:root{
    --paper:#F2E6C8;--deep:#E0D2AE;--surface:#FBF4E2;--soft:#EBE0C4;
    --ink:#161208;--text:#2A2210;--muted:#5A4A28;--helper:#7A6840;
    --darkgold:#5C4814;--gold:#B8943A;--line:rgba(22,18,8,.12);--focus:rgba(92,72,20,.50);
    --shadow:0 12px 28px rgba(22,18,8,.10);--max:960px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%;object-fit:contain;object-position:center}
.top-strip{position:fixed;z-index:80;left:0;right:0;top:0;height:20px;background:var(--ink);color:var(--gold);display:flex;align-items:center;justify-content:space-between;padding:0 max(16px,calc((100vw - var(--max))/2));font-size:12px}
.top-strip a,.top-strip button{height:20px;display:flex;align-items:center;background:transparent;border:0;color:inherit;padding:0 6px}
.site-header{position:fixed;z-index:79;left:0;right:0;top:20px;height:54px;background:var(--surface);border-bottom:1px solid var(--focus);display:flex;align-items:center;justify-content:space-between;padding:0 max(16px,calc((100vw - var(--max))/2))}
.brand-link{height:44px;min-width:88px;display:flex;align-items:center;font-size:16px;font-weight:800;color:var(--ink)}
.brand-logo{height:24px;width:auto;max-width:150px}.brand-fallback{letter-spacing:.12em}
.header-actions{display:flex;align-items:center;gap:8px}.header-actions a,.header-actions button{height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:4px;font-size:14px;white-space:nowrap}
.header-app{background:linear-gradient(135deg,#161208 0%,#B8943A 100%);color:var(--surface)}
.menu-trigger{border:1px solid var(--darkgold);background:var(--surface);color:var(--ink)}
.wave-nav{position:fixed;z-index:76;left:0;right:0;top:74px;height:40px;background:var(--surface);display:flex;justify-content:center;align-items:flex-end;gap:26px;border-bottom:1px solid var(--line);font-size:13px;padding-bottom:5px}
.wave-item{width:220px;max-width:28vw;display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--muted)}
.wave-item i{display:block;height:6px;width:100%;border:1px solid var(--darkgold);border-radius:999px;transform:skewX(-22deg)}
.wave-item.active{color:var(--ink);font-weight:700}.wave-item.active i{background:var(--gold);border-color:var(--gold)}
.site-main{padding:142px 16px 52px;min-height:70vh}.container{width:min(100%,var(--max));margin:0 auto}.narrow{width:min(100%,780px);margin:0 auto}
.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--darkgold);font-weight:800;text-transform:uppercase}.lead{font-size:16px;color:var(--muted);max-width:760px}.micro{font-size:13px;color:var(--helper)}
h1{font-size:24px;line-height:1.3;color:var(--ink);margin:8px 0 14px}h2{font-size:20px;line-height:1.4;color:var(--ink);margin:0 0 10px}h3{font-size:16px;line-height:1.45;color:var(--ink);margin:0 0 8px}p{margin:0 0 14px}
.section{margin-top:36px}.section-head{margin-bottom:16px}.section-head p{color:var(--muted)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:4px;font-size:14px;border:1px solid transparent;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#161208 0%,#B8943A 100%);color:var(--surface)}.btn-secondary{background:var(--surface);border-color:var(--darkgold);color:var(--ink)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(184,148,58,.35);outline-offset:3px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:4px;box-shadow:var(--shadow);padding:22px}.card-plain{background:var(--soft);border:1px solid var(--line);border-radius:3px;padding:20px}.dark-card{background:var(--ink);color:var(--paper);border-radius:4px;padding:24px}.dark-card h2,.dark-card h3{color:var(--gold)}.dark-card p{color:var(--paper)}
.media-slot{background:var(--surface);border:1px solid var(--line);min-height:150px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain}.slot-180{height:180px}.slot-200{height:200px}.slot-240{height:240px}.slot-280{height:280px}.slot-app{height:320px;max-width:640px;margin-inline:auto}.slot-icon{width:72px;height:72px;min-height:72px}.slot-icon img{width:48px;height:48px}.slot-tall{height:300px}.empty-note{color:var(--helper);font-size:13px}
/* 首页 */
.home-index-strip{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:6px;margin:0 0 20px}.home-index-strip span{height:5px;background:transparent;border:1px solid var(--darkgold);border-radius:999px;transform:skewX(-18deg)}.home-index-strip span:nth-child(2){background:var(--gold);border-color:var(--gold)}
.home-intro{padding:26px 0 8px;border-bottom:1px solid var(--focus)}.home-intro .lead{max-width:720px}
.diagonal-feature{position:relative;min-height:260px;background:var(--soft);border:1px solid var(--line);overflow:hidden;padding:28px 42% 28px 28px}.diagonal-feature .diagonal-media{position:absolute;right:0;top:0;width:46%;height:180px;background:var(--surface);clip-path:polygon(18% 0,100% 0,100% 100%,0 100%)}.diagonal-feature .diagonal-media img{width:100%;height:100%;padding:12px}
.feature-wide{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:stretch}.feature-wide .media-slot{min-height:260px}.feature-copy{padding:24px;background:var(--surface);border:1px solid var(--line)}
.feature-single{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}.feature-single .feature-copy{padding:0;background:transparent;border:0}.feature-single .media-slot{height:240px;margin-top:18px}
.spine-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.spine-card{position:relative;background:var(--surface);border:1px solid var(--line);padding:24px 22px 22px 42px;min-height:220px}.spine-card:before{content:"";position:absolute;left:14px;top:14px;bottom:14px;width:8px;background:var(--darkgold)}.spine-card .media-slot{margin-top:14px;height:150px}.spine-card:nth-child(2):before{background:var(--gold)}
.archive-two{display:grid;grid-template-columns:1fr 1fr;gap:16px}.archive-card{background:var(--surface);border:1px solid var(--line);padding:20px}.archive-head-media{height:180px;margin-bottom:14px}
.triple-period{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}.period{background:var(--deep);border-top:3px solid var(--darkgold);padding:18px}.period:nth-child(2){margin-top:18px}.period:nth-child(3){margin-top:36px}
.status-list{display:grid;gap:10px}.status-row{display:grid;grid-template-columns:110px 1fr;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);padding:16px 18px}.status-tag{display:inline-flex;align-items:center;justify-content:center;min-height:36px;border:1px solid var(--darkgold);color:var(--darkgold);font-weight:700;background:var(--paper)}
.app-story{background:var(--ink);color:var(--paper);padding:28px;border-radius:4px}.app-story h2{color:var(--gold)}.app-story .app-copy{max-width:760px}.app-story .media-slot{margin-top:22px;background:var(--surface)}
.faq-six{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-six article{background:var(--surface);border:1px solid var(--line);padding:18px}.brand-story{border-left:6px solid var(--darkgold);padding:22px 26px;background:var(--soft)}
/* 单卡宽 */
.single-hero{background:var(--surface);border:1px solid var(--line);padding:30px;box-shadow:var(--shadow)}.single-flow{display:grid;gap:20px;margin-top:24px}.single-flow article{padding:0 0 20px;border-bottom:1px solid var(--line)}.single-flow article:last-child{border-bottom:0}.single-flow .media-slot{margin:14px 0 4px}
/* 斜切内页 */
.slash-hero{position:relative;background:var(--ink);color:var(--paper);min-height:300px;padding:34px 48% 34px 30px;overflow:hidden}.slash-hero h1{color:var(--gold)}.slash-hero .media-slot{position:absolute;right:0;top:0;width:48%;height:100%;clip-path:polygon(22% 0,100% 0,100% 100%,0 100%);background:var(--surface);border:0}.slash-sections{display:grid;gap:14px;margin-top:22px}.slash-sections article{background:var(--surface);border-left:4px solid var(--darkgold);padding:18px 20px}.slash-sections article:nth-child(even){margin-left:7%;border-left-color:var(--gold)}
/* 书脊内页 */
.book-spines{display:grid;gap:14px}.book-spines article{display:grid;grid-template-columns:82px 1fr;min-height:170px;background:var(--surface);border:1px solid var(--line)}.book-spines .spine-label{background:var(--darkgold);color:var(--surface);display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;letter-spacing:.15em;font-weight:700}.book-spines .spine-body{padding:20px}.book-spines .media-slot{margin-top:12px;height:170px}.book-spines article:nth-child(even) .spine-label{background:var(--ink);color:var(--gold)}
/* 单列说明 */
.column-hero{padding:28px;background:var(--soft);border-top:5px solid var(--darkgold)}.step-column{counter-reset:item;display:grid;gap:0;margin-top:22px}.step-column article{position:relative;padding:24px 22px 24px 74px;border-bottom:1px solid var(--focus);background:var(--surface)}.step-column article:before{counter-increment:item;content:counter(item,decimal-leading-zero);position:absolute;left:20px;top:24px;font-size:22px;color:var(--gold);font-weight:800}.step-column .media-slot{margin-top:14px}
/* 旬角 */
.period-flow{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0;border:1px solid var(--line);background:var(--surface)}.period-flow article{padding:22px;border-right:1px solid var(--line);min-height:250px}.period-flow article:last-child{border-right:0}.period-flow article:nth-child(2){background:var(--soft)}.period-flow .media-slot{height:160px;margin-bottom:14px}
/* 状态条 */
.progress-lines{display:grid;gap:12px}.progress-line{background:var(--surface);border:1px solid var(--line);padding:18px}.progress-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}.progress-bar{height:5px;background:var(--deep);margin-top:14px;overflow:hidden}.progress-bar span{display:block;height:100%;background:var(--darkgold)}.progress-line:nth-child(1) .progress-bar span{width:100%}.progress-line:nth-child(2) .progress-bar span{width:58%}.progress-line:nth-child(3) .progress-bar span{width:34%}.progress-line:nth-child(4) .progress-bar span{width:18%}
/* 备忘 */
.memo-list{display:grid;gap:16px}.memo-block{background:var(--surface);border:1px solid var(--line);padding:22px}.memo-block ul{padding-left:20px;margin:10px 0 0}.memo-block li{margin:7px 0}.memo-block.feature{display:grid;grid-template-columns:1fr 260px;gap:20px}.memo-block.feature .media-slot{height:220px}
/* 方法 */
.method-track{display:grid;grid-template-columns:180px 1fr;gap:18px}.method-nav{align-self:start;background:var(--ink);color:var(--paper);padding:18px;position:sticky;top:132px}.method-nav a{display:block;padding:9px 0;border-bottom:1px solid rgba(242,230,200,.18)}.method-body{display:grid;gap:16px}.method-body article{background:var(--surface);padding:22px;border:1px solid var(--line)}
/* 专题 */
.topic-list{display:grid;gap:12px}.topic-row{display:grid;grid-template-columns:170px 1fr auto;align-items:center;gap:18px;background:var(--surface);border:1px solid var(--line);padding:18px}.topic-row .topic-type{color:var(--darkgold);font-weight:800}.topic-row .btn{min-width:110px}
/* 角架 */
.center-stack{width:min(100%,760px);margin:0 auto;display:grid;gap:18px}.center-stack .hero-center{text-align:center;background:var(--surface);border:1px solid var(--line);padding:34px}.center-stack .media-slot{height:220px}.shelf-note{padding:20px 24px;background:var(--deep);border:1px solid var(--focus)}
/* APP */
.app-page-top{text-align:left;background:var(--surface);border-top:4px solid var(--gold);padding:28px}.app-reading{display:grid;gap:16px;margin-top:20px}.app-reading article{background:var(--soft);padding:20px;border-left:5px solid var(--darkgold)}.app-visual{background:var(--ink);padding:24px;margin-top:24px}.app-visual .slot-icon{margin:0 auto 12px}.app-visual .slot-app{margin-top:12px}.app-visual p{text-align:center;color:var(--paper)}
/* 安装 */
.install-flow{display:grid;gap:12px}.install-step{display:grid;grid-template-columns:72px 1fr;background:var(--surface);border:1px solid var(--line)}.install-step strong{background:var(--deep);display:flex;align-items:center;justify-content:center;color:var(--darkgold);font-size:18px}.install-step div{padding:18px 20px}
/* 条款 */
.policy-intro{background:var(--ink);color:var(--paper);padding:26px}.policy-intro h1{color:var(--gold)}.policy-sections{display:grid;gap:18px;margin-top:20px}.policy-sections section{background:var(--surface);border:1px solid var(--line);padding:22px}.policy-sections section:nth-child(even){background:var(--soft)}
.grade-band{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grade-band article{padding:22px;background:var(--surface);border-top:4px solid var(--darkgold)}
.privacy-steps{display:grid;gap:0;border-left:2px solid var(--darkgold);margin-left:12px}.privacy-steps section{position:relative;margin-left:24px;padding:0 0 24px 18px}.privacy-steps section:before{content:"";position:absolute;left:-31px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--gold);border:3px solid var(--paper)}
/* 帮助 */
.help-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-index article{background:var(--surface);padding:20px;border:1px solid var(--line)}.help-index a{display:inline-flex;margin-top:8px;color:var(--darkgold);font-weight:700}
/* FAQ */
.faq-list{display:grid;gap:10px}.faq-list details{background:var(--surface);border:1px solid var(--line);padding:0 18px}.faq-list summary{cursor:pointer;font-weight:700;color:var(--ink);padding:16px 0;min-height:52px}.faq-list details p{padding:0 0 18px;margin:0;color:var(--muted)}
/* 联系 */
.contact-paths{display:grid;gap:16px}.contact-path{background:var(--surface);border:1px solid var(--line);padding:22px 22px 22px 96px;position:relative}.contact-path .number{position:absolute;left:22px;top:22px;font-size:28px;color:var(--gold);font-weight:800}.contact-note{background:var(--ink);color:var(--paper);padding:24px}.contact-note h2{color:var(--gold)}
/* 关于 */
.about-banner{height:200px;background:var(--surface);border:1px solid var(--line);margin-bottom:22px}.about-banner img{width:100%;height:100%;object-fit:contain}.about-manifesto{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.about-manifesto>div{background:var(--surface);border:1px solid var(--line);padding:24px}.about-points{display:grid;gap:12px}.about-points article{background:var(--soft);padding:18px;border-left:4px solid var(--darkgold)}
/* 页脚 */
.site-footer{background:var(--ink);color:var(--paper);border-top:1px solid var(--gold);font-size:13px;padding:34px 16px calc(26px + env(safe-area-inset-bottom))}.footer-inner{width:min(100%,var(--max));margin:0 auto}.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:22px}.footer-logo{height:24px;width:auto}.footer-brand strong{font-size:16px;color:var(--paper)}.footer-brand span{color:var(--gold);letter-spacing:.12em}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-links h2{font-size:13px;color:var(--gold);margin-bottom:8px}.footer-links a{display:block;padding:4px 0;color:var(--paper)}.footer-note{margin-top:22px;color:var(--paper);max-width:820px}.copyright{color:var(--gold);margin-bottom:0}
.screen-overlay{position:fixed;inset:0;z-index:90;background:rgba(22,18,8,.46);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.is-locked{overflow:hidden}
.site-drawer{position:fixed;z-index:95;right:18px;top:86px;width:32%;max-width:460px;min-width:340px;max-height:80vh;background:var(--surface);border:1px solid var(--focus);box-shadow:var(--shadow);transform:translateX(calc(100% + 30px));opacity:0;visibility:hidden;pointer-events:none;transition:.24s;display:flex;flex-direction:column}.site-drawer.is-open{transform:translateX(0);opacity:1;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px;min-height:44px}.drawer-brand img{height:24px;width:auto}.drawer-brand span{display:flex;flex-direction:column}.drawer-brand small{font-size:10px;color:var(--helper);letter-spacing:.12em}.drawer-close{height:44px;border:1px solid var(--darkgold);background:var(--surface);padding:0 12px}.drawer-body{padding:10px 16px 18px;overflow:auto}.drawer-group{padding:10px 0;border-bottom:1px solid var(--line)}.drawer-group:last-child{border:0}.drawer-group h2{font-size:13px;color:var(--darkgold);margin-bottom:6px}.drawer-group a{display:grid;grid-template-columns:88px 1fr;gap:10px;align-items:center;min-height:44px;padding:5px 0}.drawer-group a b{color:var(--ink)}.drawer-group a span{font-size:12px;color:var(--helper)}
.search-panel{position:fixed;z-index:96;left:0;right:0;top:74px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto}.search-card{width:min(calc(100% - 32px),760px);margin:0 auto;background:var(--surface);border:1px solid var(--focus);box-shadow:var(--shadow);padding:18px}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;color:var(--ink)}.search-head button{height:44px;border:1px solid var(--darkgold);background:var(--surface);padding:0 12px}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;height:46px;border:1px solid var(--darkgold);background:var(--paper);color:var(--ink);padding:0 12px;border-radius:3px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{min-height:42px;display:inline-flex;align-items:center;padding:0 14px;background:var(--soft);border:1px solid var(--line);border-radius:3px}.search-empty{margin:12px 0 0;color:var(--helper)}
.mobile-bottom{display:none}
@media (hover:hover){a:hover{color:var(--darkgold)}.btn-primary:hover{filter:brightness(1.06)}.btn-secondary:hover{background:var(--soft)}.site-footer a:hover{color:var(--gold)}}
@media (max-width:760px){
    body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.top-strip{padding:0 10px}.site-header{padding:0 10px}.wave-nav{display:none}.site-main{padding:98px 16px 44px}.header-actions{gap:4px}.header-actions a,.header-actions button{padding:0 10px}.brand-link{min-width:70px}
    h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}
    .diagonal-feature{padding:22px;min-height:430px}.diagonal-feature .diagonal-media{position:relative;right:auto;top:auto;width:100%;height:180px;clip-path:polygon(0 0,100% 0,90% 100%,0 100%);margin-top:18px}
    .feature-wide,.spine-pair,.archive-two,.faq-six,.about-manifesto,.grade-band{grid-template-columns:1fr}.triple-period{grid-template-columns:1fr}.period:nth-child(2),.period:nth-child(3){margin-top:0}.status-row{grid-template-columns:1fr}.period-flow{grid-template-columns:1fr}.period-flow article{border-right:0;border-bottom:1px solid var(--line)}.period-flow article:last-child{border-bottom:0}
    .slash-hero{padding:26px 22px 230px;min-height:480px}.slash-hero .media-slot{top:auto;bottom:0;width:100%;height:220px;clip-path:polygon(0 14%,100% 0,100% 100%,0 100%)}.slash-sections article:nth-child(even){margin-left:0}
    .book-spines article{grid-template-columns:54px 1fr}.memo-block.feature{grid-template-columns:1fr}.method-track{grid-template-columns:1fr}.method-nav{position:static}.topic-row{grid-template-columns:1fr}.topic-row .btn{width:max-content}.help-index{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.footer-note{padding-bottom:8px}
    .site-drawer{right:8px;top:82px;width:88%;min-width:0;max-height:80vh}.drawer-group a{grid-template-columns:80px 1fr}
    .search-panel{inset:0;top:0;background:var(--ink);display:flex;align-items:flex-start;justify-content:center;padding:56px 16px 16px}.search-card{width:100%;margin:0;background:var(--ink);color:var(--gold);border-color:var(--gold);box-shadow:none}.search-head{color:var(--gold)}.search-head button{background:var(--ink);border-color:var(--gold);color:var(--gold)}.search-card label{color:var(--paper)}.search-card input{background:var(--surface);color:var(--ink)}.search-presets a{background:var(--darkgold);border-color:var(--gold);color:var(--surface)}.search-empty{color:var(--paper)}
    .mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;z-index:85;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--ink);border-top:1px solid var(--gold)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;color:var(--paper);font-size:13px;min-height:48px}.mobile-bottom a.active{background:var(--gold);color:var(--ink);font-weight:700}
    .screen-overlay{z-index:90}.site-drawer{z-index:95}.mobile-bottom{z-index:85}
}
@media (max-width:420px){.footer-links{grid-template-columns:1fr}.book-spines .spine-body{padding:16px}.contact-path{padding-left:78px}.contact-path .number{left:18px}.drawer-group a{grid-template-columns:72px 1fr}.header-app{font-size:13px}}