/* roulang page: index */
:root{--paper:#f7f7f3;--white:#fff;--ink:#202b27;--muted:#69746f;--green:#24584a;--green-dark:#183f35;--mint:#dfe9e2;--coral:#bd665b;--line:#dfe4de;--soft:#edf1eb;--serif:"Noto Serif SC","Songti SC",STSong,serif;--sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;--r:5px;--shadow:0 8px 24px rgba(31,55,44,.09)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.75}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
a:hover{color:var(--green)}
button{font:inherit}
img{display:block;max-width:100%}
:focus-visible{outline:3px solid #d98b78;outline-offset:3px}
.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,247,243,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:11px;min-width:0;color:var(--ink)}
.brand-mark{width:38px;height:38px;background:var(--green);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-weight:700;font-size:16px;border-radius:3px;flex:none}
.brand-name{font-weight:700;font-size:16px;line-height:1.3;white-space:nowrap}
.site-nav{display:flex;align-items:center;gap:24px}
.site-nav a{color:#52605a;font-size:13px;font-weight:600;padding:8px 0;border-bottom:2px solid transparent}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--green);border-color:var(--coral)}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:var(--white);color:var(--green);border-radius:3px;cursor:pointer}
.hero{padding:32px 0 42px}
.hero-stage{min-height:490px;position:relative;overflow:hidden;background:#25493f;color:#fff;display:flex;align-items:flex-end}
.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72;background:linear-gradient(115deg,#24473d,#778a78 52%,#bca690)}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(17,40,33,.88),rgba(17,40,33,.54) 48%,rgba(17,40,33,.06))}
.hero-content{position:relative;z-index:1;width:min(720px,75%);padding:56px 60px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:#d7e5db;font-size:12px;font-weight:700;letter-spacing:0}
.eyebrow:before{content:"";width:22px;height:1px;background:#e19481}
.hero h1{font-family:var(--serif);font-size:42px;line-height:1.3;margin:18px 0 9px;color:white;font-weight:700}
.hero h1 em{font-style:normal;color:#f1b6a1}
.hero-subtitle{font-family:var(--serif);font-size:18px;color:#e5eee8;margin:0 0 14px}
.hero-copy{max-width:610px;color:#e0e8e2;margin:0 0 24px;font-size:14px}
.button-row{display:flex;flex-wrap:wrap;gap:11px}
.button{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:3px;font-weight:700;font-size:13px}
.button-primary{background:#f0b09a;color:#2b302b}
.button-primary:hover{background:#ffd0be;color:#202b27;transform:translateY(-1px)}
.button-ghost{border-color:rgba(255,255,255,.62);color:#fff;background:rgba(255,255,255,.06)}
.button-ghost:hover{background:#fff;color:var(--green)}
.hero-note{position:absolute;right:30px;bottom:28px;color:#e4ebe5;font-size:11px}
.section{padding:64px 0;border-bottom:1px solid var(--line)}
.section-soft{background:#eef1eb}
.section-dark{background:var(--green-dark);color:white;border-bottom:0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px}
.section-head h2,.section h2{font-family:var(--serif);font-size:28px;line-height:1.35;margin:0;color:var(--ink)}
.section-dark h2{color:white}
.section-head p{max-width:580px;color:var(--muted);font-size:13px;margin:0}
.section-dark .section-head p{color:#cad7cf}
.section-kicker{display:block;color:var(--coral);font-size:11px;font-weight:800;margin-bottom:7px}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trio-item{padding:21px 26px 20px 0;position:relative}
.trio-item+.trio-item{border-left:1px solid var(--line);padding-left:26px}
.trio-item strong{display:block;font-family:var(--serif);font-size:18px;margin-bottom:4px}
.trio-item p{font-size:13px;color:var(--muted);margin:0}
.toolbar{display:flex;align-items:center;justify-content:space-between;margin:0 0 18px;gap:16px}
.toolbar-label{font-size:12px;color:var(--muted)}
.filter-list{display:flex;flex-wrap:wrap;gap:7px}
.filter-chip{border:1px solid var(--line);padding:5px 11px;color:#53625a;font-size:11px;background:#fff}
.filter-chip.active{border-color:var(--green);background:var(--green);color:white}
.book-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:24px 16px}
.book-card{min-width:0}
.cover-wrap{position:relative;aspect-ratio:3/4;overflow:hidden;background:#d8dfd7;border-radius:3px}
.cover-art{height:100%;display:flex;align-items:flex-end;padding:15px;position:relative;isolation:isolate;color:#fff;background:var(--cover)}
.cover-art:before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(20,37,31,.02) 24%,rgba(20,37,31,.72))}
.cover-shape{position:absolute;top:14%;right:13%;width:55%;height:42%;border:1px solid rgba(255,255,255,.6);border-radius:50% 50% 3px 3px;opacity:.55}
.cover-art span{font-family:var(--serif);font-size:18px;line-height:1.4;text-shadow:0 2px 8px #17251f}
.badge{position:absolute;top:9px;left:9px;padding:3px 7px;background:rgba(255,255,255,.94);color:var(--green-dark);font-size:10px;font-weight:700;border-radius:2px}
.book-title{font-family:var(--serif);font-weight:700;font-size:14px;line-height:1.5;margin:10px 0 4px;overflow-wrap:anywhere}
.book-meta{display:flex;justify-content:space-between;gap:8px;align-items:center;color:var(--muted);font-size:10px}
.rating{color:#8d5a36;font-weight:800;white-space:nowrap}
.tag{display:inline-block;color:var(--green);background:var(--mint);font-size:10px;line-height:1.5;padding:3px 7px;margin-top:7px}
.recommend-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:34px;align-items:start}
.featured-book{min-height:360px;display:grid;grid-template-columns:42% 1fr;background:#fff;border:1px solid var(--line)}
.featured-cover{min-height:360px;position:relative;background:linear-gradient(155deg,#8faca0,#d5b7a7 58%,#5f786d);display:flex;align-items:flex-end;padding:20px;color:white}
.featured-cover:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 42%,rgba(25,43,36,.63))}
.featured-cover span{position:relative;font:700 24px/1.5 var(--serif)}
.featured-text{padding:28px 24px}
.featured-text h3{font:700 23px/1.5 var(--serif);margin:0 0 9px}
.featured-text p{font-size:13px;color:var(--muted);margin:0 0 16px}
.recommend-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.recommend-item{display:flex;gap:12px;min-width:0;padding-bottom:13px;border-bottom:1px solid var(--line)}
.mini-cover{width:58px;aspect-ratio:3/4;flex:none;background:linear-gradient(150deg,var(--c),#d8c9b5);border-radius:2px}
.recommend-item strong{display:block;font-family:var(--serif);font-size:13px;line-height:1.5}
.recommend-item small{display:block;color:var(--muted);font-size:10px;margin-top:4px}
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.category-item{padding:22px 20px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:155px;background:rgba(255,255,255,.45)}
.category-item:hover{background:#fff}
.category-num{color:var(--coral);font-size:11px;font-weight:800}
.category-item h3{font:700 18px/1.4 var(--serif);margin:9px 0 6px}
.category-item p{color:var(--muted);font-size:12px;margin:0}
.scene-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:50px;align-items:center}
.scene-copy p{color:#d1ddd5;font-size:14px}
.step-list{counter-reset:step;list-style:none;margin:20px 0 0;padding:0}
.step-list li{counter-increment:step;display:grid;grid-template-columns:40px 1fr;gap:14px;padding:13px 0;border-top:1px solid rgba(255,255,255,.18)}
.step-list li:before{content:"0" counter(step);font-size:12px;font-weight:800;color:#efab93}
.step-list strong{display:block;font-size:14px}
.step-list span{display:block;color:#c2d1c8;font-size:12px}
.scene-preview{background:#f7f7f3;color:var(--ink);padding:24px;border-radius:3px}
.preview-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:15px;border-bottom:1px solid var(--line);font-size:12px;font-weight:700}
.preview-pills{display:flex;gap:7px;flex-wrap:wrap;margin:16px 0}
.preview-pills span{font-size:10px;border:1px solid var(--line);padding:4px 8px}
.preview-row{display:grid;grid-template-columns:54px 1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}
.preview-thumb{aspect-ratio:3/4;background:linear-gradient(145deg,#b8c9bd,#c89e8e);border-radius:2px}
.preview-row small{display:block;color:var(--muted);font-size:10px}
.preview-score{color:#8d5a36;font-weight:700}
.ranking-layout{display:grid;grid-template-columns:1fr 1fr;gap:42px}
.rank-list{list-style:none;margin:0;padding:0}
.rank-list li{display:grid;grid-template-columns:36px minmax(0,1fr) 74px 38px;gap:12px;align-items:center;padding:11px 0;border-bottom:1px solid var(--line)}
.rank-number{font-family:var(--serif);font-size:20px;color:#87918b}
.rank-list li:nth-child(-n+3) .rank-number{color:var(--coral);font-weight:700}
.rank-title{font-weight:700;font-size:13px;overflow-wrap:anywhere}
.rank-title small{display:block;font-weight:400;color:var(--muted);font-size:10px}
.rank-heat,.rank-score{font-size:11px;color:var(--muted);text-align:right}
.signal-band{display:grid;grid-template-columns:1.25fr repeat(3,1fr);background:var(--green);color:white}
.signal-intro,.signal-stat{padding:24px;border-right:1px solid rgba(255,255,255,.18)}
.signal-intro strong{display:block;font:700 18px/1.5 var(--serif)}
.signal-intro span,.signal-stat span{font-size:11px;color:#d1dfd6}
.signal-stat strong{display:block;font:700 25px/1.2 var(--serif);margin-bottom:6px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px 20px}
.news-item{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:start;padding-bottom:15px;border-bottom:1px solid var(--line)}
.news-thumb{aspect-ratio:4/3;background:linear-gradient(140deg,var(--c),#d9c6b7);position:relative;overflow:hidden}
.news-thumb:after{content:"";position:absolute;inset:20% 18%;border:1px solid rgba(255,255,255,.65);transform:rotate(-8deg)}
.news-date{font-size:10px;color:var(--coral);font-weight:700}
.news-item h3{font:700 14px/1.5 var(--serif);margin:4px 0}
.news-item p{font-size:11px;color:var(--muted);margin:0}
.compare{width:100%;border-collapse:collapse;border-spacing:0}
.compare th,.compare td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);font-size:12px;vertical-align:top}
.compare th{font-weight:700;color:var(--green);background:#e8eee8}
.compare td:first-child{font-weight:700;width:23%}
.compare-note{margin:15px 0 0;color:var(--muted);font-size:11px}
.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 34px}
.topic-item{display:grid;grid-template-columns:42px 1fr;gap:13px;padding:18px 0;border-bottom:1px solid var(--line)}
.topic-index{font:700 20px/1 var(--serif);color:var(--coral)}
.topic-item h3{font:700 16px/1.4 var(--serif);margin:0 0 5px}
.topic-item p{font-size:12px;color:var(--muted);margin:0}
.info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.info-item{border-top:2px solid var(--green);padding-top:13px}
.info-item h3{font-size:13px;margin:0 0 6px}
.info-item p{font-size:11px;color:var(--muted);margin:0}
.qa-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 30px}
.qa-item{padding:18px 0;border-top:1px solid var(--line)}
.qa-item h3{font:700 15px/1.5 var(--serif);margin:0 0 7px}
.qa-item p{font-size:12px;color:var(--muted);margin:0}
.faq-list{max-width:850px}
.faq-item{border-top:1px solid var(--line);padding:20px 0}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item h3{font:700 16px/1.5 var(--serif);margin:0 0 7px}
.faq-item p{font-size:13px;color:var(--muted);margin:0;max-width:760px}
.notice-strip{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:19px 22px;background:#e6ece5;border-left:3px solid var(--green)}
.notice-strip p{font-size:12px;margin:0;color:#53615a}
.notice-mark{font-size:12px;color:var(--green);font-weight:800;white-space:nowrap}
.extension{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}
.extension p{font-size:13px;color:var(--muted);margin:10px 0 0}
.extension-links{display:flex;flex-wrap:wrap;gap:9px}
.extension-links a{padding:9px 12px;border:1px solid var(--line);background:white;font-size:12px;font-weight:700}
.extension-links a:hover{border-color:var(--green);background:var(--mint)}
.site-footer{background:#1c3029;color:#edf2ed;padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:32px}
.footer-brand{font:700 18px/1.5 var(--serif);margin-bottom:9px}
.footer-about{max-width:290px;color:#bdcbc2;font-size:11px}
.footer-col h3{font-size:12px;margin:0 0 12px;color:#f1b49d}
.footer-col a{display:block;color:#c6d1ca;font-size:11px;margin:7px 0}
.footer-col a:hover{color:white}
.copyright{border-top:1px solid rgba(255,255,255,.16);padding-top:16px;color:#aebdb3;font-size:10px;display:flex;justify-content:space-between;gap:18px}
.sticky-cta{position:fixed;z-index:40;bottom:0;left:0;right:0;background:rgba(247,247,243,.97);border-top:1px solid var(--line);box-shadow:0 -5px 20px rgba(31,55,44,.08);padding:10px 0 calc(10px + env(safe-area-inset-bottom));transform:translateY(110%);transition:transform .25s ease}
.sticky-cta.is-visible{transform:translateY(0)}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.sticky-inner strong{font-family:var(--serif);font-size:14px}
.sticky-inner span{display:block;color:var(--muted);font-size:10px}
.sticky-inner .button{min-height:40px;background:var(--green);color:white}
.sticky-inner .button:hover{background:var(--green-dark)}
@media(max-width:1024px){
.container{width:min(100% - 40px,900px)}
.site-nav{gap:14px}
.site-nav a{font-size:12px}
.book-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.category-grid{grid-template-columns:repeat(2,1fr)}
.news-grid{grid-template-columns:repeat(2,1fr)}
.signal-band{grid-template-columns:1.2fr repeat(3,1fr)}
.info-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:767px){
html{scroll-padding-top:70px}
.container{width:calc(100% - 32px)}
.header-inner{height:66px}
.brand-mark{width:34px;height:34px}
.brand-name{font-size:13px;white-space:normal;max-width:210px}
.menu-toggle{display:grid;place-items:center}
.menu-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.menu-toggle span:before,.menu-toggle span:after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .18s}
.menu-toggle span:before{top:-6px}.menu-toggle span:after{top:6px}
.menu-toggle[aria-expanded="true"] span{background:transparent}
.menu-toggle[aria-expanded="true"] span:before{top:0;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:after{top:0;transform:rotate(-45deg)}
.site-nav{display:none;position:absolute;top:65px;left:0;right:0;padding:12px 16px 18px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch;gap:0}
.site-nav.is-open{display:flex;flex-direction:column}
.site-nav a{padding:11px 4px;border-bottom:1px solid var(--line)}
.hero{padding:16px 0 30px}
.hero-stage{min-height:500px}
.hero-content{width:100%;padding:34px 24px}
.hero h1{font-size:34px}
.hero-copy{font-size:13px}
.hero-note{right:15px;bottom:12px;font-size:9px}
.section{padding:46px 0}
.section-head{align-items:flex-start;flex-direction:column;gap:9px;margin-bottom:22px}
.section-head h2,.section h2{font-size:24px}
.trio{grid-template-columns:1fr}
.trio-item,.trio-item+.trio-item{padding:15px 0;border-left:0;border-bottom:1px solid var(--line)}
.trio-item:last-child{border-bottom:0}
.toolbar{align-items:flex-start;flex-direction:column}
.book-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:19px 11px}
.cover-art{padding:9px}.cover-art span{font-size:14px}
.book-title{font-size:12px}
.featured-book{grid-template-columns:38% 1fr;min-height:290px}
.featured-cover{min-height:290px;padding:12px}
.featured-cover span{font-size:19px}
.featured-text{padding:18px 14px}
.featured-text h3{font-size:18px}
.recommend-layout{grid-template-columns:1fr;gap:23px}
.recommend-list{grid-template-columns:repeat(2,1fr)}
.category-grid{grid-template-columns:1fr 1fr}
.category-item{padding:16px 13px;min-height:150px}
.scene-layout{grid-template-columns:1fr;gap:26px}
.ranking-layout{grid-template-columns:1fr;gap:0}
.rank-list li{grid-template-columns:31px minmax(0,1fr) 62px 34px;gap:8px}
.signal-band{grid-template-columns:1fr 1fr}
.signal-intro{grid-column:1/-1}
.signal-intro,.signal-stat{padding:17px}
.news-grid{grid-template-columns:1fr;gap:16px}
.topic-grid{grid-template-columns:1fr}
.info-grid{grid-template-columns:1fr 1fr;gap:18px}
.qa-grid{grid-template-columns:1fr}
.extension{grid-template-columns:1fr;gap:17px}
.footer-grid{grid-template-columns:1fr 1fr;gap:24px}
.copyright{flex-direction:column;gap:5px}
.sticky-inner strong{font-size:12px}
}
@media(max-width:520px){
.container{width:calc(100% - 28px)}
.hero-stage{min-height:475px}
.hero-content{padding:28px 18px}
.hero h1{font-size:30px}
.hero-subtitle{font-size:16px}
.button-row .button{padding:0 14px;min-height:43px}
.book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 12px}
.cover-art span{font-size:17px}
.book-title{font-size:13px}
.category-grid{grid-template-columns:1fr 1fr}
.category-item h3{font-size:16px}
.featured-book{grid-template-columns:1fr}
.featured-cover{min-height:250px}
.featured-text{padding:17px}
.recommend-list{grid-template-columns:1fr 1fr}
.preview-row{grid-template-columns:44px minmax(0,1fr) auto;gap:8px}
.compare th,.compare td{padding:11px 8px;font-size:10px}
.compare td:first-child{width:25%}
.info-grid{grid-template-columns:1fr 1fr}
.footer-grid{gap:22px 16px}
.notice-strip{align-items:flex-start;flex-direction:column;gap:8px}
.sticky-inner{gap:8px}
.sticky-inner .button{padding:0 12px;font-size:11px;min-height:38px}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}