/* roulang page: index */
:root{
  --brand:#1C5C8A;
  --brand-deep:#123F5F;
  --brand-50:#E9F2F9;
  --brand-100:#D7E7F3;
  --aqua:#2C9C93;
  --sand:#C39A5F;
  --ink:#12293D;
  --ink-soft:#48607A;
  --ink-mute:#7E93A8;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3EAF2;
  --divider:#EDF2F7;
  --radius-card:14px;
  --radius-panel:20px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,63,95,.06);
  --shadow-md:0 10px 24px -12px rgba(18,63,95,.22);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,text-decoration-color .2s ease}
a:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--aqua);outline-offset:2px;border-radius:6px}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
}
@media (min-width:1024px){.header-inner{min-height:72px}}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--brand-deep),var(--brand) 65%,var(--aqua));
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:.02em;
  box-shadow:var(--shadow-sm);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-title{font-size:17px;font-weight:800;color:var(--brand-deep);letter-spacing:-.01em}
.brand-sub{font-size:11.5px;color:var(--ink-mute);letter-spacing:.04em}

.nav-desktop{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  min-height:40px;padding:0 14px;
  font-size:15px;color:var(--ink-soft);
  border-radius:var(--radius-btn);
  transition:all .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-50);text-decoration:none}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--brand);border-radius:2px;
}

.header-actions{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:all .2s ease;
  text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{color:var(--brand-deep);border-color:var(--brand-100);background:var(--brand-50);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);filter:brightness(.98)}
.btn-link{background:none;border:none;color:var(--brand);font-weight:600;padding:0;min-height:0}
.btn-link:hover{text-decoration:underline;text-underline-offset:4px}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}

.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;color:var(--brand-deep);
  cursor:pointer;transition:all .2s ease;
}
.menu-toggle:hover{background:var(--brand-50)}
@media (min-width:1024px){.menu-toggle{display:none}}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--divider);
  background:#fff;
  padding:14px 0 18px;
}
.mobile-drawer.is-open{display:block}
@media (min-width:1024px){.mobile-drawer.is-open{display:none}}
.mobile-drawer .nav-link{display:block;width:100%;padding:12px 16px;min-height:48px}
.mobile-drawer .nav-link.is-active::after{display:none}
.mobile-drawer .btn{width:100%;margin-top:10px}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#123F5F 0%,#1C5C8A 58%,#2C9C93 145%);
  color:#fff;
  padding:56px 0 76px;
}
@media (min-width:1024px){.hero{padding:80px 0 104px}}
.hero::before{
  content:"";
  position:absolute;
  left:-15%;right:-15%;bottom:-30%;
  height:70%;
  background:rgba(255,255,255,.06);
  transform:skewY(-7deg);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-1px;height:70px;
  background:var(--bg);
  clip-path:polygon(0 100%,100% 0,100% 100%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;gap:36px;
  grid-template-columns:1fr;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.08fr .92fr;gap:56px}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.24);
  font-size:12.5px;letter-spacing:.06em;
  color:#EAF4FB;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--aqua);box-shadow:0 0 0 3px rgba(44,156,147,.28)}
.hero h1{
  margin:20px 0 0;
  font-size:clamp(30px,4vw,44px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.01em;
  color:#fff;
}
.hero h1 .hl{color:#9FD8D2}
.hero-lead{
  margin:18px 0 0;
  max-width:68ch;
  font-size:16px;
  line-height:1.85;
  color:rgba(255,255,255,.86);
}
.hero-tags{
  margin:26px 0 0;padding:0;list-style:none;
  display:flex;flex-wrap:wrap;gap:10px;
}
.hero-tags li{
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  font-size:13px;color:#E7F2F9;
}
.hero-cta{margin-top:30px;display:flex;flex-wrap:wrap;gap:12px}
.hero-cta .btn-primary{background:#fff;color:var(--brand-deep)}
.hero-cta .btn-primary:hover{background:#EAF4FB;color:var(--brand-deep)}
.hero-cta .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.34)}
.hero-cta .btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff}
.hero-figure{
  position:relative;
  border-radius:var(--radius-panel);
  overflow:hidden;
  box-shadow:0 24px 48px -24px rgba(6,26,40,.7);
  border:1px solid rgba(255,255,255,.18);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;
  font-size:12.5px;color:#EAF4FB;
  background:linear-gradient(to top,rgba(8,28,44,.86),rgba(8,28,44,0));
}

/* ---------- Section base ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:80px 0}}
.section-alt{background:#fff}
.section-head{max-width:760px}
.section-head.center{margin:0 auto;text-align:center}
.section-eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;
  color:var(--aqua);text-transform:uppercase;
}
.section-title{
  margin:10px 0 0;
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.36;
  font-weight:700;
  color:var(--brand-deep);
  letter-spacing:-.01em;
}
.section-desc{
  margin:14px 0 0;
  font-size:15.5px;line-height:1.85;
  color:var(--ink-soft);
  max-width:70ch;
}

/* ---------- Cards ---------- */
.grid{display:grid;gap:20px}
@media (min-width:640px){.grid{gap:22px}}
@media (min-width:1024px){.grid{gap:24px}}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:1fr}
@media (min-width:640px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
  position:relative;
  overflow:hidden;
}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--brand-100)}
.card-top-bar{position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand)}
.card-top-bar.aqua{background:var(--aqua)}
.card-top-bar.sand{background:var(--sand)}
.card h3{margin:0 0 10px;font-size:18px;line-height:1.45;font-weight:600;color:var(--brand-deep)}
.card p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink-soft)}
.icon-badge{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand);
  margin-bottom:16px;
}
.icon-badge svg{width:22px;height:22px}
.pill{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);
  font-size:12px;line-height:1.5;font-weight:600;
  white-space:nowrap;
}
.pill-aqua{background:rgba(44,156,147,.1);color:#1F7A72;border:1px solid rgba(44,156,147,.28)}
.pill-outline{background:#fff;border:1px solid var(--line);color:var(--ink-soft)}

/* ---------- Download ---------- */
.download-band{
  background:linear-gradient(135deg,#123F5F,#1C5C8A 70%,#2C9C93 130%);
  color:#fff;
  border-radius:var(--radius-panel);
  padding:32px 24px;
  box-shadow:var(--shadow-md);
  position:relative;
  overflow:hidden;
}
@media (min-width:1024px){.download-band{padding:44px 40px}}
.download-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:rgba(255,255,255,.07);
}
.download-band h2{
  margin:0;font-size:clamp(20px,2.2vw,26px);line-height:1.4;font-weight:700;color:#fff;
}
.download-band p{margin:12px 0 0;font-size:15px;line-height:1.8;color:rgba(255,255,255,.84);max-width:62ch}
.download-grid{
  position:relative;z-index:2;
  margin-top:24px;
  display:grid;gap:14px;grid-template-columns:1fr;
}
@media (min-width:640px){.download-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.download-btn{
  display:flex;align-items:center;gap:12px;
  padding:16px 18px;
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.26);
  color:#fff;
  min-height:64px;
  transition:all .2s ease;
}
.download-btn:hover{background:rgba(255,255,255,.2);color:#fff;text-decoration:none;transform:translateY(-2px)}
.download-btn:active{transform:translateY(0);filter:brightness(.97)}
.download-btn .dl-name{font-size:15px;font-weight:700;display:block;line-height:1.4}
.download-btn .dl-file{font-size:12px;color:rgba(255,255,255,.72);display:block}
.download-note{margin:16px 0 0;font-size:12.5px;color:rgba(255,255,255,.68)}

/* ---------- Scenario rail ---------- */
.rail{
  display:flex;gap:16px;
  overflow-x:auto;
  padding:4px 4px 14px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:var(--brand-100);border-radius:999px}
.rail::-webkit-scrollbar-track{background:var(--divider);border-radius:999px}
.rail-card{
  flex:0 0 268px;
  scroll-snap-align:start;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
}
@media (min-width:1024px){.rail-card{flex:0 0 300px}}
.rail-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.rail-card h3{margin:0 0 8px;font-size:16.5px;font-weight:600;color:var(--brand-deep)}
.rail-card p{margin:0;font-size:14px;line-height:1.78;color:var(--ink-soft)}

/* ---------- Steps ---------- */
.steps{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:768px){.steps{grid-template-columns:repeat(3,minmax(0,1fr))}}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);position:relative;transition:all .2s ease;
}
.step:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;
  background:var(--brand);color:#fff;font-weight:700;font-size:15px;
  margin-bottom:14px;
}
.step h3{margin:0 0 8px;font-size:17px;font-weight:600;color:var(--brand-deep)}
.step p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink-soft)}

/* ---------- Split / preview ---------- */
.split{
  display:grid;gap:32px;align-items:center;grid-template-columns:1fr;
}
@media (min-width:1024px){.split{grid-template-columns:1.02fr .98fr;gap:52px}}
.split-figure{
  border-radius:var(--radius-panel);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-md);background:#fff;
}
.split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.checklist{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:12px}
.checklist li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;line-height:1.8;color:var(--ink-soft);
}
.checklist .tick{
  flex:0 0 22px;width:22px;height:22px;border-radius:6px;
  background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;margin-top:3px;
}

/* ---------- Category entry ---------- */
.cat-panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  padding:28px 24px;
  box-shadow:var(--shadow-sm);
  display:grid;gap:24px;grid-template-columns:1fr;
}
@media (min-width:1024px){.cat-panel{grid-template-columns:1fr 1.1fr;padding:40px;align-items:center}}
.cat-panel h2{margin:0;font-size:clamp(20px,2.2vw,26px);line-height:1.4;color:var(--brand-deep);font-weight:700}
.cat-panel p{margin:12px 0 0;font-size:15px;line-height:1.85;color:var(--ink-soft)}
.cat-link-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;border-radius:var(--radius-card);
  background:linear-gradient(135deg,var(--brand-50),#fff 85%);
  border:1px solid var(--brand-100);
  transition:all .2s ease;
}
.cat-link-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);text-decoration:none}
.cat-link-card .name{font-size:16.5px;font-weight:700;color:var(--brand-deep);display:block}
.cat-link-card .desc{font-size:13.5px;color:var(--ink-soft);display:block;margin-top:4px}
.cat-link-card .arrow{color:var(--brand);font-size:20px;font-weight:700;flex:0 0 auto}

/* ---------- Gallery ---------- */
.gal-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:all .2s ease;
}
.gal-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.gal-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.gal-card .gal-body{padding:18px 20px 20px}
.gal-card h3{margin:0 0 8px;font-size:16.5px;font-weight:600;color:var(--brand-deep)}
.gal-card p{margin:0;font-size:14px;line-height:1.78;color:var(--ink-soft)}

/* ---------- Price ---------- */
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);transition:all .2s ease;
  display:flex;flex-direction:column;
}
.price-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.price-card.featured{border-color:var(--brand-100);box-shadow:var(--shadow-md)}
.price-card .price-tag{margin:14px 0 0;font-size:22px;font-weight:800;color:var(--brand-deep);letter-spacing:.01em}
.price-card .price-note{font-size:12.5px;color:var(--ink-mute);margin-top:6px}
.price-card ul{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.price-card li{font-size:14.5px;line-height:1.75;color:var(--ink-soft);padding-left:16px;position:relative}
.price-card li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--aqua);
}

/* ---------- News ---------- */
.news-layout{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:1024px){.news-layout{grid-template-columns:1.55fr .95fr;gap:32px}}
.news-list{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:768px){.news-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-sm);transition:all .2s ease;
  display:flex;flex-direction:column;gap:10px;
}
.news-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--brand-100)}
.news-card .news-title{
  font-size:16.5px;font-weight:600;line-height:1.5;color:var(--brand-deep);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .news-title a:hover{text-decoration:none;color:var(--brand)}
.news-card .news-summary{
  font-size:14px;line-height:1.78;color:var(--ink-soft);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-mute);margin-top:auto}
.side-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-panel);padding:24px;box-shadow:var(--shadow-sm)}
.side-list h3{margin:0 0 16px;font-size:16px;font-weight:700;color:var(--brand-deep)}
.side-item{padding:14px 0;border-bottom:1px dashed var(--divider)}
.side-item:last-child{border-bottom:none;padding-bottom:0}
.side-item .side-title{font-size:14.5px;font-weight:600;line-height:1.55;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-item .side-title a:hover{text-decoration:none;color:var(--brand)}
.side-item .side-date{font-size:12px;color:var(--ink-mute);margin-top:6px;display:block}
.empty-state{
  background:var(--brand-50);
  border:1px dashed var(--brand-100);
  border-radius:var(--radius-card);
  padding:32px 24px;
  text-align:center;
  color:var(--ink-soft);
  font-size:14.5px;
  line-height:1.8;
}

/* ---------- Topic ---------- */
.topic-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);transition:all .2s ease;
  border-left:3px solid var(--aqua);
}
.topic-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.topic-card h3{margin:0 0 8px;font-size:16.5px;font-weight:600;color:var(--brand-deep)}
.topic-card p{margin:0;font-size:14px;line-height:1.78;color:var(--ink-soft)}

/* ---------- Notice ---------- */
.notice{
  background:#fff;
  border:1px solid var(--line);
  border-left:3px solid var(--sand);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-sm);
}
.notice h3{margin:0 0 10px;font-size:17px;font-weight:600;color:var(--brand-deep)}
.notice p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink-soft)}

/* ---------- CTA banner ---------- */
.cta-banner{
  background:linear-gradient(135deg,var(--brand-50),#FFFFFF 70%);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-panel);
  padding:36px 24px;
  text-align:center;
  box-shadow:var(--shadow-sm);
}
@media (min-width:1024px){.cta-banner{padding:56px 48px}}
.cta-banner h2{margin:0;font-size:clamp(21px,2.4vw,28px);line-height:1.4;font-weight:700;color:var(--brand-deep)}
.cta-banner p{margin:14px auto 0;max-width:64ch;font-size:15px;line-height:1.85;color:var(--ink-soft)}
.cta-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.78);padding:56px 0 0;margin-top:8px}
.footer-grid{display:grid;gap:34px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr .9fr .9fr 1.1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer-brand .brand-title{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.site-footer p{margin:0;font-size:14px;line-height:1.85;color:rgba(255,255,255,.7)}
.footer-col h4{margin:0 0 16px;font-size:14.5px;font-weight:700;color:#fff;letter-spacing:.02em}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.74);transition:color .2s ease}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:44px;
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.56);
}
.footer-bottom .dom{color:rgba(255,255,255,.72)}

/* ---------- Mobile bar ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:none;
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 18px -12px rgba(18,63,95,.3);
  padding:10px 12px;
  gap:10px;
}
.mobile-bar a{flex:1;min-height:44px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-btn);font-size:14px;font-weight:600}
.mobile-bar .bar-primary{background:var(--brand);color:#fff}
.mobile-bar .bar-primary:hover{background:var(--brand-deep);color:#fff;text-decoration:none}
.mobile-bar .bar-ghost{background:#fff;border:1px solid var(--line);color:var(--brand)}
.mobile-bar .bar-ghost:hover{background:var(--brand-50);text-decoration:none}
@media (max-width:767px){
  .mobile-bar{display:flex}
  body{padding-bottom:70px}
}

/* roulang page: article */
:root{
  --brand:#1C5C8A;
  --brand-deep:#123F5F;
  --brand-50:#E9F2F9;
  --brand-100:#D7E7F3;
  --aqua:#2C9C93;
  --sand:#C39A5F;
  --ink:#12293D;
  --ink-soft:#48607A;
  --ink-mute:#7E93A8;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3EAF2;
  --divider:#EDF2F7;
  --radius-card:14px;
  --radius-panel:20px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,63,95,.06);
  --shadow-md:0 10px 24px -12px rgba(18,63,95,.22);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,text-decoration-color .2s ease}
a:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px}}
/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
@media (min-width:1024px){.header-inner{min-height:72px}}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--brand-deep),var(--brand) 65%,var(--aqua));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:.02em;
  box-shadow:var(--shadow-sm);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-title{font-size:17px;font-weight:800;color:var(--brand-deep);letter-spacing:-.01em}
.brand-sub{font-size:11.5px;color:var(--ink-mute);letter-spacing:.04em}
.nav-desktop{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  min-height:40px;padding:0 14px;
  font-size:15px;color:var(--ink-soft);
  border-radius:var(--radius-btn);
  transition:all .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-50);text-decoration:none}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-link:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
.header-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;color:var(--brand-deep);
  cursor:pointer;transition:all .2s ease;
}
.menu-toggle:hover{background:var(--brand-50)}
.menu-toggle:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
@media (min-width:1024px){.menu-toggle{display:none}}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--divider);
  background:#fff;
  padding:14px 0 18px;
}
.mobile-drawer.is-open{display:block}
@media (min-width:1024px){.mobile-drawer.is-open{display:none}}
.mobile-drawer .nav-link{display:block;width:100%;padding:12px 16px;min-height:48px}
.mobile-drawer .nav-link.is-active::after{display:none}
.mobile-drawer .btn{width:100%;margin-top:10px}
/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:all .2s ease;
  text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{color:var(--brand-deep);border-color:var(--brand-100);background:var(--brand-50);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);filter:brightness(.98)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;line-height:1.5;font-weight:600;
  background:var(--brand-50);color:var(--brand);
  border:1px solid transparent;
}
.pill-aqua{background:#fff;color:var(--aqua);border-color:rgba(44,156,147,.42)}
.pill-sand{background:#FBF5EB;color:#8C6A32;border-color:rgba(195,154,95,.4)}
/* ---------- Page shell ---------- */
.page-shell{padding:26px 0 64px}
@media (min-width:1024px){.page-shell{padding:34px 0 84px}}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-mute);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--ink-mute)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C3D1DE}
.breadcrumb .current{color:var(--brand);font-weight:600}
.article-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:start;
}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:44px}
}
/* ---------- Article head ---------- */
.article-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  box-shadow:var(--shadow-sm);
  padding:24px 20px;
}
@media (min-width:768px){.article-card{padding:34px 36px 38px}}
.article-head .tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.article-head h1{
  font-size:clamp(25px,3.4vw,38px);
  line-height:1.32;
  font-weight:800;
  color:var(--brand-deep);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;
  margin-top:18px;padding-top:16px;
  border-top:1px solid var(--divider);
  font-size:13.5px;color:var(--ink-mute);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta strong{color:var(--ink-soft);font-weight:600}
.article-cover{
  margin:24px 0 0;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--brand-50);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-cover figcaption{
  padding:10px 14px;font-size:12.5px;color:var(--ink-mute);
  background:#fff;border-top:1px solid var(--divider);
}
/* ---------- Summary ---------- */
.summary-card{
  margin-top:26px;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-card);
  padding:20px 22px;
}
.summary-card h2{
  font-size:16px;font-weight:800;color:var(--brand-deep);
  display:flex;align-items:center;gap:8px;margin-bottom:12px;
}
.summary-card h2::before{
  content:"";width:4px;height:16px;border-radius:2px;background:var(--aqua);
}
.summary-card ul{list-style:none;display:grid;gap:9px}
.summary-card li{
  position:relative;padding-left:20px;
  font-size:14.5px;line-height:1.75;color:var(--ink-soft);
}
.summary-card li::before{
  content:"";position:absolute;left:2px;top:10px;
  width:6px;height:6px;border-radius:50%;
  background:var(--aqua);
}
/* ---------- Prose ---------- */
.prose-block{margin-top:30px}
.prose{max-width:72ch;font-size:16px;line-height:1.85;color:var(--ink-soft)}
.prose h2{
  font-size:23px;line-height:1.42;font-weight:700;color:var(--brand-deep);
  margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--divider);
  scroll-margin-top:96px;
}
.prose h3{
  font-size:18.5px;line-height:1.5;font-weight:600;color:var(--ink);
  margin:26px 0 10px;scroll-margin-top:96px;
}
.prose h4{font-size:16.5px;margin:20px 0 8px;color:var(--ink)}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:8px 0}
.prose blockquote{
  margin:20px 0;padding:8px 0 8px 16px;
  border-left:3px solid var(--aqua);
  background:var(--brand-50);
  border-radius:0 10px 10px 0;
  color:var(--ink-soft);font-size:15px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:12px;margin:20px 0}
.prose figure{margin:20px 0}
.prose figcaption{font-size:13px;color:var(--ink-mute);text-align:center;margin-top:8px}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:20px 0}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--brand-50);color:var(--brand-deep);font-weight:600}
.prose tbody tr:nth-child(even){background:#FAFCFE}
.prose a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.prose hr{border:none;border-top:1px solid var(--divider);margin:28px 0}
.prose:first-child{margin-top:0}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
/* ---------- Empty ---------- */
.empty-state{
  margin-top:26px;
  background:#fff;border:1px dashed var(--brand-100);
  border-radius:var(--radius-card);
  padding:34px 24px;text-align:center;
}
.empty-state h2{font-size:20px;margin-bottom:10px;color:var(--brand-deep)}
.empty-state p{font-size:14.5px;color:var(--ink-soft);margin-bottom:18px}
/* ---------- Checklist ---------- */
.block-section{margin-top:28px}
.block-head{margin-bottom:16px}
.block-head h2{font-size:21px;font-weight:700;color:var(--brand-deep)}
.block-head p{margin-top:8px;font-size:14.5px;color:var(--ink-soft);max-width:70ch}
.checklist{display:grid;gap:12px}
@media (min-width:768px){.checklist{grid-template-columns:1fr 1fr}}
.check-item{
  display:flex;gap:12px;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:16px 18px;
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
}
.check-item:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--brand-100)}
.check-icon{
  flex:0 0 24px;width:24px;height:24px;border-radius:8px;
  background:var(--brand-50);color:var(--aqua);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;margin-top:2px;
}
.check-item h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:4px}
.check-item p{font-size:13.8px;line-height:1.7;color:var(--ink-soft)}
/* ---------- Notice ---------- */
.notice-bar{
  margin-top:26px;
  display:flex;gap:14px;
  background:#FBF7EF;
  border:1px solid rgba(195,154,95,.36);
  border-radius:var(--radius-card);
  padding:18px 20px;
}
.notice-bar .bar{
  flex:0 0 4px;border-radius:3px;background:var(--sand);
}
.notice-bar h3{font-size:15px;font-weight:700;color:#8C6A32;margin-bottom:6px}
.notice-bar p{font-size:13.8px;line-height:1.75;color:#6B5A3E}
/* ---------- Download strip ---------- */
.download-strip{
  margin-top:30px;
  background:linear-gradient(140deg,#123F5F,#1C5C8A 62%,#25796F);
  border-radius:var(--radius-panel);
  padding:26px 22px;
  box-shadow:var(--shadow-md);
  color:#fff;
}
@media (min-width:768px){.download-strip{padding:32px 34px}}
.download-strip h2{color:#fff;font-size:21px;font-weight:800}
.download-strip p{margin-top:8px;font-size:14px;line-height:1.75;color:rgba(255,255,255,.84);max-width:74ch}
.download-grid{display:grid;gap:12px;margin-top:20px;grid-template-columns:1fr}
@media (min-width:640px){.download-grid{grid-template-columns:repeat(3,1fr)}}
.download-btn{
  display:flex;align-items:center;gap:12px;
  min-height:64px;padding:12px 16px;
  background:rgba(255,255,255,.96);
  border:1px solid rgba(255,255,255,.5);
  border-radius:var(--radius-btn);
  color:var(--brand-deep);
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
  text-decoration:none;
}
.download-btn:hover{background:#fff;color:var(--brand-deep);text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-md)}
.download-btn:active{transform:translateY(0)}
.download-btn:focus-visible{outline:2px solid #9FD8D2;outline-offset:3px}
.download-btn .ico{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:var(--brand-50);color:var(--brand-deep);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:800;
}
.download-btn .txt{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.download-btn .txt strong{font-size:14.5px;font-weight:700}
.download-btn .txt span{font-size:11.5px;color:var(--ink-mute);word-break:break-all}
/* ---------- CTA ---------- */
.cta-band{
  margin-top:30px;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-panel);
  padding:26px 24px;
  display:flex;flex-wrap:wrap;gap:18px;
  align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:20px;font-weight:800;color:var(--brand-deep)}
.cta-band p{margin-top:6px;font-size:14px;color:var(--ink-soft);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
/* ---------- Aside ---------- */
.aside-stack{display:grid;gap:18px}
@media (min-width:1024px){.aside-stack{position:sticky;top:96px}}
.aside-card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:18px 20px;
}
.aside-card h3{
  font-size:14px;font-weight:800;color:var(--brand-deep);
  letter-spacing:.02em;margin-bottom:12px;
  display:flex;align-items:center;gap:8px;
}
.aside-card h3::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--aqua)}
.toc-list{display:grid;gap:2px;max-height:340px;overflow-y:auto}
.toc-link{
  display:block;padding:7px 10px;border-radius:8px;
  font-size:13.5px;color:var(--ink-soft);
  border-left:2px solid transparent;
  transition:all .2s ease;
}
.toc-link:hover{background:var(--brand-50);color:var(--brand);text-decoration:none;border-left-color:var(--aqua)}
.toc-link.is-sub{padding-left:22px;font-size:13px;color:var(--ink-mute)}
.aside-card p.note{font-size:13.5px;line-height:1.75;color:var(--ink-soft)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud .pill{cursor:default;transition:all .2s ease}
.tag-cloud .pill:hover{background:var(--brand-100);color:var(--brand-deep)}
.aside-download .dl-row{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 0;border-bottom:1px dashed var(--divider);
  font-size:13.5px;
}
.aside-download .dl-row:last-child{border-bottom:none;padding-bottom:0}
.aside-download .dl-row a{font-weight:600}
.aside-download .dl-row span{color:var(--ink-mute);font-size:12px}
/* ---------- Footer ---------- */
.site-footer{
  background:var(--brand-deep);
  color:rgba(255,255,255,.78);
  padding:48px 0 22px;
  margin-top:20px;
}
.footer-grid{display:grid;gap:30px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-title{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.site-footer p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.72);max-width:36ch}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:12px;letter-spacing:.02em}
.footer-col ul{list-style:none;display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.74)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:34px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px;
  align-items:center;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.58);
}
.footer-bottom .dom{letter-spacing:.06em}
/* ---------- Mobile sticky bar ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;gap:10px;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 18px -12px rgba(18,63,95,.4);
}
.mobile-bar .btn{flex:1;min-height:42px;font-size:14px}
@media (min-width:1024px){.mobile-bar{display:none}}
@media (max-width:1023px){body{padding-bottom:70px}}

/* roulang page: category1 */
:root{
  --brand:#1C5C8A;
  --brand-deep:#123F5F;
  --brand-50:#E9F2F9;
  --brand-100:#D7E7F3;
  --aqua:#2C9C93;
  --sand:#C39A5F;
  --ink:#12293D;
  --ink-soft:#48607A;
  --ink-mute:#7E93A8;
  --bg:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3EAF2;
  --divider:#EDF2F7;
  --radius-card:14px;
  --radius-panel:20px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,63,95,.06);
  --shadow-md:0 10px 24px -12px rgba(18,63,95,.22);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,text-decoration-color .2s ease}
a:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--brand-deep);letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
}
@media (min-width:1024px){.header-inner{min-height:72px}}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--brand-deep),var(--brand) 65%,var(--aqua));
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:.02em;
  box-shadow:var(--shadow-sm);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-title{font-size:17px;font-weight:800;color:var(--brand-deep);letter-spacing:-.01em}
.brand-sub{font-size:11.5px;color:var(--ink-mute);letter-spacing:.04em}
.nav-desktop{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  min-height:40px;padding:0 14px;
  font-size:15px;color:var(--ink-soft);
  border-radius:var(--radius-btn);
  transition:all .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-50);text-decoration:none}
.nav-link:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:all .2s ease;
  text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{color:var(--brand-deep);border-color:var(--brand-100);background:var(--brand-50);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);filter:brightness(.98)}
.btn-link{background:none;border:none;color:var(--brand);font-weight:600;padding:0;min-height:0}
.btn-link:hover{text-decoration:underline;text-underline-offset:4px}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;color:var(--brand-deep);
  cursor:pointer;transition:all .2s ease;
}
.menu-toggle:hover{background:var(--brand-50)}
.menu-toggle:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}
@media (min-width:1024px){.menu-toggle{display:none}}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--divider);
  background:#fff;
  padding:14px 0 18px;
}
.mobile-drawer.is-open{display:block}
@media (min-width:1024px){.mobile-drawer.is-open{display:none}}
.mobile-drawer .nav-link{display:block;width:100%;padding:12px 16px;min-height:48px}
.mobile-drawer .nav-link.is-active::after{display:none}
.mobile-drawer .btn{width:100%;margin-top:10px}

/* ---------- Page head ---------- */
.page-head{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#123F5F 0%,#1C5C8A 62%,#2C9C93 155%);
  color:#fff;
  padding:36px 0 40px;
}
@media (min-width:1024px){.page-head{padding:48px 0 54px}}
.page-head::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-1px;height:44px;
  background:var(--bg);
  clip-path:polygon(0 100%,100% 0,100% 100%);
  pointer-events:none;
}
.page-head-grid{position:relative;z-index:2;display:grid;gap:26px;grid-template-columns:1fr}
@media (min-width:1024px){
  .page-head-grid{grid-template-columns:1.32fr .68fr;gap:44px;align-items:center}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.24);
  font-size:12.5px;letter-spacing:.06em;
  color:#EAF4FB;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--aqua);box-shadow:0 0 0 3px rgba(44,156,147,.28)}
.page-head h1{
  margin:16px 0 0;
  font-size:clamp(28px,3.6vw,40px);
  line-height:1.26;
  font-weight:800;
  color:#fff;
}
.page-head h1 .hl{color:#9FD8D2}
.page-head-lead{
  margin:16px 0 0;
  max-width:70ch;
  font-size:15.5px;
  line-height:1.85;
  color:rgba(255,255,255,.87);
}
.head-tags{margin:20px 0 0;display:flex;flex-wrap:wrap;gap:9px}
.head-tags li{
  padding:6px 13px;border-radius:999px;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  font-size:12.5px;color:#E7F2F9;
}
.info-panel{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius-panel);
  padding:20px 22px;
  backdrop-filter:blur(2px);
}
.info-panel h2{
  font-size:15px;font-weight:700;color:#fff;margin:0 0 12px;
  letter-spacing:.02em;
}
.info-list li{
  display:flex;align-items:flex-start;gap:10px;
  padding:7px 0;
  font-size:13.5px;line-height:1.7;
  color:rgba(255,255,255,.86);
  border-bottom:1px solid rgba(255,255,255,.12);
}
.info-list li:last-child{border-bottom:0;padding-bottom:0}
.info-list .dot{width:6px;height:6px;flex:0 0 6px;border-radius:50%;background:#9FD8D2;margin-top:8px}

/* ---------- Section base ---------- */
.section{padding:40px 0}
@media (min-width:1024px){.section{padding:64px 0}}
.section-bg{background:#fff;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.section-head{max-width:760px}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.1em;
  color:var(--aqua);text-transform:none;
}
.section-eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--aqua)}
.section-title{
  margin:10px 0 0;
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.35;
  font-weight:800;
}
.section-desc{margin:12px 0 0;color:var(--ink-soft);font-size:15.5px;line-height:1.85}

/* ---------- Index bar ---------- */
.index-bar{
  background:#fff;
  border-bottom:1px solid var(--divider);
  padding:14px 0;
  position:relative;
  z-index:3;
}
.index-bar-inner{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.index-bar-label{font-size:13px;color:var(--ink-mute);font-weight:600;letter-spacing:.04em}
.chip{
  display:inline-flex;align-items:center;
  min-height:34px;padding:0 14px;
  border-radius:999px;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  color:var(--brand);
  font-size:13.5px;font-weight:600;
  transition:all .2s ease;
}
.chip:hover{background:var(--brand);border-color:var(--brand);color:#fff;text-decoration:none}
.chip:focus-visible{outline:2px solid var(--aqua);outline-offset:2px}

/* ---------- Post list ---------- */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.list-grid{
  margin-top:26px;
  display:grid;
  gap:16px;
  grid-template-columns:1fr;
}
@media (min-width:768px){.list-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
@media (min-width:1024px){.list-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.post-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:20px 22px;
  transition:all .2s ease;
  height:100%;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.post-tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:600;
  background:var(--brand-50);
  color:var(--brand);
  border:1px solid var(--brand-100);
  align-self:flex-start;
}
.post-title{
  display:block;
  margin:12px 0 0;
  font-size:17px;font-weight:700;line-height:1.5;
  color:var(--brand-deep);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
a.post-title:hover{color:var(--brand);text-decoration:none}
.post-excerpt{
  margin:10px 0 0;
  font-size:14px;line-height:1.75;color:var(--ink-soft);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:14px;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-mute);
  border-top:1px solid var(--divider);
}
.empty-state{
  margin-top:24px;
  background:var(--brand-50);
  border:1px dashed var(--brand-100);
  border-radius:var(--radius-card);
  padding:34px 24px;
  text-align:center;
  color:var(--ink-soft);
  font-size:15px;
}

/* ---------- Split info ---------- */
.split{display:grid;gap:28px;grid-template-columns:1fr;align-items:center}
@media (min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:48px}}
.figure{
  border-radius:var(--radius-panel);
  overflow:hidden;
  box-shadow:var(--shadow-md);
  background:var(--brand-50);
  border:1px solid var(--line);
}
.figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.figure-cap{font-size:12.5px;color:var(--ink-mute);margin-top:10px;line-height:1.6}
.field-list{margin-top:18px;display:grid;gap:12px}
.field-item{
  display:flex;gap:12px;
  background:#fff;
  border:1px solid var(--line);
  border-left:3px solid var(--aqua);
  border-radius:10px;
  padding:12px 16px;
  box-shadow:var(--shadow-sm);
}
.field-item h3{font-size:14.5px;font-weight:700;color:var(--brand-deep);margin:0 0 2px}
.field-item p{font-size:13.5px;line-height:1.7;color:var(--ink-soft);margin:0}

/* ---------- Type grid ---------- */
.type-grid{margin-top:28px;display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:640px){.type-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
@media (min-width:1024px){.type-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.type-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
  display:flex;flex-direction:column;
}
.type-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.type-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50)}
.type-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.type-card:hover .type-thumb img{transform:scale(1.03)}
.type-body{padding:16px 18px 18px}
.type-body h3{font-size:16px;font-weight:700;margin:0 0 6px}
.type-body p{font-size:13.5px;line-height:1.72;color:var(--ink-soft);margin:0}

/* ---------- Checklist ---------- */
.check-grid{margin-top:26px;display:grid;gap:14px;grid-template-columns:1fr}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr);gap:18px}}
.check-item{
  display:flex;gap:14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:16px 18px;
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;
}
.check-item:hover{box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.check-mark{
  width:26px;height:26px;flex:0 0 26px;
  border-radius:8px;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;
}
.check-item h3{font-size:15px;font-weight:700;margin:0 0 4px}
.check-item p{font-size:13.5px;line-height:1.72;color:var(--ink-soft);margin:0}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:26px;max-width:880px}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:all .2s ease;
}
.faq-item + .faq-item{margin-top:12px}
.faq-item[open]{box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:15px 20px;
  min-height:56px;
  font-size:15.5px;font-weight:600;color:var(--brand-deep);
  transition:background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--brand-50)}
.faq-item summary:focus-visible{outline:2px solid var(--aqua);outline-offset:-2px}
.faq-item summary::after{
  content:"+";
  font-size:19px;line-height:1;font-weight:700;color:var(--aqua);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−"}
.faq-body{padding:0 20px 18px;font-size:14.5px;line-height:1.82;color:var(--ink-soft)}

/* ---------- Download strip ---------- */
.dl-section{
  background:linear-gradient(135deg,#123F5F,#1C5C8A 70%,#2C9C93 160%);
  color:#fff;
  padding:44px 0;
  position:relative;
  overflow:hidden;
}
@media (min-width:1024px){.dl-section{padding:64px 0}}
.dl-head{max-width:720px}
.dl-head h2{color:#fff;font-size:clamp(22px,2.6vw,28px);font-weight:800;line-height:1.35;margin:0}
.dl-head p{margin:12px 0 0;font-size:15px;line-height:1.85;color:rgba(255,255,255,.85)}
.dl-grid{margin-top:26px;display:grid;gap:14px;grid-template-columns:1fr}
@media (min-width:768px){.dl-grid{grid-template-columns:repeat(3,1fr);gap:18px}}
.dl-card{
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius-card);
  padding:18px 20px;
  display:flex;flex-direction:column;gap:10px;
  transition:all .2s ease;
}
.dl-card:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
.dl-card h3{color:#fff;font-size:15.5px;font-weight:700;margin:0}
.dl-card .file{font-size:12.5px;color:rgba(255,255,255,.7);letter-spacing:.03em}
.dl-card .btn{width:100%;margin-top:4px}
.dl-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:42px;padding:0 18px;
  background:#fff;color:var(--brand-deep);
  border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:700;
  transition:all .2s ease;
}
.dl-btn:hover{background:var(--brand-50);color:var(--brand-deep);text-decoration:none;transform:translateY(-1px)}
.dl-btn:active{transform:translateY(0);filter:brightness(.97)}
.dl-note{margin-top:18px;font-size:12.5px;color:rgba(255,255,255,.68);line-height:1.7}

/* ---------- Correction form ---------- */
.correct-wrap{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:1024px){.correct-wrap{grid-template-columns:.95fr 1.05fr;gap:40px;align-items:start}}
.correct-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  padding:22px;
  box-shadow:var(--shadow-sm);
}
.form-row{margin-bottom:14px}
.form-row label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-soft);margin-bottom:6px}
.form-row input,.form-row textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  padding:11px 14px;
  font-size:14.5px;
  font-family:inherit;
  color:var(--ink);
  transition:all .2s ease;
}
.form-row input:focus,.form-row textarea:focus{
  outline:none;
  border-color:var(--aqua);
  box-shadow:0 0 0 3px rgba(44,156,147,.16);
}
.form-row textarea{min-height:110px;resize:vertical;line-height:1.7}
.form-hint{font-size:12.5px;color:var(--ink-mute);margin-top:10px;line-height:1.7}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--brand-deep);
  color:rgba(255,255,255,.78);
  padding:44px 0 22px;
  margin-top:0;
}
.footer-grid{display:grid;gap:28px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.site-footer .brand-title{color:#fff}
.site-footer .brand-sub{color:rgba(255,255,255,.6)}
.site-footer p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.72);margin:0;max-width:42ch}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin:0 0 12px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:8px}
.footer-col a{color:rgba(255,255,255,.72);font-size:13.5px;transition:color .2s ease}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:32px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.6);
}
.footer-bottom .dom{letter-spacing:.04em}