:root{--vermilion:#d94a3d;--vermilion-deep:#b83a2e;--ink-dark:#2a2a28;--bamboo:#7a9e6b;
--ochre:#c9973f;--cloud:#3a7d80;--paper:#faf7ef;--paper-2:#f3eee1;--card:#fffdf7;
--ink:#2a2a28;--ink-soft:#6b655a;--line:#e8e1d0;--white:#fffdf7}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
color:var(--ink);background:var(--paper);line-height:1.75;font-size:16px;padding-right:92px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1100px;margin:0 auto;padding:0 28px}
.accent{color:var(--vermilion)}
h1,h2,h3{line-height:1.22;font-weight:700;font-family:Georgia,"Songti SC","STSong","SimSun",serif}
h1{font-size:clamp(40px,6vw,68px)}
h2{font-size:clamp(26px,3.6vw,38px)}
h3{font-size:19px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:4px;color:var(--vermilion);font-weight:700;margin-bottom:14px}

/* 右侧竖排导航(书签栏) */
.siderail{position:fixed;right:0;top:0;bottom:0;width:92px;z-index:80;background:linear-gradient(180deg,var(--paper-2),var(--paper));
border-left:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:22px 0;box-shadow:-6px 0 24px rgba(42,42,40,.05)}
.siderail::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,var(--vermilion),var(--ochre))}
.rail-brand{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:20px}
.rail-brand .brand-mark{width:34px;height:34px}
.rail-word{writing-mode:vertical-rl;text-orientation:upright;font-size:14px;font-weight:800;letter-spacing:2px;color:var(--ink);font-family:Georgia,"Songti SC",serif}
.rail-nav{display:flex;flex-direction:column;gap:2px;margin:auto 0;flex:1;justify-content:center}
.nav-link{display:flex;flex-direction:column;align-items:center;gap:8px;padding:9px 6px;position:relative}
.nav-char{writing-mode:vertical-rl;text-orientation:upright;font-size:15px;letter-spacing:3px;color:var(--ink);opacity:.75;transition:.2s;font-weight:600}
.nav-dot{width:6px;height:6px;border-radius:50%;background:var(--line);transition:.2s}
.nav-link:hover .nav-char,.nav-link.on .nav-char{color:var(--vermilion);opacity:1}
.nav-link:hover .nav-dot,.nav-link.on .nav-dot{background:var(--vermilion);box-shadow:0 0 0 3px rgba(217,74,61,.16)}
.rail-cta{width:52px;height:52px;border-radius:8px;background:var(--vermilion);color:#fff;display:flex;align-items:center;justify-content:center;
font-size:15px;font-weight:700;writing-mode:vertical-rl;text-orientation:upright;letter-spacing:2px;margin-top:18px;box-shadow:0 8px 20px rgba(217,74,61,.3);transition:.2s}
.rail-cta:hover{background:var(--vermilion-deep);transform:translateY(-2px)}

/* 卷首 hero */
.hero{position:relative;overflow:hidden;padding:66px 0 60px;min-height:600px;display:flex;align-items:center}
.hero-paper{position:absolute;inset:0;background:radial-gradient(circle at 12% 16%,rgba(217,74,61,.06),transparent 42%),
radial-gradient(circle at 88% 74%,rgba(201,151,63,.08),transparent 46%),
repeating-linear-gradient(0deg,transparent 0 27px,rgba(232,225,208,.34) 27px 28px)}
.hero-deco{position:absolute;inset:0;pointer-events:none}
.hero-deco .paper-float{position:absolute;right:22%;top:40px;width:190px;opacity:.85;filter:drop-shadow(0 10px 22px rgba(42,42,40,.15));animation:float 7s ease-in-out infinite}
.hero-deco .inkstone-float{position:absolute;left:3%;bottom:30px;width:150px;opacity:.9;filter:drop-shadow(0 8px 18px rgba(42,42,40,.2));animation:float 8.5s ease-in-out infinite}
.hero-deco .paper-float svg,.hero-deco .inkstone-float svg{width:100%;height:auto}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-13px)}}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.hero-copy .eyebrow{margin-bottom:16px}
.hero-title{margin-bottom:4px}
.brush-line{display:block;width:230px;margin:8px 0 22px}
.brush-line svg{width:100%;height:auto}
.hero-sub{font-size:18px;color:var(--ink-soft);max-width:540px;margin-bottom:30px}
.hero-actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:15px 34px;border-radius:6px;font-size:16px;font-weight:700;letter-spacing:1px;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--vermilion);color:#fff;box-shadow:inset 0 0 0 2px rgba(255,255,255,.25),0 6px 18px rgba(217,74,61,.28);transform:rotate(-.6deg)}
.btn-primary:hover{background:var(--vermilion-deep);transform:rotate(0) translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(42,42,40,.45)}
.btn-ghost:hover{border-color:var(--ink);background:rgba(42,42,40,.05)}
.hero-points{display:flex;gap:10px;flex-wrap:wrap}
.point{background:rgba(42,42,40,.04);border:1px solid rgba(42,42,40,.14);color:var(--ink);padding:6px 14px;border-radius:20px;font-size:12.5px;letter-spacing:.5px}
.hero-media{position:relative}
.mount{position:relative;background:var(--card);padding:12px 12px 40px;border:1px solid var(--line);box-shadow:0 24px 60px rgba(42,42,40,.18);transform:rotate(1.2deg)}
.mount img{width:100%;height:340px;object-fit:cover}
.mount-seal{position:absolute;right:-16px;bottom:-20px;width:74px;filter:drop-shadow(0 8px 16px rgba(217,74,61,.35))}
.mount-seal svg{width:100%;height:auto}
.vert-note{position:absolute;left:-26px;top:20px;writing-mode:vertical-rl;text-orientation:upright;font-size:13px;letter-spacing:4px;color:var(--ink-soft);font-family:Georgia,"Songti SC",serif;opacity:.85}

/* 卷分节 */
.scroll-chapter{padding:64px 0;position:relative}
.scroll-chapter.alt{background:var(--paper-2)}
.chapter-head{display:flex;align-items:flex-start;gap:22px;margin-bottom:42px;position:relative}
.chapter-head::after{content:"";position:absolute;left:0;right:0;bottom:-18px;height:1px;background:linear-gradient(90deg,var(--line),transparent)}
.chapter-label{flex:0 0 52px;height:86px;border:2px solid var(--vermilion);border-radius:6px;color:var(--vermilion);display:flex;align-items:center;justify-content:center;
writing-mode:vertical-rl;text-orientation:upright;letter-spacing:6px;font-size:14px;font-weight:800;font-family:Georgia,"Songti SC",serif;background:rgba(255,253,247,.6)}
.chapter-title h2{margin-bottom:6px}
.chapter-title p{color:var(--ink-soft);max-width:620px}

/* section (内页) */
.section{padding:64px 0}
.section.alt{background:var(--paper-2)}
.section-head{text-align:center;max-width:640px;margin:0 auto 44px}
.section-head .eyebrow{color:var(--vermilion)}
.section-head h2{margin-bottom:10px}
.section-head p{color:var(--ink-soft);margin-top:10px}
.section-head::after{content:"";display:block;width:56px;height:3px;margin:16px auto 0;background:var(--vermilion);border-radius:2px}
.section-foot{text-align:center;margin-top:36px}

/* 玻璃功能格 */
.glass-panel{position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.glass-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:blur(6px);transform:scale(1.05)}
.glass-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:26px}
.glass-card{background:rgba(255,253,247,.82);backdrop-filter:blur(8px);border:1px solid rgba(232,225,208,.85);border-radius:12px;padding:24px 22px;transition:.2s}
.glass-card:hover{transform:translateY(-4px);background:rgba(255,253,247,.94);box-shadow:0 12px 28px rgba(42,42,40,.12)}
.glass-ico{font-size:26px;margin-bottom:12px}
.glass-card h3{margin-bottom:8px;font-size:18px}
.glass-card p{font-size:14px;color:var(--ink-soft)}

/* bento (内页矩阵) */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.people-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media(max-width:820px){.people-row{grid-template-columns:repeat(2,1fr)}}
.bento-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px 24px;transition:.2s}
.bento-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(42,42,40,.1);border-color:var(--vermilion)}
.bento-ico{font-size:30px;margin-bottom:12px}
.bento-card h3{margin-bottom:8px}
.bento-card p{font-size:14px;color:var(--ink-soft)}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split.rev .split-media{order:-1}
.split-copy .eyebrow{color:var(--vermilion)}
.split-copy h2{margin-bottom:16px}
.split-copy h3{margin:18px 0 6px}
.split-copy p{color:var(--ink-soft);margin-bottom:12px}
.checklist{list-style:none;margin:18px 0 22px}
.checklist li{padding:6px 0 6px 28px;position:relative;color:var(--ink)}
.checklist li::before{content:"✓";position:absolute;left:0;color:var(--vermilion);font-weight:700}
.media-frame{border-radius:12px;overflow:hidden;box-shadow:0 16px 40px rgba(42,42,40,.16)}
.media-frame img{width:100%;height:320px;object-fit:cover}
.terrace-frame{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}

/* steps */
.steps{max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:0}
.step{display:flex;gap:20px;position:relative;padding-bottom:30px}
.step:not(:last-child)::before{content:"";position:absolute;left:21px;top:48px;bottom:0;width:2px;background:var(--line)}
.step-num{flex:0 0 44px;height:44px;border-radius:8px;background:var(--vermilion);color:#fff;display:flex;align-items:center;justify-content:center;
font-weight:800;font-size:17px;font-family:Georgia,serif;box-shadow:0 6px 16px rgba(217,74,61,.28)}
.step-body h3{margin-bottom:4px}
.step-body p{color:var(--ink-soft);font-size:14px}

/* faq */
.faq{max-width:760px;margin:0 auto}
.reviews-sec{background:var(--bg-2)}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 12px 32px rgba(0,0,0,.35)}
.review-card .stars{color:#f5a623;font-size:16px;letter-spacing:2px;margin-bottom:12px}
.review-card p{color:var(--ink-soft);font-size:15px;line-height:1.7}
.rv-meta{margin-top:16px;display:flex;align-items:center;gap:10px}
.rv-meta strong{font-size:14px}
.rv-meta span{font-size:12px;color:var(--ink-soft);background:var(--bg-2);padding:3px 10px;border-radius:12px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-item summary{padding:18px 22px;font-weight:600;cursor:pointer;list-style:none;position:relative}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:12px;font-size:22px;color:var(--vermilion);transition:.2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 20px;color:var(--ink-soft);font-size:14px}

/* platform */
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.platform-card{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;display:block;transition:.2s}
.platform-card:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(42,42,40,.12)}
.platform-top{height:5px}
.platform-body{padding:20px 18px}
.platform-ico{font-size:24px}
.platform-body h3{margin:10px 0 4px;font-size:17px}
.platform-body p{font-size:13px;color:var(--ink-soft);margin-bottom:10px}
.platform-link{color:var(--vermilion);font-size:13px;font-weight:700}

/* table */
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
th,td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--ink);color:#fff;font-weight:600}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#faf3e2}

/* tip */
.tip{background:#f6efdd;border-left:4px solid var(--ochre);padding:16px 20px;border-radius:6px;font-size:14px;color:var(--ink);margin-top:20px}

/* 内页卷首 */
.page-hero{position:relative;padding:54px 0 48px;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(circle at 20% 0%,rgba(217,74,61,.05),transparent 45%)}
.page-hero .wrap{text-align:left}
.page-hero .eyebrow{color:var(--vermilion)}
.page-hero h1{font-size:clamp(32px,4.6vw,50px);margin:4px 0 14px}
.page-hero .accent{color:var(--vermilion)}
.page-sub{font-size:16px;color:var(--ink-soft);max-width:620px}
.page-hero .hero-actions{margin:22px 0 0;flex-direction:row;align-items:center}
.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;font-size:13px;margin-bottom:20px;opacity:.85}
.crumb a{color:var(--ink-soft);border-bottom:1px dotted var(--ochre)}
.crumb a:hover{color:var(--vermilion)}
.crumb+.crumb::before{content:"/";margin-right:8px;opacity:.4}
.crumb{color:var(--ink-soft)}

/* 文章 */
.article-hero{position:relative;padding:54px 0 40px;border-bottom:1px solid var(--line);background:radial-gradient(circle at 18% 0%,rgba(217,74,61,.05),transparent 45%)}
.article-hero .wrap{text-align:left}
.article-hero .breadcrumb{justify-content:flex-start}
.article-hero h1{font-size:clamp(28px,3.8vw,42px);margin:8px 0 14px;max-width:820px}
.article-hero .accent{color:var(--vermilion)}
.article-meta{font-size:13px;color:var(--ink-soft);letter-spacing:1px}
.article-layout{display:grid;grid-template-columns:230px 1fr;gap:44px;padding:48px 0 64px;align-items:start}
.toc{position:sticky;top:24px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}
.toc h4{font-size:12px;color:var(--vermilion);letter-spacing:2px;margin-bottom:14px}
.toc a{display:block;font-size:13px;color:var(--ink);padding:7px 0 7px 14px;border-left:2px solid var(--line);transition:.2s}
.toc a:hover{color:var(--vermilion);border-color:var(--vermilion)}
.article-body{max-width:720px}
.article-body h2{font-size:24px;margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--vermilion)}
.article-body h3{font-size:18px;margin:26px 0 10px}
.article-body p{margin-bottom:16px;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 18px 24px}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:10px;margin:20px 0}
.article-body .lead{font-size:18px;color:var(--vermilion-deep);font-weight:500}
.related{border-top:1px solid var(--line);margin-top:40px;padding-top:30px}
.related h3{margin-bottom:16px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;font-size:14px}
.related-card:hover{border-color:var(--vermilion)}
.related-card span{color:var(--vermilion);font-weight:700}

/* 站内搜索 */
.search-box{max-width:520px;margin:26px 0 0;display:flex;gap:10px}
.search-input{flex:1;padding:13px 18px;border-radius:6px;border:1px solid var(--line);font-size:15px;outline:none;background:var(--card)}
.search-input:focus{border-color:var(--vermilion)}
.search-btn{background:var(--ink);color:#fff;border:none;padding:0 26px;border-radius:6px;font-size:15px;font-weight:700;cursor:pointer}
.search-results{max-width:640px;margin:30px 0 0;text-align:left}
.search-results .hit{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:14px 18px;margin-bottom:10px}
.search-results .hit a{color:var(--vermilion);font-weight:600}

/* 站内地图 */
.sitegroup{margin-bottom:34px}
.sitegroup h2{font-size:20px;margin-bottom:14px;color:var(--vermilion-deep)}
.sitegroup ul{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.sitegroup li a{color:var(--ink);font-size:14px;border-bottom:1px dotted var(--line);display:inline-block;padding-bottom:2px}
.sitegroup li a:hover{color:var(--vermilion)}

/* 分享 */
.share{display:flex;gap:14px;align-items:center;font-size:13px;margin:24px 0 0;color:var(--ink-soft)}
.share a{color:var(--vermilion);border-bottom:1px dotted var(--vermilion)}

/* 卷终 CTA */
.final-cta{position:relative;overflow:hidden;padding:96px 0;text-align:center}
.cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:blur(4px);transform:scale(1.06)}
.cta-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(42,42,40,.82),rgba(42,42,40,.72))}
.cta-inner{position:relative;z-index:1}
.cta-seal{width:86px;margin:0 auto 22px;filter:drop-shadow(0 10px 24px rgba(217,74,61,.4))}
.cta-seal svg{width:100%;height:auto}
.final-cta h2{font-family:Georgia,"Songti SC","SimSun",serif;color:#faf7ef;margin-bottom:10px}
.final-cta .accent{color:#f0c2ae}
.final-cta p{color:rgba(250,247,239,.82);margin-bottom:28px}
.final-cta .btn-primary{background:#fff;color:var(--vermilion-deep);box-shadow:none}

/* 页脚(卷终跋) */
.sitefoot{background:var(--ink-dark);color:#c9c4b8;padding:64px 0 34px;font-size:14px;text-align:center}
.colophon{display:flex;flex-direction:column;align-items:center}
.colophon-seal{margin-bottom:18px}
.colophon-seal .brand-mark{width:56px;height:56px;border-radius:10px;box-shadow:0 6px 16px rgba(0,0,0,.35)}
.colophon-word{display:flex;flex-direction:column;align-items:center;gap:4px;margin-bottom:22px}
.colophon-title{font-size:22px;font-weight:800;color:#faf7ef;font-family:Georgia,"Songti SC",serif}
.colophon-sub{font-size:12px;letter-spacing:3px;color:#8f8979}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;justify-content:center;margin-bottom:26px}
.foot-links a{color:#c9c4b8;font-size:14px}
.foot-links a:hover{color:#f0c2ae}
.foot-copy{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;color:#8f8979;font-size:12.5px}

/* backtop */
.backtop{position:fixed;right:110px;bottom:26px;width:44px;height:44px;border-radius:8px;border:none;background:var(--vermilion);color:#fff;
font-size:20px;cursor:pointer;display:none;z-index:70;box-shadow:0 6px 18px rgba(0,0,0,.22)}
.backtop:hover{background:var(--vermilion-deep)}

@media(max-width:920px){
body{padding-right:0}
.siderail{position:sticky;top:0;left:0;right:0;width:100%;height:auto;bottom:auto;flex-direction:row;padding:0 16px;gap:0;
box-shadow:none;border-left:none;border-bottom:1px solid var(--line)}
.siderail::before{height:3px}
.rail-brand{flex-direction:row;gap:8px;margin:0;margin-right:auto}
.rail-word{writing-mode:horizontal-tb;letter-spacing:1px}
.rail-nav{flex-direction:row;gap:2px;flex:0 1 auto;justify-content:flex-start;margin:0;overflow-x:auto}
.nav-link{flex-direction:row;gap:5px;padding:14px 8px}
.nav-char{writing-mode:horizontal-tb;font-size:13px;letter-spacing:0}
.nav-dot{display:none}
.rail-cta{width:auto;height:auto;writing-mode:horizontal-tb;padding:8px 14px;margin:0;border-radius:6px}
.hero-inner{grid-template-columns:1fr;gap:36px}
.hero-media{max-width:480px}
.glass-grid{grid-template-columns:repeat(2,1fr);padding:18px}
.bento{grid-template-columns:repeat(2,1fr)}
.platform-grid{grid-template-columns:repeat(2,1fr)}
.split,.split.rev{grid-template-columns:1fr;gap:30px}
.split.rev .split-media{order:0}
.article-layout{grid-template-columns:1fr}
.toc{position:static}
.related-grid{grid-template-columns:1fr}
.sitegroup ul{grid-template-columns:1fr}
.hero-deco .paper-float,.hero-deco .inkstone-float,.mount-seal,.vert-note{display:none}
.backtop{right:20px}
}