/* roulang page: index */
:root{
  --green:#3F7D3A;
  --deep:#23452B;
  --bright:#A6D26F;
  --paper:#F7F4EC;
  --paper2:#F1EEE3;
  --apricot:#E6A15C;
  --ink:#1C241D;
  --line:#D8D3C4;
  --gray:#6D7469;
  --white:#FFFFFF;
  --r:6px;
  --shadow:0 8px 24px rgba(28,36,29,.06);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.24;margin:0}
p{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:126px}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;gap:18px;min-height:72px;padding:10px 24px;flex-wrap:wrap}
.brand-mark{display:inline-block;background:var(--green);color:var(--paper);font-family:var(--serif);font-size:15px;letter-spacing:.08em;line-height:1;padding:11px 13px;border-radius:6px;white-space:nowrap}
.brand-mark:hover{background:var(--deep)}
.main-nav{display:flex;gap:2px}
.main-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 13px;font-size:15px;color:var(--ink);border-radius:4px;transition:background .15s,color .15s}
.main-nav a:hover{background:#EDEADF;color:var(--deep)}
.main-nav a.active{color:var(--deep);font-weight:700;background:#EDF4E4}
.chips{margin-left:auto;display:flex;gap:8px}
.chip{display:inline-flex;align-items:center;min-height:32px;padding:5px 11px;font-size:13px;color:var(--gray);border:1px solid var(--line);border-radius:4px;transition:border-color .15s,color .15s,background .15s}
.chip:hover{border-color:var(--green);color:var(--green);background:#EEF4E6}
.anchorbar{border-top:1px solid var(--line);background:#FBF9F3}
.anchor-inner{display:flex;gap:24px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{display:inline-flex;align-items:center;min-height:46px;font-size:14px;color:var(--gray);white-space:nowrap;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.anchor-inner a:hover{color:var(--green);border-bottom-color:var(--bright)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;font-size:15.5px;font-weight:600;border-radius:4px;border:1px solid transparent;cursor:pointer;transition:transform .15s,background .15s,box-shadow .15s}
.btn-primary{background:var(--deep);color:var(--paper)}
.btn-primary:hover{background:#1A3520;transform:translateY(-1px);box-shadow:0 10px 22px rgba(28,36,29,.18)}
.btn-ghost{background:transparent;border-color:var(--green);color:var(--deep)}
.btn-ghost:hover{background:#EDF4E4;transform:translateY(-1px)}
.btn:focus-visible{outline:3px solid rgba(63,125,58,.25);outline-offset:2px}

/* hero */
.hero{padding:58px 0 72px;background:linear-gradient(180deg,#F7F4EC 0%,#F1EEE3 100%);border-bottom:1px solid var(--line)}
.hero-top{max-width:820px;margin:0 auto;text-align:center}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.16em;color:var(--green);border:1px solid var(--line);background:#FFFDF7;border-radius:3px;padding:5px 12px;margin-bottom:20px}
.hero h1{font-size:clamp(34px,5vw,58px);letter-spacing:.01em;color:var(--ink)}
.hl{color:var(--green);border-bottom:6px solid rgba(166,210,111,.55);padding-bottom:2px}
.hero-sub{margin-top:18px;font-size:17.5px;color:var(--deep);font-weight:600}
.hero-text{margin:14px auto 0;max-width:660px;font-size:15.5px;color:var(--gray);line-height:1.8}
.hero-actions{display:flex;justify-content:center;gap:12px;margin-top:26px;flex-wrap:wrap}
.stage-wrap{display:grid;grid-template-columns:1fr 1.9fr 1fr;gap:24px;align-items:center;margin-top:46px}
.stage-main{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 18px 42px rgba(28,36,29,.13)}
.stage-main img{width:100%;aspect-ratio:16/10;object-fit:cover}
.stage-points{display:grid;gap:14px}
.stage-points li{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;font-size:13.5px;color:var(--gray);line-height:1.65}
.stage-points strong{display:block;font-family:var(--serif);font-size:16.5px;color:var(--ink);margin-bottom:5px}

/* sections */
.sec{padding:74px 0}
.sec-alt{background:var(--white)}
.sec-head{max-width:780px;margin-bottom:34px}
.sec-head h2{font-size:clamp(23px,3vw,33px);color:var(--deep)}
.sec-head p{margin-top:12px;font-size:15.5px;color:var(--gray);max-width:680px;line-height:1.8}
.sec-foot{margin-top:28px;font-size:14.5px;color:var(--gray)}
.sec-foot a{color:var(--green);font-weight:600;border-bottom:1px solid var(--bright)}

/* pain */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pain{background:#fff;border:1px solid var(--line);border-left:3px solid var(--bright);border-radius:var(--r);padding:20px 20px 22px;transition:border-color .18s,box-shadow .18s,transform .18s}
.pain:hover{border-left-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
.pain .num{display:block;font-family:var(--serif);font-size:14px;color:var(--apricot);letter-spacing:.1em;margin-bottom:8px}
.pain h3{font-size:18px;color:var(--deep)}
.pain p{margin-top:9px;font-size:14px;color:var(--gray);line-height:1.7}

/* solution */
.sol-wrap{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start}
.sol-wrap h2{font-size:clamp(23px,3vw,33px);color:var(--deep)}
.sol-wrap>div>p{margin-top:14px;font-size:15.5px;color:var(--gray);line-height:1.85}
.sol-list{display:grid;gap:14px}
.sol-list li{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.sol-list strong{display:block;font-family:var(--serif);font-size:17px;color:var(--deep);margin-bottom:4px}
.sol-list span{font-size:14px;color:var(--gray);line-height:1.7}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.step{position:relative;padding:0 22px 0 0}
.step::before{content:"";position:absolute;top:17px;left:0;right:22px;height:1px;background:var(--line)}
.step:last-child::before{right:0}
.step .sn{position:relative;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:#fff;border:1px solid var(--green);color:var(--green);font-family:var(--serif);font-size:15px;font-variant-numeric:tabular-nums;margin-bottom:16px}
.step h3{font-size:18px;color:var(--deep)}
.step p{margin-top:8px;font-size:14px;color:var(--gray);line-height:1.7}

/* cards */
.card-grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.vcard{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s,border-color .18s}
.vcard:hover{transform:translateY(-3px);border-color:var(--green);box-shadow:0 14px 30px rgba(28,36,29,.13)}
.vcard img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#E8E4D6}
.vcard-body{padding:13px 15px 16px}
.vcard h3{font-size:16px;line-height:1.45;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vcard:hover h3{text-decoration:underline;text-decoration-color:var(--bright);text-underline-offset:4px}
.vmeta{display:flex;flex-wrap:wrap;gap:10px;margin-top:9px;font-size:12.8px;color:var(--gray);font-variant-numeric:tabular-nums}
.tag{display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:4px 7px;border:1px solid var(--line);border-radius:3px;color:var(--gray);background:#FBF9F3}
.tag-green{border-color:#C6DEA6;background:#EEF4E4;color:var(--green)}
.statbar{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.statbar span{font-size:13px;color:var(--gray);border:1px solid var(--line);border-radius:3px;padding:5px 10px;font-variant-numeric:tabular-nums}

/* channels */
.chan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.chan{display:block;background:#fff;border:1px solid var(--line);border-left:3px solid var(--bright);border-radius:var(--r);padding:18px 20px;transition:transform .18s,box-shadow .18s,border-color .18s}
.chan:hover{transform:translateY(-2px);border-left-color:var(--green);box-shadow:var(--shadow)}
.chan h3{font-size:19px;color:var(--deep)}
.chan p{margin-top:8px;font-size:14px;color:var(--gray);line-height:1.7}

/* rank */
.rank-list{display:grid;grid-template-rows:repeat(5,auto);grid-auto-flow:column;gap:0 34px}
.rank-list li{display:flex;align-items:center;gap:14px;padding:13px 12px;border-bottom:1px solid var(--line);border-radius:4px}
.rank-no{flex:none;width:32px;font-family:var(--serif);font-size:20px;color:var(--gray);font-variant-numeric:tabular-nums;text-align:left}
.rank-title{font-size:15.5px;color:var(--ink);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-play{font-size:13px;color:var(--gray);font-variant-numeric:tabular-nums;flex:none}
.rank-list li.top3{background:#EEF4E4}
.rank-list li.top3 .rank-no{color:var(--green);font-weight:700}

/* quotes */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quote{background:var(--paper2);border-left:3px solid var(--green);border-radius:0 var(--r) var(--r) 0;padding:20px 22px}
.quote p{font-size:14.8px;color:#2C332C;line-height:1.85}
.quote span{display:block;margin-top:12px;font-size:13px;color:var(--gray)}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px}
.scene h3{font-size:17px;color:var(--deep)}
.scene p{margin-top:8px;font-size:14px;color:var(--gray);line-height:1.7}

/* news */
.ncard{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .18s,box-shadow .18s,border-color .18s}
.ncard:hover{transform:translateY(-3px);border-color:var(--green);box-shadow:0 14px 30px rgba(28,36,29,.12)}
.ncard img{width:100%;aspect-ratio:4/3;object-fit:cover;background:#E8E4D6}
.ncard div{padding:14px 16px 18px}
.ncard h3{font-size:16px;line-height:1.5;color:var(--ink)}
.ncard:hover h3{text-decoration:underline;text-decoration-color:var(--bright);text-underline-offset:4px}
.ncard time{display:block;margin-top:9px;font-size:13px;color:var(--gray);font-variant-numeric:tabular-nums}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.metric{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px 14px;text-align:center}
.metric b{display:block;font-family:var(--serif);font-size:32px;color:var(--deep);line-height:1.1;font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--gray)}

/* faq */
.faq{max-width:900px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;overflow:hidden}
.faq details[open]{border-color:var(--green)}
.faq summary{position:relative;list-style:none;cursor:pointer;padding:16px 48px 16px 18px;min-height:52px;font-family:var(--serif);font-size:17px;color:var(--deep)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--green);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq p{padding:0 18px 18px;font-size:15px;color:#3A423A;line-height:1.82}

/* cta */
.cta{background:var(--deep);color:#E8EDE3;padding:70px 0}
.cta h2{color:var(--paper);font-size:clamp(23px,3vw,33px)}
.cta p{margin-top:14px;max-width:640px;font-size:15.5px;line-height:1.85;color:#C8D3C1}
.search-row{display:flex;gap:10px;max-width:560px;margin:26px 0 22px}
.search-row input{flex:1;min-height:48px;padding:0 14px;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--ink);font-size:15px}
.search-row input::placeholder{color:#9AA295}
.search-row input:focus{outline:none;border-color:var(--bright);box-shadow:0 0 0 3px rgba(166,210,111,.35)}
.search-row button{min-height:48px;padding:0 22px;border:1px solid var(--bright);border-radius:4px;background:var(--bright);color:var(--deep);font-weight:600;cursor:pointer;transition:background .15s}
.search-row button:hover{background:#B9DE8A}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta .btn-ghost{border-color:#7FA37C;color:#E8EDE3}
.cta .btn-ghost:hover{background:#2E5734}
.cta .btn-primary{background:var(--bright);color:var(--deep)}
.cta .btn-primary:hover{background:#B9DE8A}

/* footer */
.site-footer{background:#161C16;color:#B9C1B6;padding-top:54px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;padding-bottom:38px}
.site-footer h4{font-size:16px;color:#F1EFE6;margin-bottom:14px}
.foot-brand .brand-mark{margin-bottom:14px}
.foot-brand p{font-size:14px;line-height:1.8;color:#9AA395;max-width:300px}
.foot-grid ul{display:grid;gap:10px}
.foot-grid a{font-size:14px;color:#B9C1B6;transition:color .15s}
.foot-grid a:hover{color:var(--bright)}
.copyright{border-top:1px solid #2C352B;padding:18px 0;font-size:13px;color:#7F887C}

/* responsive */
@media (max-width:1024px){
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(3,1fr)}
  .rank-list{grid-auto-flow:row;grid-template-rows:none;grid-template-columns:1fr;gap:0}
  .stage-wrap{grid-template-columns:1fr;gap:18px}
  .stage-points{grid-template-columns:repeat(2,1fr)}
  .sol-wrap{grid-template-columns:1fr;gap:26px}
  .steps{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .step::before{display:none}
}
@media (max-width:768px){
  .sec{padding:48px 0}
  .hero{padding:40px 0 50px}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}
  .chan-grid{grid-template-columns:repeat(2,1fr)}
  .quote-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .topbar-inner{padding:10px 16px;gap:10px}
  .brand-mark{font-size:13px;padding:9px 10px}
  .main-nav a{font-size:14px;padding:0 10px}
  .chips{gap:6px}
  .chip{font-size:12px;padding:4px 8px;min-height:28px}
  .hero h1{font-size:34px}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .stage-points{grid-template-columns:1fr}
  .pain-grid,.grid-4,.grid-3,.chan-grid,.scene-grid,.metrics,.steps{grid-template-columns:1fr}
  .search-row{flex-direction:column}
  .search-row button{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .sec-head h2{font-size:22px}
  .rank-title{white-space:normal}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}