/* roulang page: index */
:root{
  --brand:#1d4ed8;
  --brand-dark:#16379f;
  --brand-light:#e9eefc;
  --brand-soft:#f4f7fe;
  --accent:#0ea5e9;
  --hot:#f97316;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#6b7a90;
  --line:#e5ebf4;
  --bg:#f6f9fd;
  --surface:#ffffff;
  --dark:#070d1c;
  --dark-2:#101a33;
  --r-xs:8px;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:22px;
  --r-xl:30px;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 22px -10px rgba(15,23,42,.16);
  --sh-3:0 24px 48px -24px rgba(15,23,42,.28);
  --wrap:1180px;
  --ease:.24s cubic-bezier(.4,.2,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:15.5px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.3px;line-height:1.32}
p{margin:0}
::selection{background:var(--brand);color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:8px}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.4px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:11px;
  background:linear-gradient(135deg,#2f66f5,#17379f);
  color:#fff;display:grid;place-items:center;
  font-size:15px;font-weight:800;
  box-shadow:0 10px 20px -10px rgba(29,78,216,.95);
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-links a{
  display:block;padding:9px 15px;border-radius:11px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:var(--ease);
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand)}
.nav-links a.active{background:var(--brand);color:#fff;box-shadow:0 10px 20px -12px rgba(29,78,216,.9)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.cmd-search{
  display:flex;align-items:center;gap:9px;
  background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:7px 10px 7px 12px;
  box-shadow:var(--sh-1);width:238px;
  transition:var(--ease);
}
.cmd-search:hover{border-color:#c9d8f4}
.cmd-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(29,78,216,.1)}
.cmd-search svg{flex-shrink:0;color:var(--muted)}
.cmd-search input{
  border:0;outline:none;background:transparent;width:100%;
  font-size:13.5px;line-height:1.5;
}
.cmd-search input::placeholder{color:#9aa8bd}
.cmd-search kbd{
  font-size:11px;font-family:inherit;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;
  padding:1px 5px;background:#f7f9fc;flex-shrink:0;
}
.menu-btn{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;transition:var(--ease);
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:12px;
  font-size:14.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:var(--ease);white-space:nowrap;
}
.btn-lg{padding:13px 24px;font-size:15.5px;border-radius:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 14px 26px -14px rgba(29,78,216,.95)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 18px 30px -14px rgba(29,78,216,1)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2);box-shadow:var(--sh-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(110% 130% at 8% 0%, #1b2f6b 0%, #0c1530 46%, #05080f 100%);
  padding:80px 0 92px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(75% 65% at 50% 0%, #000 20%, transparent 100%);
  mask-image:radial-gradient(75% 65% at 50% 0%, #000 20%, transparent 100%);
}
.hero-glow{
  position:absolute;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle, rgba(47,102,245,.45), transparent 68%);
  top:-230px;right:-120px;filter:blur(6px);pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.12fr .88fr;
  gap:56px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  color:#bcd0ff;background:rgba(47,102,245,.18);
  border:1px solid rgba(120,160,255,.32);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:#5fe3a1;box-shadow:0 0 0 4px rgba(95,227,161,.18)}
.hero h1{
  font-size:clamp(27px,3.5vw,42px);
  line-height:1.24;letter-spacing:-.8px;margin-bottom:16px;
}
.hero h1 em{font-style:normal;color:#7fa6ff}
.hero-sub{
  font-size:17px;font-weight:600;color:#cfdcff;
  margin-bottom:16px;letter-spacing:-.1px;
}
.hero-desc{color:#9fb0cf;font-size:15px;line-height:1.85;max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:#93a6c8}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{
  content:"";width:16px;height:16px;border-radius:50%;flex-shrink:0;
  background:rgba(95,227,161,.16);
  border:1px solid rgba(95,227,161,.5);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235fe3a1' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size:11px;background-repeat:no-repeat;background-position:center;
}
.hero-visual{position:relative;height:404px}
.poster{
  position:absolute;width:198px;height:290px;border-radius:var(--r-lg);
  padding:20px 18px;color:#fff;overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 34px 60px -32px rgba(0,0,0,.95);
  transition:transform .4s cubic-bezier(.4,.2,.2,1);
  display:flex;flex-direction:column;
}
.poster::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg, rgba(255,255,255,.07) 0 1px, transparent 1px 13px);
  opacity:.55;
}
.poster:hover{transform:translateY(-8px) rotate(0deg) !important;z-index:9}
.poster .p-tag{
  font-size:11px;font-weight:700;letter-spacing:.12em;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.22);
  border-radius:999px;padding:3px 10px;align-self:flex-start;
  position:relative;z-index:2;
}
.poster h3{font-size:19px;margin:auto 0 8px;position:relative;z-index:2;letter-spacing:-.2px}
.poster p{font-size:12.5px;color:rgba(255,255,255,.78);line-height:1.6;position:relative;z-index:2}
.poster .p-hot{
  position:relative;z-index:2;margin-top:12px;
  font-size:12px;font-weight:700;color:#ffd9b0;
  display:flex;align-items:center;gap:6px;
}
.poster .p-hot b{color:#fff;font-size:14px}
.p1{left:0;top:64px;transform:rotate(-9deg);background:linear-gradient(158deg,#2f57e0,#0b1440)}
.p2{left:112px;top:0;transform:rotate(3deg);z-index:4;background:linear-gradient(158deg,#0ea5e9,#082445)}
.p3{left:224px;top:76px;transform:rotate(12deg);background:linear-gradient(158deg,#7c3aed,#170f3d)}

/* ---------- Sections ---------- */
.sec{padding:76px 0}
.sec.white{background:#fff}
.sec.dark{
  background:linear-gradient(180deg,#080f21,#0d1730);
  color:#fff;
}
.sec-head{max-width:740px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:800;
  letter-spacing:.1em;color:var(--brand);
  background:var(--brand-light);
  padding:5px 13px;border-radius:999px;margin-bottom:14px;
}
.sec.dark .eyebrow{color:#9db9ff;background:rgba(47,102,245,.2)}
.sec-head h2{font-size:clamp(22px,2.7vw,31px);margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15px;line-height:1.85}
.sec.dark .sec-head p{color:#9baccb}
.sec.dark h2{color:#fff}

.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:26px;
  box-shadow:var(--sh-1);transition:var(--ease);
  position:relative;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#cfdcf5}
.card h3{font-size:17px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14px;line-height:1.8}
.card-num{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-light);color:var(--brand);
  font-weight:800;font-size:15px;margin-bottom:16px;
}

/* 入口矩阵 */
.entry-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);transition:var(--ease);
  display:flex;flex-direction:column;gap:10px;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#cfdcf5}
.entry-icon{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,#eef3ff,#dfe8ff);color:var(--brand);
  font-size:17px;font-weight:800;
}
.entry-card h3{font-size:16.5px}
.entry-card p{color:var(--muted);font-size:13.8px;line-height:1.78;flex:1}
.entry-more{
  font-size:13.5px;font-weight:700;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.entry-more::after{content:"→";transition:var(--ease)}
.entry-card:hover .entry-more::after{transform:translateX(4px)}

/* 痛点 */
.pain-card{
  background:#fff;border:1px solid var(--line);border-left:4px solid #f97316;
  border-radius:var(--r-sm);padding:22px 24px;box-shadow:var(--sh-1);
  transition:var(--ease);
}
.pain-card:hover{box-shadow:var(--sh-2);transform:translateX(2px)}
.pain-card h3{font-size:16px;margin-bottom:8px}
.pain-card p{color:var(--muted);font-size:14px;line-height:1.8}
.pain-card .tag-x{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.08em;
  color:#c2410c;background:#fff2e8;border-radius:999px;padding:3px 10px;margin-bottom:10px;
}

/* 步骤 */
.steps{counter-reset:step;display:grid;gap:0}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:22px;
  padding:26px 0;border-bottom:1px dashed var(--line);
}
.step:last-child{border-bottom:0;padding-bottom:0}
.step:first-child{padding-top:0}
.step-no{
  counter-increment:step;width:52px;height:52px;border-radius:16px;
  display:grid;place-items:center;font-weight:800;font-size:18px;
  background:linear-gradient(135deg,#2f66f5,#17379f);color:#fff;
  box-shadow:0 14px 26px -14px rgba(29,78,216,.95);
}
.step-no::before{content:counter(step,decimal-leading-zero)}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.2px;line-height:1.82}

/* 数据 */
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 22px;box-shadow:var(--sh-1);transition:var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.stat b{
  display:block;font-size:32px;font-weight:800;letter-spacing:-1px;
  color:var(--brand);line-height:1.2;margin-bottom:6px;
}
.stat span{font-size:14px;font-weight:700;display:block;margin-bottom:6px}
.stat em{font-style:normal;font-size:13px;color:var(--muted);line-height:1.7;display:block}

/* 列表 */
.list-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);overflow:hidden;
}
.list-row{
  display:flex;align-items:center;gap:18px;
  padding:20px 26px;border-bottom:1px solid var(--line);
  transition:var(--ease);
}
.list-row:last-child{border-bottom:0}
.list-row:hover{background:var(--brand-soft)}
.list-date{
  font-size:12.5px;font-weight:800;color:var(--brand);
  background:var(--brand-light);border-radius:8px;
  padding:5px 10px;flex-shrink:0;letter-spacing:.02em;
}
.list-body{flex:1;min-width:0}
.list-body h3{font-size:15.5px;margin-bottom:4px}
.list-body p{color:var(--muted);font-size:13.5px;line-height:1.7}
.list-arrow{color:#c4d0e3;font-size:18px;flex-shrink:0;transition:var(--ease)}
.list-row:hover .list-arrow{color:var(--brand);transform:translateX(4px)}

/* 资讯卡 */
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:var(--ease);
  display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.news-thumb{
  height:132px;position:relative;overflow:hidden;
  background:linear-gradient(140deg,#1b2f6b,#0c1530);
}
.news-card:nth-child(2) .news-thumb{background:linear-gradient(140deg,#0e7490,#0b2b46)}
.news-card:nth-child(3) .news-thumb{background:linear-gradient(140deg,#4c1d95,#1b1440)}
.news-thumb::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg, rgba(255,255,255,.08) 0 1px, transparent 1px 14px);
}
.news-thumb span{
  position:absolute;left:18px;bottom:16px;z-index:2;
  font-size:12px;font-weight:700;color:#dbe6ff;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  border-radius:999px;padding:4px 12px;
}
.news-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:16.5px}
.news-body p{color:var(--muted);font-size:13.8px;line-height:1.8;flex:1}
.news-meta{font-size:12.5px;color:#94a3b8;display:flex;gap:14px}

/* 时间线 */
.timeline{position:relative;padding-left:26px}
.timeline::before{
  content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(29,78,216,.08));
  border-radius:2px;
}
.tl-item{position:relative;padding:0 0 26px 0}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-26px;top:8px;
  width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);
  box-shadow:0 0 0 4px rgba(29,78,216,.1);
}
.tl-item h3{font-size:15.5px;margin-bottom:6px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-item p{color:var(--muted);font-size:13.8px;line-height:1.8}
.ver{
  font-size:12px;font-weight:800;color:var(--brand);
  background:var(--brand-light);border-radius:7px;padding:2px 9px;
  letter-spacing:.02em;
}

/* 多端 */
.device-panel{
  display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center;
}
.device-visual{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
}
.device-box{
  border-radius:var(--r-md);padding:22px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.12);
  transition:var(--ease);
}
.device-box:hover{background:rgba(255,255,255,.09);transform:translateY(-4px)}
.device-box strong{display:block;font-size:15px;margin-bottom:8px;color:#fff}
.device-box span{font-size:13px;color:#9baccb;line-height:1.72;display:block}
.device-box .dev-ico{
  width:36px;height:36px;border-radius:11px;margin-bottom:14px;
  background:rgba(47,102,245,.24);display:grid;place-items:center;
  color:#9db9ff;font-weight:800;font-size:15px;
}
.device-copy h2{font-size:clamp(22px,2.7vw,30px);margin-bottom:14px;color:#fff}
.device-copy p{color:#9baccb;font-size:15px;line-height:1.86;margin-bottom:20px}
.device-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14px;color:#c2cee6;padding:9px 0;
}
.device-list li::before{
  content:"";width:7px;height:7px;border-radius:50%;margin-top:9px;
  background:#5fe3a1;flex-shrink:0;
}

/* 口碑气泡 */
.bubble{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);transition:var(--ease);
}
.bubble:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.bubble p{font-size:14.2px;color:var(--ink-2);line-height:1.82;margin-bottom:18px}
.bubble-user{display:flex;align-items:center;gap:12px}
.avatar{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;font-weight:800;font-size:15px;color:#fff;
  background:linear-gradient(135deg,#2f66f5,#17379f);
}
.bubble:nth-child(2) .avatar{background:linear-gradient(135deg,#0ea5e9,#0c4a6e)}
.bubble:nth-child(3) .avatar{background:linear-gradient(135deg,#7c3aed,#3b1a7a)}
.bubble:nth-child(4) .avatar{background:linear-gradient(135deg,#f97316,#9a3412)}
.bubble-user b{display:block;font-size:14px}
.bubble-user span{font-size:12.5px;color:var(--muted)}

/* 观点 */
.quote-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-1);position:relative;transition:var(--ease);
}
.quote-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.quote-card::before{
  content:"”";position:absolute;right:22px;top:2px;
  font-size:64px;line-height:1;color:var(--brand-light);font-weight:800;
}
.quote-card h3{font-size:16.5px;margin-bottom:12px;position:relative}
.quote-card p{color:var(--muted);font-size:14px;line-height:1.85;position:relative}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  margin-bottom:12px;overflow:hidden;transition:var(--ease);
}
.faq-item:hover{border-color:#cfdcf5}
.faq-item.open{border-color:#bcd0f5;box-shadow:var(--sh-2)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;cursor:pointer;
  padding:20px 56px 20px 24px;font-size:15.5px;font-weight:700;
  position:relative;transition:var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q::after{
  content:"";position:absolute;right:24px;top:50%;
  width:10px;height:10px;margin-top:-6px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);transition:var(--ease);
}
.faq-item.open .faq-q{color:var(--brand)}
.faq-item.open .faq-q::after{transform:rotate(-135deg);margin-top:-2px;border-color:var(--brand)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .34s cubic-bezier(.4,.2,.2,1);
}
.faq-a p{
  padding:0 24px 22px;color:var(--muted);font-size:14.2px;line-height:1.88;
}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;color:#fff;text-align:center;
  background:linear-gradient(125deg,#16379f,#2f66f5 52%,#1e3a9e);
  border-radius:var(--r-xl);
  padding:64px 40px;box-shadow:0 34px 70px -34px rgba(29,78,216,.75);
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(70% 90% at 50% 0%, #000, transparent);
  mask-image:radial-gradient(70% 90% at 50% 0%, #000, transparent);
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,3vw,32px);margin-bottom:14px}
.cta-band p{
  color:rgba(255,255,255,.86);font-size:15px;line-height:1.86;
  max-width:660px;margin:0 auto 30px;
}

/* Footer */
.site-footer{
  background:#080f21;color:#93a3bf;padding:60px 0 28px;margin-top:80px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.09);
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand .logo-mark{width:32px;height:32px;border-radius:10px;font-size:14px}
.footer-brand p,
.footer-col p{font-size:13.6px;line-height:1.86;color:#8595b3}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:13.8px;color:#93a3bf;transition:var(--ease)}
.footer-col a:hover{color:#fff;padding-left:3px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  align-items:center;padding-top:24px;font-size:13px;color:#6b7c9c;
}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .cmd-search{width:190px}
  .g4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:960px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:14px 24px 20px;margin:0;
    box-shadow:0 20px 34px -24px rgba(15,23,42,.35);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;border-radius:11px}
  .menu-btn{display:inline-flex}
  .cmd-search{width:170px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-visual{height:340px;width:356px;margin:0 auto;transform:scale(.88);transform-origin:center center}
  .device-panel{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:780px){
  .sec{padding:60px 0}
  .g3{grid-template-columns:repeat(2,1fr)}
  .hero{padding:60px 0 70px}
  .cta-band{padding:48px 24px;border-radius:var(--r-lg)}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .cmd-search{display:none}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .hero-visual{display:none}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .list-row{padding:16px 18px;gap:12px;align-items:flex-start;flex-wrap:wrap}
  .list-date{order:-1}
  .step{grid-template-columns:1fr;gap:14px}
  .footer-grid{grid-template-columns:1fr}
  .device-visual{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  body{font-size:15px}
  .hero h1{font-size:26px}
  .stat b{font-size:27px}
}

/* roulang page: category1 */
:root{
 --brand:#1d4ed8;
 --brand-dark:#16379f;
 --brand-light:#e9eefc;
 --brand-soft:#f4f7fe;
 --accent:#0ea5e9;
 --hot:#f97316;
 --ink:#0f172a;
 --ink-2:#334155;
 --muted:#6b7a90;
 --line:#e5ebf4;
 --bg:#f6f9fd;
 --surface:#ffffff;
 --dark:#070d1c;
 --dark-2:#101a33;
 --r-xs:8px;
 --r-sm:12px;
 --r-md:16px;
 --r-lg:22px;
 --r-xl:30px;
 --sh-1:0 1px 2px rgba(15,23,42,.05);
 --sh-2:0 8px 22px -10px rgba(15,23,42,.16);
 --sh-3:0 24px 48px -24px rgba(15,23,42,.28);
 --wrap:1180px;
 --ease:.24s cubic-bezier(.4,.2,.2,1);
}
/* roulang page: category1 */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 font-size:15.5px;line-height:1.75;color:var(--ink);background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.5px;line-height:1.3}
p{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:8px}
.wrap{width:min(100% - 40px,var(--wrap));margin-inline:auto}
/* ---------- Header / Nav ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(255,255,255,.88);
 backdrop-filter:saturate(180%) blur(14px);
 -webkit-backdrop-filter:saturate(180%) blur(14px);
 border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:20px;height:72px;position:relative}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.4px;flex-shrink:0}
.logo-mark{
 width:34px;height:34px;border-radius:11px;
 background:linear-gradient(135deg,#2f66f5,#17379f);
 color:#fff;display:grid;place-items:center;
 font-size:15px;font-weight:800;
 box-shadow:0 10px 20px -10px rgba(29,78,216,.95);
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-links a{
 display:block;padding:9px 15px;border-radius:11px;
 font-size:14.5px;font-weight:600;color:var(--ink-2);
 transition:var(--ease);
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand)}
.nav-links a.active{background:var(--brand);color:#fff;box-shadow:0 10px 20px -12px rgba(29,78,216,.9)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.cmd-search{
 display:flex;align-items:center;gap:9px;
 background:#fff;border:1px solid var(--line);
 border-radius:12px;padding:7px 10px 7px 12px;
 box-shadow:var(--sh-1);width:238px;transition:var(--ease);
}
.cmd-search:hover{border-color:#c9d8f4}
.cmd-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(29,78,216,.1)}
.cmd-search svg{flex-shrink:0;color:var(--muted)}
.cmd-search input{border:0;outline:none;background:transparent;width:100%;font-size:13.5px;line-height:1.5}
.cmd-search input::placeholder{color:#9aa8bd}
.cmd-search kbd{
 font-size:11px;font-family:inherit;color:var(--muted);
 border:1px solid var(--line);border-radius:6px;
 padding:1px 5px;background:#f7f9fc;flex-shrink:0;
}
.menu-btn{
 display:none;width:42px;height:42px;border-radius:12px;
 border:1px solid var(--line);background:#fff;cursor:pointer;
 align-items:center;justify-content:center;transition:var(--ease);
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand)}
/* ---------- Buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:10px 18px;border-radius:12px;
 font-size:14.5px;font-weight:700;
 border:1px solid transparent;cursor:pointer;
 transition:var(--ease);white-space:nowrap;
}
.btn-lg{padding:13px 24px;font-size:15.5px;border-radius:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 14px 26px -14px rgba(29,78,216,.95)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 18px 30px -14px rgba(29,78,216,1)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2);box-shadow:var(--sh-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
/* ---------- Category Hero ---------- */
.cat-hero{
 position:relative;overflow:hidden;
 background:linear-gradient(180deg,#eef4ff 0%,#f6f9fd 72%,#f6f9fd 100%);
 border-bottom:1px solid var(--line);
 padding:60px 0 72px;
}
.cat-hero::before{
 content:"";position:absolute;inset:0;pointer-events:none;
 background-image:radial-gradient(circle at 1px 1px, rgba(29,78,216,.16) 1px, transparent 0);
 background-size:26px 26px;opacity:.55;
 -webkit-mask-image:radial-gradient(72% 62% at 28% 0%,#000 10%,transparent 78%);
 mask-image:radial-gradient(72% 62% at 28% 0%,#000 10%,transparent 78%);
}
.cat-hero::after{
 content:"";position:absolute;width:520px;height:520px;border-radius:50%;
 background:radial-gradient(circle,rgba(14,165,233,.20),transparent 68%);
 top:-260px;right:-140px;pointer-events:none;
}
.cat-hero-grid{
 position:relative;z-index:2;
 display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center;
}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:.06em;
 color:var(--brand);background:rgba(29,78,216,.08);
 border:1px solid rgba(29,78,216,.18);
 padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:#12b981;box-shadow:0 0 0 4px rgba(18,185,129,.16)}
.cat-hero h1{font-size:clamp(27px,3.4vw,40px);line-height:1.24;letter-spacing:-.9px}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.lede{color:var(--ink-2);font-size:16px;line-height:1.85;max-width:620px;margin-top:16px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{
 font-size:12.5px;font-weight:600;color:var(--ink-2);
 background:#fff;border:1px solid var(--line);
 padding:5px 12px;border-radius:999px;box-shadow:var(--sh-1);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-note{margin-top:18px;font-size:13.4px;color:var(--muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hero-note b{color:var(--brand);font-weight:700}
/* ---------- Panel ---------- */
.panel{
 background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);
 box-shadow:var(--sh-3);padding:24px;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.panel-head h2{font-size:16.5px;font-weight:800}
.panel-head span{font-size:12.5px;color:var(--muted)}
.pill{font-size:11.5px;font-weight:700;color:#0f766e;background:#e6fbf5;border:1px solid #bfeee2;padding:3px 10px;border-radius:999px}
.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stat{
 background:var(--brand-soft);border:1px solid var(--line);
 border-radius:var(--r-md);padding:15px 16px;transition:var(--ease);
}
.stat:hover{border-color:#c9d8f4;background:#fff;box-shadow:var(--sh-2)}
.stat b{display:block;font-size:24px;line-height:1.2;color:var(--brand);letter-spacing:-1px}
.stat span{display:block;font-size:12.6px;color:var(--muted);margin-top:4px}
.panel-foot{
 margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
 display:flex;align-items:center;gap:12px;flex-wrap:wrap;
}
.bar{flex:1;min-width:150px;height:7px;border-radius:999px;background:#e8eef8;overflow:hidden}
.bar i{display:block;height:100%;width:86%;border-radius:999px;background:linear-gradient(90deg,#2f66f5,#0ea5e9)}
.panel-foot span{font-size:12.6px;color:var(--muted)}
/* ---------- Sections ---------- */
.section{padding:74px 0}
.section.tint{background:#fff}
.section.soft{background:var(--brand-soft)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:34px}
.sec-tag{
 display:inline-block;font-size:12px;font-weight:800;letter-spacing:.1em;
 color:var(--brand);background:var(--brand-light);
 padding:4px 12px;border-radius:999px;margin-bottom:12px;
}
.sec-head h2{font-size:clamp(21px,2.4vw,29px)}
.sec-head p{color:var(--muted);font-size:14.6px;margin-top:10px;max-width:660px}
.sec-side{font-size:13.6px;color:var(--muted);white-space:nowrap}
/* ---------- Grids ---------- */
.grid{display:grid;gap:18px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
/* ---------- Category cards ---------- */
.cat-card{
 position:relative;display:block;
 background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
 padding:24px 22px 22px;box-shadow:var(--sh-1);transition:var(--ease);overflow:hidden;
}
.cat-card::before{
 content:"";position:absolute;left:0;top:0;height:3px;width:100%;
 background:linear-gradient(90deg,#2f66f5,#0ea5e9);
 opacity:0;transition:var(--ease);
}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--sh-3);border-color:#c9d8f4}
.cat-card:hover::before{opacity:1}
.cat-card .idx{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--brand)}
.cat-card h3{font-size:17.5px;margin:10px 0 8px}
.cat-card p{color:var(--muted);font-size:14px;line-height:1.8}
.cat-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-light);padding:3px 10px;border-radius:999px}
.tag.hot{color:#c2410c;background:#fff2e8}
.tag.cool{color:#0f766e;background:#e6fbf5}
/* ---------- Row list ---------- */
.row-list{display:flex;flex-direction:column;gap:12px}
.row-item{
 display:grid;grid-template-columns:58px 1fr auto;gap:18px;align-items:center;
 background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
 padding:18px 22px;box-shadow:var(--sh-1);transition:var(--ease);
}
.row-item:hover{border-color:#c9d8f4;box-shadow:var(--sh-2);transform:translateX(4px)}
.row-item .no{font-size:19px;font-weight:800;color:#c3d4f0;letter-spacing:-.5px}
.row-item h3{font-size:16px}
.row-item p{color:var(--muted);font-size:13.8px;margin-top:5px}
.row-item .meta{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.list-foot{display:flex;justify-content:center;margin-top:26px}
/* ---------- Dark feature panel ---------- */
.dark-panel{
 position:relative;overflow:hidden;color:#fff;
 background:radial-gradient(120% 130% at 10% 0%,#17264f 0%,#0b1226 55%,#06090f 100%);
 border-radius:var(--r-xl);padding:46px;box-shadow:var(--sh-3);
}
.dark-panel::after{
 content:"";position:absolute;inset:0;pointer-events:none;
 background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
 linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
 background-size:56px 56px;
 -webkit-mask-image:radial-gradient(70% 70% at 80% 10%,#000,transparent 78%);
 mask-image:radial-gradient(70% 70% at 80% 10%,#000,transparent 78%);
}
.dark-panel > *{position:relative;z-index:2}
.dark-panel h2{font-size:clamp(20px,2.3vw,27px);color:#fff}
.dark-panel .dp-lede{color:#9fb0cf;font-size:14.6px;margin-top:12px;max-width:640px}
.dp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.dp-card{
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);
 border-radius:var(--r-md);padding:20px;transition:var(--ease);
}
.dp-card:hover{background:rgba(255,255,255,.1);transform:translateY(-4px);border-color:rgba(120,160,255,.45)}
.dp-card b{display:block;font-size:22px;color:#7fa6ff;letter-spacing:-.5px;margin-bottom:8px}
.dp-card h3{font-size:15.5px;color:#fff;margin-bottom:8px}
.dp-card p{font-size:13.8px;color:#9fb0cf;line-height:1.8}
.dp-bar{margin-top:30px;display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13.4px;color:#93a6c8}
.dp-bar li{display:flex;align-items:center;gap:8px}
.dp-bar li::before{content:"";width:7px;height:7px;border-radius:50%;background:#5fe3a1;flex-shrink:0}
/* ---------- Timeline ---------- */
.timeline{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}
.tl-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
 padding:18px 16px;box-shadow:var(--sh-1);transition:var(--ease);
}
.tl-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#c9d8f4}
.tl-item .day{font-size:14px;font-weight:800;color:var(--brand)}
.tl-item .dot{width:9px;height:9px;border-radius:50%;background:var(--brand);margin:10px 0 12px;box-shadow:0 0 0 5px rgba(29,78,216,.1)}
.tl-item p{font-size:13.2px;color:var(--muted);line-height:1.7}
/* ---------- Metrics ---------- */
.metrics{
 display:grid;grid-template-columns:repeat(4,1fr);
 background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
 overflow:hidden;box-shadow:var(--sh-2);
}
.metric{padding:28px 24px;border-right:1px solid var(--line);transition:var(--ease)}
.metric:last-child{border-right:0}
.metric:hover{background:var(--brand-soft)}
.metric b{display:block;font-size:29px;color:var(--brand);letter-spacing:-1.2px;line-height:1.15}
.metric span{display:block;color:var(--muted);font-size:13.4px;margin-top:6px}
/* ---------- Quotes ---------- */
.quote{
 background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
 padding:26px 24px;box-shadow:var(--sh-1);transition:var(--ease);height:100%;
 display:flex;flex-direction:column;
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.quote .mark{font-size:26px;color:#c3d4f0;line-height:1;margin-bottom:10px}
.quote p{color:var(--ink-2);font-size:14.6px;line-height:1.85;flex:1}
.quote footer{
 display:flex;align-items:center;gap:12px;margin-top:20px;
 padding-top:16px;border-top:1px dashed var(--line);
}
.avatar{
 width:38px;height:38px;border-radius:12px;flex-shrink:0;
 background:var(--brand-light);color:var(--brand);
 display:grid;place-items:center;font-weight:800;font-size:14px;
}
.quote footer b{display:block;font-size:14px}
.quote footer span{font-size:12.6px;color:var(--muted)}
/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:36px;align-items:start}
.faq-list{display:flex;flex-direction:column;gap:12px}
details.faq{
 background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
 box-shadow:var(--sh-1);overflow:hidden;transition:var(--ease);
}
details.faq[open]{border-color:#c9d8f4;box-shadow:var(--sh-2)}
details.faq summary{
 cursor:pointer;list-style:none;padding:18px 22px;
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 font-size:15.4px;font-weight:700;transition:var(--ease);
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary:hover{color:var(--brand)}
details.faq summary::after{content:"+";color:var(--brand);font-size:20px;font-weight:700;line-height:1}
details.faq[open] summary::after{content:"–"}
details.faq .ans{padding:0 22px 20px;color:var(--muted);font-size:14.4px;line-height:1.85}
/* ---------- CTA band ---------- */
.cta-band{
 background:linear-gradient(118deg,#1d4ed8 0%,#1b3ea6 58%,#122a63 100%);
 color:#fff;border-radius:var(--r-xl);padding:48px 46px;
 display:grid;grid-template-columns:1.5fr auto;gap:30px;align-items:center;
 box-shadow:var(--sh-3);position:relative;overflow:hidden;
}
.cta-band::after{
 content:"";position:absolute;width:420px;height:420px;border-radius:50%;
 background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%);
 right:-120px;top:-160px;pointer-events:none;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(21px,2.5vw,28px);color:#fff}
.cta-band p{color:#cfdcff;font-size:14.8px;margin-top:12px;max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
/* ---------- Footer ---------- */
.site-footer{background:var(--dark);color:#9fb0cf;padding:56px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand{
 display:flex;align-items:center;gap:10px;color:#fff;
 font-weight:800;font-size:17px;margin-bottom:14px;
}
.footer-col p{font-size:14px;line-height:1.85;color:#8fa1c0;max-width:340px}
.footer-col h4{color:#fff;font-size:14.5px;font-weight:700;margin-bottom:14px}
.footer-col ul li{margin-bottom:9px}
.footer-col a{font-size:14px;color:#9fb0cf;transition:var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{
 margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:13px;color:#7c8cab;
}
/* ---------- Responsive ---------- */
@media (max-width:1024px){
 .cat-hero-grid{grid-template-columns:1fr;gap:34px}
 .g-4{grid-template-columns:repeat(2,1fr)}
 .dp-grid{grid-template-columns:repeat(2,1fr)}
 .timeline{grid-template-columns:repeat(4,1fr)}
 .metrics{grid-template-columns:repeat(2,1fr)}
 .metric{border-bottom:1px solid var(--line)}
 .metric:nth-child(2n){border-right:0}
 .faq-wrap{grid-template-columns:1fr;gap:26px}
 .cta-band{grid-template-columns:1fr;padding:40px 32px}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
 .nav-links{
  position:absolute;top:70px;left:0;right:0;margin-left:0;
  flex-direction:column;align-items:stretch;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-3);padding:12px;display:none;z-index:90;
 }
 .nav-links.open{display:flex}
 .nav-links a{padding:11px 14px}
 .menu-btn{display:flex}
 .cmd-search{width:190px}
}
@media (max-width:768px){
 .section{padding:56px 0}
 .cat-hero{padding:44px 0 56px}
 .cmd-search{display:none}
 .g-2,.g-3{grid-template-columns:1fr}
 .row-item{grid-template-columns:44px 1fr;gap:14px}
 .row-item .meta{grid-column:2;justify-content:flex-start}
 .dl-grid,.dp-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:repeat(2,1fr)}
 .metrics{grid-template-columns:1fr}
 .metric{border-right:0}
 .dark-panel{padding:32px 24px}
 .cta-band{padding:34px 24px}
 .footer-grid{grid-template-columns:1fr;gap:26px}
 .footer-col p{max-width:100%}
}
@media (max-width:520px){
 .wrap{width:min(100% - 28px,var(--wrap))}
 .logo{font-size:17px}
 .logo-mark{width:30px;height:30px;font-size:14px}
 .hero-cta{flex-direction:column;align-items:stretch}
 .hero-cta .btn{width:100%}
 .stat-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:1fr}
 .cta-actions{flex-direction:column;align-items:stretch}
 .cta-actions .btn{width:100%}
 .row-item{padding:16px}
}

/* 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}