/* roulang page: index */
:root{
  --primary:#FF4D18;
  --accent:#00E5FF;
  --gold:#FFB800;
  --bg:#0A0E17;
  --bg-card:#131A2A;
  --bg-hover:#1A2336;
  --text:#E6ECF5;
  --text-muted:#8A94A6;
  --border:rgba(255,255,255,0.1);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow:0 8px 24px rgba(0,0,0,0.35);
  --shadow-hover:0 12px 36px rgba(255,77,24,0.22);
  --gradient:linear-gradient(135deg,#FF4D18 0%,#FF2B6D 45%,#FFB800 100%);
  --font:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
  --mono:'DIN Alternate','Roboto Mono',Consolas,monospace;
  --header-h:72px;
  --spacer:90px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:color .25s}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--spacer) 0}
.section-label{display:inline-block;color:var(--accent);letter-spacing:.12em;font-size:14px;font-weight:600;margin-bottom:10px}
.section-title{font-size:36px;line-height:1.3;font-weight:800;margin-bottom:16px}
.section-sub{color:var(--text-muted);max-width:720px;margin-bottom:40px;font-size:16px}
.divider-glow{width:80px;height:3px;background:var(--gradient);border-radius:3px;margin-bottom:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:12px;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;transition:all .25s;white-space:nowrap}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 16px rgba(255,77,24,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,77,24,.4);filter:brightness(1.08)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.2);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:#fff}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);background:rgba(10,14,23,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-wrap{height:100%;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;letter-spacing:.02em}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--gradient);border-radius:9px;color:#fff;font-size:18px;box-shadow:0 0 14px rgba(255,77,24,.45)}
.brand-text{background:linear-gradient(135deg,#fff,#FFB800);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;gap:6px;flex:1}
.nav-link{padding:9px 16px;border-radius:9px;font-size:15px;font-weight:500;color:var(--text-muted);position:relative}
.nav-link::after{content:'';position:absolute;left:16px;right:16px;bottom:3px;height:2px;background:var(--gradient);border-radius:2px;opacity:0;transform:scaleX(.3);transition:opacity .25s,transform .25s}
.nav-link:hover{color:#fff}
.nav-link:hover::after{opacity:1;transform:scaleX(1)}
.nav-link.active{color:#fff;text-shadow:0 0 12px rgba(0,229,255,.4)}
.nav-link.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 10px rgba(0,229,255,.6)}
.nav-cta{margin-left:auto;padding:11px 24px;font-size:14px}
.nav-mobile-cta{display:none;margin-top:16px}
.nav-toggle{display:none}
.cat-hero{position:relative;padding:calc(var(--header-h) + 40px) 0 50px;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat}
.cat-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,14,23,.94),rgba(10,14,23,.5))}
.cat-hero .container{position:relative;z-index:2;display:flex;align-items:center;gap:40px}
.cat-hero-content{flex:1}
.cat-hero-title{font-size:44px;font-weight:900;margin-bottom:14px}
.cat-hero-sub{color:var(--text-muted);max-width:600px;margin-bottom:28px;font-size:16px;line-height:1.8}
.cat-hero-img{width:340px;flex:none;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.cat-hero-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.cat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cat-card{background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);transition:all .3s}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(255,77,24,.5);box-shadow:var(--shadow-hover)}
.cat-card-img{aspect-ratio:16/9;overflow:hidden}
.cat-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.cat-card:hover .cat-card-img img{transform:scale(1.04)}
.cat-card-body{padding:24px}
.cat-card h3{font-size:19px;font-weight:800;margin-bottom:10px}
.cat-card p{color:var(--text-muted);font-size:14px;line-height:1.7;margin-bottom:14px}
.cat-card-link{font-size:14px;font-weight:600;color:var(--accent)}
.stats{background:#0D1423;border-block:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.stat-card{background:var(--bg-card);border-radius:var(--radius-md);padding:36px 24px;text-align:center;border-top:2px solid var(--accent);box-shadow:var(--shadow)}
.stat-num{font-family:var(--mono);font-size:52px;font-weight:700;background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{color:var(--text-muted);margin-top:8px;font-size:14px}
.scenes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.scene-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:28px;border-top:2px solid var(--accent)}
.scene-icon{width:48px;height:48px;border-radius:12px;background:rgba(0,229,255,.1);display:grid;place-items:center;font-size:22px;margin-bottom:16px}
.scene-card h3{font-size:18px;font-weight:800;margin-bottom:10px}
.scene-card p{color:var(--text-muted);font-size:14px;line-height:1.7}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:28px;border:1px solid var(--border)}
.step-num{font-size:42px;font-weight:800;font-family:var(--mono);background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px;line-height:1}
.step-card h3{font-size:17px;font-weight:800;margin-bottom:8px}
.step-card p{font-size:14px;color:var(--text-muted);line-height:1.7}
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:20px 24px;background:transparent;border:none;color:var(--text);font-size:17px;font-weight:700;text-align:left;cursor:pointer;min-height:58px}
.faq-icon{width:28px;height:28px;flex:none;border-radius:8px;border:1px solid var(--border);display:grid;place-items:center;color:var(--accent);font-size:20px;transition:all .3s}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--accent)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 24px 20px;border-left:2px solid var(--accent);margin:0 24px 20px;padding-left:16px;color:var(--text-muted);line-height:1.8}
.cta-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:40px 48px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);flex-wrap:nowrap}
.cta-banner h2{font-size:26px;font-weight:800}
.cta-banner p{color:var(--text-muted);margin-top:6px}
.cta-actions{display:flex;gap:14px;flex:none}
.site-footer{border-top:1px solid var(--border);background:#0C101B;padding:56px 0 0}
.footer-glow{height:3px;background:var(--gradient);border:none}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{color:var(--text-muted);font-size:14px;max-width:320px;line-height:1.8}
.footer-col h4{font-size:15px;font-weight:800;margin-bottom:18px}
.footer-col a{display:block;color:var(--text-muted);font-size:14px;padding:6px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding:18px 0;display:flex;justify-content:space-between;gap:16px;color:var(--text-muted);font-size:13px;flex-wrap:wrap}
@media (max-width:992px){
  .cat-hero-img{display:none}
  .cat-cards,.scenes-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  :root{--spacer:56px;--header-h:60px}
  .cat-hero-title{font-size:30px}
  .cat-hero{padding-top:calc(var(--header-h) + 28px)}
  .section-title{font-size:28px}
  .nav-toggle{display:flex;flex-direction:column;gap:5px;width:44px;height:44px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border);border-radius:10px;cursor:pointer}
  .nav-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .main-nav{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(10,14,23,.98);flex-direction:column;padding:12px 24px 24px;gap:4px;display:none;border-bottom:1px solid var(--border)}
  .main-nav.open{display:flex}
  .nav-link{padding:14px 16px;font-size:16px;border-radius:10px}
  .nav-cta{display:none}
  .nav-mobile-cta{display:block}
  .nav-mobile-cta .btn{width:100%}
  .cta-banner{flex-direction:column;text-align:center;padding:28px 20px}
  .cta-actions{width:100%;justify-content:center;flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .stats-grid{grid-template-columns:1fr}
}
@media (max-width:576px){
  .cat-cards,.scenes-grid,.steps{grid-template-columns:1fr}
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --clr-primary: #FF4D18;
  --clr-primary-dark: #E03C0D;
  --clr-accent: #00E5FF;
  --clr-gold: #FFB800;
  --clr-neon-red: #FF5470;
  --clr-bg: #0A0E17;
  --clr-bg-alt: #0D1320;
  --clr-card: #131A2A;
  --clr-card-hover: #1A2336;
  --clr-border: rgba(255, 255, 255, 0.08);
  --clr-border-light: rgba(255, 255, 255, 0.14);
  --clr-text: #E6ECF5;
  --clr-text-secondary: #8A94A6;
  --clr-text-muted: #5C6678;
  --gradient-primary: linear-gradient(135deg, #FF4D18 0%, #FF5470 45%, #FFB800 100%);
  --gradient-border: linear-gradient(135deg, rgba(255,77,24,0.6), rgba(255,184,0,0.4));
  --gradient-text: linear-gradient(135deg, #FFB800, #FF4D18);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 36px rgba(255, 77, 24, 0.22);
  --shadow-glow: 0 0 20px rgba(255, 77, 24, 0.35);
  --shadow-accent: 0 0 24px rgba(0, 229, 255, 0.25);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --font-mono: "DIN Alternate", "Roboto Mono", Consolas, "Courier New", monospace;
  --container: 1200px;
  --header-h: 72px;
  --space-section: 84px;
  --space-section-mobile: 52px;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ========== Reset / Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  background-image: radial-gradient(ellipse at 20% 0%, rgba(255, 77, 24, 0.07) 0%, transparent 55%), radial-gradient(ellipse at 90% 10%, rgba(0, 229, 255, 0.04) 0%, transparent 45%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
ul, ol {
  list-style-position: inside;
}
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-article {
  max-width: 800px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
  min-height: 48px;
}
.btn:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 77, 24, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 77, 24, 0.45);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(255, 77, 24, 0.3);
}
.btn-outline {
  background: transparent;
  border-color: var(--clr-border-light);
  color: var(--clr-text);
}
.btn-outline:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  box-shadow: var(--shadow-accent);
  transform: translateY(-2px);
}
.btn-lg {
  padding: 16px 40px;
  font-size: 17px;
  min-height: 54px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  z-index: 999;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 20px;
  box-shadow: 0 4px 16px rgba(255, 77, 24, 0.4);
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--clr-text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 2px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover {
  color: var(--clr-text);
  text-shadow: 0 0 12px rgba(255, 77, 24, 0.5);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--clr-text);
  text-shadow: 0 0 12px rgba(255, 77, 24, 0.6);
}
.nav-link.active::after {
  transform: scaleX(1);
  box-shadow: 0 0 8px var(--clr-primary);
}
.nav-cta {
  margin-left: 12px;
  padding: 10px 22px;
  min-height: 40px;
  font-size: 14px;
}
.nav-mobile-cta {
  display: none;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--clr-border-light);
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-toggle:hover {
  border-color: var(--clr-primary);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== 面包屑 ========== */
.breadcrumb-wrap {
  padding-top: calc(var(--header-h) + 28px);
  padding-bottom: 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--clr-text-muted);
}
.breadcrumb a {
  color: var(--clr-text-secondary);
  transition: var(--transition);
}
.breadcrumb a:hover {
  color: var(--clr-accent);
}
.breadcrumb .separator {
  color: var(--clr-text-muted);
  opacity: 0.5;
}
.breadcrumb .current {
  color: var(--clr-text);
  font-weight: 500;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========== 文章头部 ========== */
.article-hero {
  position: relative;
  padding: 56px 0 48px;
  background: linear-gradient(to bottom, rgba(10, 14, 23, 0.75) 0%, var(--clr-bg) 100%), url('/assets/images/backpic/back-2.png') center 30% / cover no-repeat;
  border-bottom: 1px solid var(--clr-border);
}
.article-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.6;
}
.article-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}
.article-hero h1 {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 30%, #FFB8A0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  word-break: break-word;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--clr-text-secondary);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.meta-item i {
  color: var(--clr-accent);
  font-size: 14px;
}
.meta-item .meta-category {
  color: var(--clr-gold);
  font-family: var(--font-sans);
  font-weight: 600;
  padding: 2px 10px;
  border: 1px solid rgba(255, 184, 0, 0.3);
  border-radius: 100px;
  font-size: 12px;
}

/* ========== 正文区域 ========== */
.article-section {
  padding: 48px 0 32px;
}
.article-body {
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.85;
  color: var(--clr-text);
}
.article-body > * + * {
  margin-top: 20px;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.4;
  margin-top: 44px;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 4px solid var(--clr-primary);
  border-radius: 2px;
  color: var(--clr-text);
}
.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--clr-text);
}
.article-body p {
  color: var(--clr-text);
  opacity: 0.92;
}
.article-body a {
  color: var(--clr-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-body a:hover {
  color: var(--clr-primary);
  text-shadow: 0 0 12px rgba(255, 77, 24, 0.4);
}
.article-body ul, .article-body ol {
  padding-left: 8px;
  color: var(--clr-text);
  opacity: 0.92;
}
.article-body li {
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-body ul li::marker,
.article-body ol li::marker {
  color: var(--clr-primary);
  font-weight: 700;
}
.article-body blockquote {
  border-left: 4px solid var(--clr-accent);
  background: rgba(0, 229, 255, 0.06);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--clr-text-secondary);
  font-style: normal;
}
.article-body blockquote p {
  margin: 0;
  color: var(--clr-text-secondary);
}
.article-body img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin: 24px 0;
  width: 100%;
}
.article-body figure {
  margin: 24px 0;
}
.article-body figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--clr-text-muted);
  margin-top: 10px;
}
.article-body pre {
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: #C9D4E3;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
  color: var(--clr-accent);
}
.article-body pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
}
.article-body hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-border-light), transparent);
  margin: 36px 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--clr-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.article-body th, .article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--clr-border);
  text-align: left;
}
.article-body th {
  background: var(--clr-card-hover);
  font-weight: 700;
  color: var(--clr-text);
}

/* ========== 空状态 ========== */
.article-empty {
  text-align: center;
  padding: 80px 24px;
  background: var(--clr-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
}
.empty-icon {
  font-size: 52px;
  display: block;
  margin-bottom: 20px;
  opacity: 0.5;
}
.article-empty p {
  font-size: 18px;
  color: var(--clr-text-secondary);
  margin-bottom: 28px;
}

/* ========== 标签区 ========== */
.article-tags {
  padding: 20px 0 40px;
  border-bottom: 1px solid var(--clr-border);
}
.tags-wrap {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--clr-text-secondary);
  transition: var(--transition);
}
.tag:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  box-shadow: var(--shadow-accent);
}

/* ========== 相关推荐 ========== */
.related-section {
  padding: var(--space-section) 0;
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.3;
  position: relative;
  padding-left: 18px;
}
.section-header h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: var(--gradient-primary);
  border-radius: 4px;
  box-shadow: 0 0 12px rgba(255, 77, 24, 0.5);
}
.section-header .section-sub {
  font-size: 14px;
  color: var(--clr-text-secondary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 77, 24, 0.4);
  box-shadow: var(--shadow-hover);
}
.related-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--clr-card-hover);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .related-thumb img {
  transform: scale(1.05);
}
.related-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 14, 23, 0.4), transparent 60%);
}
.related-info {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.related-info h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--clr-text);
  transition: var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover .related-info h3 {
  color: var(--clr-primary);
}
.related-info p {
  font-size: 14px;
  color: var(--clr-text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clr-text-muted);
}
.related-meta i {
  color: var(--clr-accent);
}

/* ========== 返回链接 ========== */
.article-nav-links {
  padding: 0 0 40px;
}
.nav-links-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========== CTA ========== */
.article-cta {
  padding: 0 0 var(--space-section);
}
.cta-box {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(19, 26, 42, 0.95), rgba(10, 14, 23, 0.99)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border: 1px solid rgba(255, 77, 24, 0.25);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
}
.cta-box::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(255, 77, 24, 0.25), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 280px;
}
.cta-content h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-content p {
  color: var(--clr-text-secondary);
  font-size: 15px;
  line-height: 1.8;
}
.cta-box .btn {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

/* ========== 页脚 ========== */
.site-footer {
  position: relative;
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: 56px 0 0;
}
.footer-glow {
  position: absolute;
  left: 0;
  top: -1px;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.5;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--clr-text-secondary);
  line-height: 1.8;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--clr-text-secondary);
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--clr-accent);
  padding-left: 6px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid var(--clr-border);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--clr-text-muted);
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-box {
    padding: 36px 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }
  .brand-text {
    font-size: 18px;
  }
  .nav-wrap {
    gap: 12px;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: 100%;
    max-width: 360px;
    height: calc(100vh - var(--header-h));
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 32px 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.4s ease;
    overflow-y: auto;
    border-left: 1px solid var(--clr-border);
  }
  .main-nav.nav-open {
    transform: translateX(0);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
  }
  .nav-link {
    padding: 16px 18px;
    font-size: 17px;
    border-radius: 10px;
    width: 100%;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link.active {
    background: rgba(255, 77, 24, 0.1);
    border: 1px solid rgba(255, 77, 24, 0.2);
  }
  .nav-cta {
    display: none;
  }
  .nav-mobile-cta {
    display: block;
    margin-top: 16px;
  }
  .nav-mobile-cta .btn {
    width: 100%;
  }
  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 18px;
  }
  .breadcrumb-wrap {
    padding-top: calc(var(--header-h) + 24px);
  }
  .article-hero {
    padding: 40px 0 36px;
  }
  .article-hero h1 {
    font-size: 26px;
  }
  .article-meta {
    gap: 10px;
  }
  .meta-item {
    font-size: 12px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
  }
  .cta-box .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 22px;
  }
  .article-body h3 {
    font-size: 18px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #FF4D18;
            --primary-light: #FF6A3D;
            --accent: #00E5FF;
            --gold: #FFB800;
            --danger: #FF5470;
            --success: #0ACF83;
            --bg: #0A0E17;
            --bg-elev: #131A2A;
            --bg-hover: #1A2336;
            --text: #E6ECF5;
            --text-dim: #8A94A6;
            --border: rgba(255, 255, 255, 0.08);
            --radius-lg: 24px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 36px rgba(255, 77, 24, 0.22);
            --gradient: linear-gradient(135deg, #FF4D18 0%, #FF2D55 50%, #FFB800 100%);
            --ff-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
            --ff-num: "DIN Alternate", "Roboto Mono", "Consolas", monospace;
            --container: 1200px;
            --header-h: 72px;
            --space-sec: 96px;
            --transition: all .3s cubic-bezier(.4, 0, .2, 1);
        }
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--ff-body);
            font-size: 15px;
            line-height: 1.75;
            background: var(--bg);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img { max-width: 100%; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
        ul, ol { list-style: none; }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .visual-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0 0 0 0);
            white-space: nowrap;
        }
        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
            padding: 0 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(255, 77, 24, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(255, 77, 24, 0.45);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(255, 77, 24, 0.3);
        }
        .btn-outline {
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text);
            background: rgba(255, 255, 255, 0.03);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
        }
        .btn-outline:active {
            transform: scale(0.98);
        }
        .btn-lg {
            min-height: 54px;
            padding: 0 40px;
            font-size: 16px;
            border-radius: 14px;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        /* 标签 */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid rgba(0, 229, 255, 0.35);
            color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
            letter-spacing: 0.5px;
        }
        .tag-gold {
            border-color: rgba(255, 184, 0, 0.35);
            color: var(--gold);
            background: rgba(255, 184, 0, 0.06);
        }
        /* 板块标题 */
        .section-eyebrow {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 3px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .section-eyebrow::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(28px, 4vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            color: var(--text);
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-dim);
            max-width: 680px;
            line-height: 1.8;
        }
        .section-header {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 56px;
        }
        .section {
            padding: var(--space-sec) 0;
            position: relative;
        }
        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            font-size: 26px;
            line-height: 1;
            filter: drop-shadow(0 0 10px rgba(255, 77, 24, 0.6));
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            position: relative;
            padding: 10px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dim);
            border-radius: 8px;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 0;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(0.4);
            transition: var(--transition);
            filter: drop-shadow(0 0 6px rgba(255, 77, 24, 0.8));
        }
        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link:hover::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--text);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
        }
        .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-mobile-cta {
            display: none;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: transparent;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--accent);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            padding: calc(var(--header-h) + 96px) 0 88px;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 75% 40%, rgba(255, 77, 24, 0.2), transparent 55%),
                linear-gradient(115deg, rgba(10, 14, 23, 0.97) 20%, rgba(10, 14, 23, 0.82) 50%, rgba(10, 14, 23, 0.5) 100%);
        }
        .category-hero::after {
            content: '';
            position: absolute;
            right: -120px;
            top: 50%;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            border: 1px solid rgba(255, 77, 24, 0.2);
            box-shadow: 0 0 80px rgba(255, 77, 24, 0.1), inset 0 0 60px rgba(0, 229, 255, 0.04);
            transform: translateY(-50%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-dim);
            margin-bottom: 28px;
        }
        .category-breadcrumb a {
            color: var(--text-dim);
        }
        .category-breadcrumb a:hover {
            color: var(--accent);
        }
        .category-breadcrumb .sep {
            opacity: 0.5;
        }
        .category-breadcrumb .current {
            color: var(--text);
        }
        .category-hero h1 {
            font-size: clamp(36px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 24px;
            max-width: 680px;
            letter-spacing: -1px;
        }
        .category-hero h1 .highlight {
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .category-hero .hero-lead {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-dim);
            max-width: 600px;
            margin-bottom: 36px;
        }
        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .hero-stat-row {
            display: flex;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            max-width: 600px;
        }
        .hero-stat {
            flex: 1;
        }
        .hero-stat .num {
            font-family: var(--ff-num);
            font-size: 30px;
            font-weight: 800;
            color: var(--gold);
            display: block;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: var(--text-dim);
            margin-top: 4px;
        }
        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-elev);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient);
            opacity: 0;
            transition: opacity .3s;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 77, 24, 0.3);
            box-shadow: var(--shadow-hover);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-light);
            background: rgba(255, 77, 24, 0.1);
            border: 1px solid rgba(255, 77, 24, 0.2);
            margin-bottom: 24px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(255, 77, 24, 0.18);
            box-shadow: 0 0 20px rgba(255, 77, 24, 0.25);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-dim);
            line-height: 1.8;
        }
        /* ===== Solutions Split ===== */
        .solution-section {
            background: #0C111D;
        }
        .solution-layout {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 48px;
            align-items: start;
        }
        .solution-nav {
            position: sticky;
            top: calc(var(--header-h) + 32px);
            background: var(--bg-elev);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 16px;
            box-shadow: var(--shadow-card);
        }
        .solution-nav .nav-title {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-dim);
            padding: 12px 16px 8px;
            letter-spacing: 2px;
        }
        .solution-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dim);
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .solution-nav a i {
            width: 18px;
            text-align: center;
            color: var(--text-dim);
            transition: var(--transition);
        }
        .solution-nav a:hover {
            color: var(--text);
            background: var(--bg-hover);
        }
        .solution-nav a.active {
            color: var(--text);
            background: var(--bg-hover);
            border-left-color: var(--accent);
            box-shadow: inset 0 0 20px rgba(0, 229, 255, 0.06);
        }
        .solution-nav a.active i {
            color: var(--accent);
        }
        .solution-content {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .solution-card {
            background: var(--bg-elev);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-bottom: 24px;
            transition: var(--transition);
            scroll-margin-top: 120px;
        }
        .solution-card:hover {
            border-color: rgba(0, 229, 255, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }
        .solution-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .solution-card h3 i {
            color: var(--primary-light);
            font-size: 20px;
        }
        .solution-card p {
            color: var(--text-dim);
            line-height: 1.85;
            margin-bottom: 12px;
            font-size: 15px;
        }
        .solution-card ul {
            margin-top: 16px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .solution-card ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-dim);
            line-height: 1.7;
        }
        .solution-card ul li i {
            color: var(--success);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }
        /* ===== Stats Band ===== */
        .stats-band-wrap {
            padding: 24px 0;
        }
        .stats-band {
            background: linear-gradient(135deg, rgba(255, 77, 24, 0.08), rgba(0, 229, 255, 0.04));
            border: 1px solid rgba(255, 77, 24, 0.15);
            border-radius: 28px;
            padding: 48px 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            overflow: hidden;
        }
        .stats-band::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient);
            opacity: 0.6;
        }
        .stat-item {
            text-align: center;
        }
        .stat-item .stat-num {
            font-family: var(--ff-num);
            font-size: clamp(40px, 5vw, 56px);
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-dim);
            margin-top: 10px;
        }
        .stat-item .stat-divider {
            width: 40px;
            height: 2px;
            background: rgba(255, 184, 0, 0.5);
            margin: 16px auto 0;
            border-radius: 2px;
        }
        /* ===== Scenarios ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scenario-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-elev);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
        }
        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 184, 0, 0.25);
        }
        .scenario-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .scenario-body {
            padding: 28px;
        }
        .scenario-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .scenario-body p {
            font-size: 14px;
            color: var(--text-dim);
            line-height: 1.75;
        }
        .scenario-link {
            margin-top: 16px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--gold);
        }
        .scenario-link:hover {
            gap: 10px;
        }
        /* ===== Process ===== */
        .process-section {
            background: #0C111D;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 6%;
            right: 6%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--gold));
            opacity: 0.35;
            border-radius: 2px;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding-top: calc(40px + 16px);
        }
        .process-step .step-circle {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-elev);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--ff-num);
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-light);
            box-shadow: 0 0 0 6px rgba(255, 77, 24, 0.08);
            transition: var(--transition);
            z-index: 2;
        }
        .process-step:hover .step-circle {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.1), 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .process-step h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-dim);
            line-height: 1.7;
            padding: 0 8px;
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
        }
        .faq-item {
            background: var(--bg-elev);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.06);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: transparent;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .faq-icon {
            position: relative;
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }
        .faq-question .faq-icon::before,
        .faq-question .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--text-dim);
            border-radius: 2px;
            transition: var(--transition);
        }
        .faq-question .faq-icon::before {
            top: 8px;
            left: 0;
            width: 18px;
            height: 2px;
        }
        .faq-question .faq-icon::after {
            top: 0;
            left: 8px;
            width: 2px;
            height: 18px;
        }
        .faq-item.active .faq-icon::before {
            background: var(--accent);
        }
        .faq-item.active .faq-icon::after {
            background: var(--accent);
            transform: rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s cubic-bezier(.4, 0, .2, 1);
        }
        .faq-answer-inner {
            padding: 0 24px 24px 24px;
            border-left: 2px solid var(--accent);
            margin-left: 24px;
            padding-left: 18px;
            color: var(--text-dim);
            font-size: 14px;
            line-height: 1.85;
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: -2px;
            border-radius: var(--radius-md);
        }
        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, rgba(255, 77, 24, 0.15), rgba(255, 184, 0, 0.06));
            border: 1px solid rgba(255, 77, 24, 0.25);
            border-radius: 32px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -70px;
            right: -70px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(closest-side, rgba(255, 77, 24, 0.35), transparent);
        }
        .cta-box h2 {
            font-size: clamp(26px, 3.5vw, 38px);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--text-dim);
            font-size: 16px;
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .cta-note {
            margin-top: 24px;
            font-size: 13px;
            color: var(--text-dim);
        }
        /* ===== Footer ===== */
        .site-footer {
            position: relative;
            background: #070B12;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 80px;
        }
        .footer-glow {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient);
            opacity: 0.6;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-dim);
            line-height: 1.75;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text);
            letter-spacing: 2px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-dim);
            padding: 6px 0;
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 28px 0;
            font-size: 13px;
            color: rgba(138, 148, 166, 0.7);
        }
        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            :root { --space-sec: 72px; }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 40px 20px;
            }
            .process-grid::before {
                display: none;
            }
            .process-step {
                padding-top: 0;
            }
            .process-step .step-circle {
                position: static;
                transform: none;
                margin: 0 auto 20px;
            }
            .solution-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .solution-nav {
                position: static;
                display: flex;
                flex-wrap: wrap;
                gap: 8px;
                padding: 12px;
            }
            .solution-nav .nav-title {
                width: 100%;
                padding: 8px 8px 4px;
            }
            .solution-nav a {
                padding: 10px 14px;
                font-size: 14px;
                border-left: none;
                border-radius: 8px;
            }
            .solution-nav a.active {
                border-left: none;
                background: rgba(0, 229, 255, 0.1);
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }
        }
        @media (max-width: 768px) {
            :root { --space-sec: 56px; }
            .site-header {
                height: 60px;
            }
            .nav-wrap {
                padding: 0 16px;
            }
            .brand-text {
                font-size: 17px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(8, 11, 18, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 28px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                padding: 14px 12px;
                font-size: 16px;
                border-radius: 8px;
                border-left: 3px solid transparent;
            }
            .nav-link::after {
                display: none;
            }
            .nav-link.active {
                border-left-color: var(--accent);
                background: rgba(0, 229, 255, 0.06);
            }
            .nav-cta {
                display: none;
            }
            .nav-mobile-cta {
                display: block;
                margin-top: 12px;
            }
            .nav-mobile-cta .btn {
                width: 100%;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding-top: calc(60px + 56px);
                padding-bottom: 56px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .hero-lead {
                font-size: 15px;
            }
            .hero-stat-row {
                gap: 20px;
                flex-wrap: wrap;
            }
            .hero-stat {
                flex: 1 1 40%;
            }
            .features-grid,
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .solution-card {
                padding: 24px;
            }
            .solution-card ul {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 48px 24px;
                border-radius: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .stats-band {
                padding: 32px 20px;
            }
            .stat-item .stat-num {
                font-size: 40px;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
            .features-grid {
                gap: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .process-step {
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
                background: var(--bg-elev);
                border: 1px solid var(--border);
                border-radius: var(--radius-md);
                padding: 16px;
            }
            .process-step .step-circle {
                margin: 0;
                position: static;
                flex-shrink: 0;
                width: 48px;
                height: 48px;
                font-size: 16px;
            }
            .process-step p {
                padding: 0;
            }
            .stats-band {
                grid-template-columns: 1fr 1fr;
            }
            .category-hero .hero-actions .btn {
                width: 100%;
            }
            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }
        @media (max-width: 400px) {
            .stats-band {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
  --bg-deep: #0A0E17;
  --bg-card: #131A2A;
  --bg-hover: #1A2336;
  --primary: #FF4D18;
  --primary-light: #FF7A3D;
  --accent: #00E5FF;
  --gold: #FFB800;
  --text-main: #E6ECF5;
  --text-sub: #8A94A6;
  --border: rgba(255, 255, 255, 0.08);
  --danger: #FF5470;
  --success: #2EE6A8;
  --radius-lg: 24px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 36px rgba(255, 77, 24, 0.22);
  --glow: 0 0 20px rgba(0, 229, 255, 0.25);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --font-mono: "DIN Alternate", "Roboto Mono", Consolas, monospace;
  --container: 1200px;
  --pad: 24px;
  --header-h: 72px;
  --page-accent: var(--gold);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--bg-deep); color: var(--text-main); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- Header / Nav ---------- */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background: rgba(10, 14, 23, 0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); height: var(--header-h); display: flex; align-items: center; }
.nav-wrap { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark { font-size: 26px; line-height: 1; filter: drop-shadow(0 0 8px rgba(255, 77, 24, 0.6)); }
.brand-text { font-size: 22px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--gold)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: 1px; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { position: relative; padding: 8px 14px; font-size: 15px; font-weight: 500; color: var(--text-sub); border-radius: 8px; transition: color 0.25s, text-shadow 0.25s; }
.nav-link::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 0; height: 2px; background: linear-gradient(90deg, var(--primary), var(--gold)); border-radius: 2px; transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
.nav-link:hover { color: var(--text-main); text-shadow: 0 0 12px rgba(255, 77, 24, 0.25); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--text-main); font-weight: 700; text-shadow: 0 0 14px rgba(255, 77, 24, 0.45), 0 0 28px rgba(255, 184, 0, 0.2); }
.nav-link.active::after { transform: scaleX(1); box-shadow: 0 0 12px rgba(255, 77, 24, 0.8); }
.nav-mobile-cta { display: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 10px; width: 44px; height: 40px; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px; transition: border-color 0.25s; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text-main); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav-toggle:hover { border-color: rgba(255, 77, 24, 0.5); }
.nav-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: none; cursor: pointer; padding: 12px 26px; border-radius: 12px; font-size: 15px; font-weight: 700; transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s, opacity 0.25s; }
.btn-primary { background: linear-gradient(135deg, var(--primary) 0%, #FF7A3D 50%, var(--gold) 100%); color: #fff; box-shadow: 0 6px 18px rgba(255, 77, 24, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255, 77, 24, 0.45); filter: brightness(1.08); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 10px rgba(255, 77, 24, 0.3); }
.btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-ghost { background: transparent; border: 1px solid rgba(255, 255, 255, 0.25); color: var(--text-main); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 16px rgba(0, 229, 255, 0.15); transform: translateY(-2px); }
.btn-ghost:active { transform: translateY(0); }
.btn-ghost:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- Hero ---------- */
.page-hero { position: relative; padding: 160px 0 90px; background: url("/assets/images/backpic/back-2.png") center/cover no-repeat; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(10, 14, 23, 0.92) 15%, rgba(10, 14, 23, 0.62) 60%, rgba(255, 77, 24, 0.15) 100%); }
.page-hero::after { content: ""; position: absolute; right: -80px; top: 40%; width: 280px; height: 280px; background: radial-gradient(circle, rgba(255, 77, 24, 0.22), transparent 65%); filter: blur(40px); pointer-events: none; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 420px; gap: 48px; align-items: center; }
.hero-left .eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border: 1px solid rgba(255, 184, 0, 0.4); border-radius: 999px; font-size: 13px; color: var(--gold); letter-spacing: 1px; margin-bottom: 22px; }
.hero-left h1 { font-size: 52px; font-weight: 900; line-height: 1.25; letter-spacing: 2px; margin-bottom: 18px; }
.hero-left h1 .brand-highlight { background: linear-gradient(135deg, var(--primary), var(--gold)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 17px; color: var(--text-sub); max-width: 600px; line-height: 1.8; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-cover { position: relative; z-index: 2; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid rgba(255, 255, 255, 0.1); transform: perspective(900px) rotateY(-4deg) rotateX(2deg); transition: transform 0.4s ease; }
.hero-cover:hover { transform: perspective(900px) rotateY(0deg) rotateX(0deg); }
.hero-cover img { width: 100%; height: 290px; object-fit: cover; }
.hero-cover .cover-tag { position: absolute; left: 14px; bottom: 14px; background: rgba(10, 14, 23, 0.8); border: 1px solid rgba(255, 77, 24, 0.4); padding: 6px 14px; border-radius: 999px; font-size: 13px; color: var(--text-main); }

/* ---------- Section Common ---------- */
.section { padding: 90px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .section-tag { display: inline-block; font-size: 13px; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 10px; font-family: var(--font-mono); }
.section-head h2 { font-size: 34px; font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.section-head h2 .highlight { background: linear-gradient(135deg, var(--primary), var(--gold)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.section-head p { color: var(--text-sub); font-size: 16px; line-height: 1.8; }

/* ---------- Capabilities Cards ---------- */
.capabilities { background: linear-gradient(180deg, var(--bg-deep), var(--bg-card)); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cap-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s; }
.cap-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(255, 77, 24, 0.35); }
.cap-card .card-img { position: relative; overflow: hidden; aspect-ratio: 16 / 9; background: var(--bg-hover); }
.cap-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.cap-card:hover .card-img img { transform: scale(1.04); }
.cap-card .card-body { padding: 26px; }
.cap-card .card-num { font-family: var(--font-mono); font-size: 14px; color: var(--gold); letter-spacing: 1px; margin-bottom: 8px; }
.cap-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.cap-card p { color: var(--text-sub); font-size: 15px; line-height: 1.7; margin-bottom: 18px; }
.card-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary-light); transition: gap 0.25s, color 0.25s; }
.card-link:hover { gap: 12px; color: var(--primary); }

/* ---------- Scenarios ---------- */
.scenarios { background: var(--bg-deep); }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px 28px; position: relative; overflow: hidden; transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s; }
.scenario-card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: linear-gradient(90deg, var(--primary), var(--gold)); opacity: 0; transition: opacity 0.3s; }
.scenario-card:hover { border-color: rgba(255, 184, 0, 0.3); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.scenario-card:hover::before { opacity: 1; }
.scenario-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; background: rgba(255, 77, 24, 0.12); border: 1px solid rgba(255, 77, 24, 0.25); margin-bottom: 20px; }
.scenario-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.scenario-card p { color: var(--text-sub); font-size: 15px; line-height: 1.75; }

/* ---------- Metrics ---------- */
.metrics { position: relative; background: linear-gradient(135deg, #0C111C 0%, #101A2C 100%); padding: 90px 0; overflow: hidden; }
.metrics::before { content: ""; position: absolute; left: 50%; top: 50%; width: 700px; height: 400px; transform: translate(-50%, -50%); background: radial-gradient(ellipse, rgba(255, 77, 24, 0.12), transparent 70%); pointer-events: none; }
.metrics-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.metric-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 40px 24px; text-align: center; box-shadow: var(--shadow-card); position: relative; overflow: hidden; }
.metric-card::after { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: linear-gradient(90deg, var(--primary), var(--gold), var(--accent)); opacity: 0.8; }
.metric-num { font-family: var(--font-mono); font-size: 52px; font-weight: 700; line-height: 1.2; background: linear-gradient(135deg, var(--primary), var(--gold)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 10px; }
.metric-num .unit { font-size: 20px; margin-left: 2px; }
.metric-label { color: var(--text-sub); font-size: 14px; letter-spacing: 1px; }

/* ---------- Process ---------- */
.process { background: var(--bg-deep); }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-steps::before { content: ""; position: absolute; top: 30px; left: 60px; right: 60px; height: 2px; background: linear-gradient(90deg, var(--primary), var(--gold)); opacity: 0.3; border-radius: 2px; }
.step-card { position: relative; text-align: center; padding: 0 10px; }
.step-dot { position: relative; z-index: 1; width: 60px; height: 60px; margin: 0 auto 20px; background: var(--bg-card); border: 2px solid var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 20px; font-weight: 700; color: var(--primary); box-shadow: 0 0 0 6px rgba(255, 77, 24, 0.1); }
.step-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.step-card p { color: var(--text-sub); font-size: 14px; line-height: 1.7; max-width: 220px; margin: 0 auto; }

/* ---------- FAQ ---------- */
.faq { background: linear-gradient(180deg, var(--bg-deep), var(--bg-card)); }
.faq-wrap { max-width: 840px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 14px; overflow: hidden; transition: border-color 0.3s, box-shadow 0.3s; }
.faq-item.active { border-color: rgba(255, 77, 24, 0.4); box-shadow: 0 0 20px rgba(255, 77, 24, 0.08); }
.faq-question { width: 100%; padding: 18px 22px; display: flex; align-items: center; justify-content: space-between; gap: 16px; background: transparent; border: none; cursor: pointer; font-size: 16px; font-weight: 600; text-align: left; color: var(--text-main); transition: color 0.25s; min-height: 48px; }
.faq-question:hover { color: var(--primary-light); }
.faq-question:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-md); }
.faq-icon { position: relative; width: 18px; height: 18px; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--primary); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.faq-icon::before { width: 18px; height: 2px; top: 8px; left: 0; }
.faq-icon::after { width: 2px; height: 18px; top: 0; left: 8px; }
.faq-item.active .faq-icon::after { transform: rotate(90deg); opacity: 0; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; border-left: 2px solid var(--accent); margin-left: 22px; background: rgba(0, 229, 255, 0.03); }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer p { padding: 14px 22px 18px; color: var(--text-sub); font-size: 15px; line-height: 1.8; }

/* ---------- CTA / Contact ---------- */
.cta-section { background: var(--bg-deep); }
.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow-card); }
.cta-left h2 { font-size: 30px; font-weight: 800; line-height: 1.4; margin-bottom: 18px; }
.cta-left h2 span { color: var(--primary); }
.cta-left p { color: var(--text-sub); line-height: 1.8; margin-bottom: 28px; }
.contact-list { display: flex; flex-direction: column; gap: 14px; }
.contact-item { display: flex; align-items: center; gap: 12px; color: var(--text-main); font-size: 15px; }
.contact-item i { font-style: normal; color: var(--gold); }
.cta-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-sub); font-weight: 600; }
.form-group input, .form-group select, .form-group textarea { background: var(--bg-deep); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 10px; padding: 13px 16px; color: var(--text-main); transition: border-color 0.25s, box-shadow 0.25s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.18); }
.form-group textarea { resize: vertical; min-height: 90px; }
.form-success { display: none; background: rgba(46, 230, 168, 0.08); border: 1px solid rgba(46, 230, 168, 0.4); border-radius: 10px; padding: 12px 16px; font-size: 14px; color: var(--success); }
.cta-form .btn { align-self: flex-start; min-width: 160px; height: 48px; }

/* ---------- Footer ---------- */
.site-footer { position: relative; background: #070A12; border-top: 1px solid var(--border); padding-top: 60px; }
.footer-glow { position: absolute; top: -1px; left: 0; width: 100%; height: 1px; background: linear-gradient(90deg, transparent, var(--primary), var(--gold), var(--accent), transparent); opacity: 0.7; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 42px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { color: var(--text-sub); font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-col h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 18px; }
.footer-col a { display: block; color: var(--text-sub); font-size: 14px; padding: 6px 0; transition: color 0.25s, padding-left 0.25s; }
.footer-col a:hover { color: var(--primary-light); padding-left: 8px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--text-sub); font-size: 14px; flex-wrap: wrap; }
.footer-bottom span { font-family: var(--font-mono); }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-cover { transform: none; max-width: 560px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
  .process-steps::before { display: none; }
  .cta-grid { grid-template-columns: 1fr; padding: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --header-h: 60px; --pad: 16px; }
  .nav-toggle { display: flex; }
  .main-nav { position: fixed; top: var(--header-h); right: 0; width: 76%; max-width: 320px; height: calc(100vh - var(--header-h)); background: rgba(10, 14, 23, 0.98); flex-direction: column; align-items: stretch; padding: 24px 20px; gap: 10px; transform: translateX(100%); transition: transform 0.35s ease; border-left: 1px solid var(--border); box-shadow: -20px 0 40px rgba(0, 0, 0, 0.4); }
  .main-nav.open { transform: translateX(0); }
  .nav-link { padding: 14px 16px; font-size: 16px; }
  .nav-link::after { left: 16px; right: 16px; }
  .nav-cta { display: none !important; }
  .nav-mobile-cta { display: block; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 16px; }
  .page-hero { padding: 120px 0 60px; }
  .page-hero h1 { font-size: 34px; }
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 26px; }
  .card-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 576px) {
  .hero-actions .btn { width: 100%; }
  .metrics-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .cta-grid { padding: 24px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .brand-text { font-size: 19px; }
}