padding:26px 22px;border-radius:22px}.page-hero h1{font-size:2.3rem}.topic-track .card{min-width:82vw}.footer-grid{grid-template-columns:1fr 1fr;gap:20px}.footer-brand{grid-template-columns:auto 1fr}.site-footer{padding:46px 15px calc(92px + env(safe-area-inset-bottom))}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:90;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.97);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -10px 28px rgba(45,27,36,.08)}.mobile-bottom-nav a{min-height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;font-size:.75rem;color:var(--muted)}.mobile-bottom-nav a span{font-size:1rem;line-height:1}.mobile-bottom-nav a.is-active{color:var(--pink);font-weight:850;background:var(--surface-2)}.channel-panel{width:min(88vw,420px)}.search-results{grid-template-columns:1fr}.search-shell{padding:20px 15px 90px}.footer-bottom{font-size:.82rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}