/* roulang page: index */
:root {
  --bg-primary: #0A1424;
  --bg-secondary: #0F1D33;
  --bg-tertiary: #14243F;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.10);
  --brand-blue: #1D6FF2;
  --cyan: #22D3EE;
  --purple: #7C8CFF;
  --warm-gold: #D9A84A;
  --text-heading: #F2F7FF;
  --text-body: #C7D4E4;
  --text-muted: #8296AE;
  --light-bg: #F6F9FE;
  --light-heading: #1F2937;
  --light-body: #4A5C74;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 9px;
  --shadow-1: 0 12px 40px rgba(0, 0, 0, 0.28);
  --shadow-2: 0 4px 20px rgba(0, 0, 0, 0.20);
  --space-section: clamp(70px, 9vw, 110px);
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); background: var(--bg-primary); color: var(--text-body); line-height: 1.85; font-size: 17px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: 1em; border: none; outline: none; }
:focus-visible { outline: 3px solid rgba(34, 211, 238, 0.45); outline-offset: 3px; border-radius: 4px; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; width: 100%; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border-radius: 12px; font-weight: 600; letter-spacing: 0.02em; height: 52px; padding: 0 26px; font-size: 16px; cursor: pointer; transition: all .3s ease; border: none; white-space: nowrap; }
.btn-primary { background: linear-gradient(135deg, #2b8fff 0%, #1D6FF2 55%, #185fcf 100%); color: #fff; box-shadow: 0 8px 30px rgba(29, 111, 242, 0.30), inset 0 1px 0 rgba(255,255,255,0.24); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 38px rgba(29, 111, 242, 0.44); }
.btn-primary:active { transform: translateY(-1px); }
.btn-glow { background: linear-gradient(135deg, #22D3EE 0%, #1D6FF2 100%); color: #08101e; }
.btn-glow:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(34, 211, 238, 0.33); }
.btn-secondary { background: rgba(255, 255, 255, 0.06); color: #ecf5ff; border: 1px solid rgba(255,255,255,0.16); backdrop-filter: blur(8px); }
.btn-secondary:hover { border-color: rgba(34, 211, 238, 0.77); background: rgba(255,255,255,0.12); color: #fff; transform: translateY(-2px); }
.btn-light { background: #fff; color: #1d3b66; }
.btn-light:hover { background: #e7eefd; transform: translateY(-2px); box-shadow: var(--shadow-2); }
.section-head { margin-bottom: clamp(36px, 5vw, 54px); max-width: 720px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; letter-spacing: 0.05em; color: var(--cyan); border: 1px solid rgba(34,211,238,0.25); background: rgba(34,211,238,0.07); padding: 6px 15px; border-radius: 100px; margin-bottom: 17px; font-weight: 500; }
.section-head h2, .section-title { color: var(--text-heading); font-size: clamp(28px, 4vw, 42px); font-weight: 700; line-height: 1.35; letter-spacing: -0.01em; }
.section-head p, .section-desc { color: var(--text-muted); font-size: 17px; margin-top: 16px; line-height: 1.9; }

/* ===== Header ===== */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(10,20,36,0.72); backdrop-filter: blur(22px); border-bottom: 1px solid rgba(255,255,255,0.05); transition: background .4s ease, box-shadow .4s ease; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { width: 46px; height: 46px; border-radius: 13px; background: linear-gradient(135deg, #1D6FF2, #22D3EE); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 22px; box-shadow: 0 8px 24px rgba(29,111,242,0.37); letter-spacing: -0.5px; }
.brand-mark i { font-size: 20px; }
.brand-text { font-size: 20px; font-weight: 800; color: var(--text-heading); letter-spacing: 0.02em; white-space: nowrap; }
.brand-text span { color: var(--cyan); }
.nav-wrap { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links > li { position: relative; }
.nav-links > li > a { display: flex; align-items: center; gap: 7px; height: 44px; padding: 0 16px; color: #b7c6dc; font-size: 15.5px; font-weight: 500; border-radius: 9px; transition: all .3s ease; position: relative; }
.nav-links > li > a:hover, .nav-links > li > a.active { color: #fff; background: rgba(255,255,255,0.05); }
.nav-links > li > a.active::after { content: ""; position: absolute; bottom: 0px; left: 22px; right: 22px; height: 2px; border-radius: 2px; background: var(--cyan); box-shadow: 0 0 12px rgba(34,211,238,0.5); }
.nav-arrow { font-size: 12px; color: #667c94; transition: transform .3s ease; }
.nav-links > li:hover .nav-arrow { transform: rotate(180deg); color: var(--cyan); }
.header-cta { display: flex; align-items: center; gap: 18px; }
.nav-drawer-btn { width: 44px; height: 44px; border-radius: 10px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); display: none; align-items: center; justify-content: center; cursor: pointer; transition: all .3s linear; }
.nav-drawer-btn i { color: #cfdff1; font-size: 20px; transition: all .3s linear; }
.nav-drawer-btn.open i::before { content: "\f00d"; }
.mega-panel { position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%); width: 640px; background: rgba(15,29,51,0.92); border: 1px solid rgba(255,255,255,0.11); border-radius: var(--radius-lg); box-shadow: var(--shadow-1); padding: 18px; display: flex; gap: 14px; opacity: 0; visibility: hidden; pointer-events: none; transition: all .35s ease; backdrop-filter: blur(28px); }
.nav-links > li.mega-trigger:hover .mega-panel { opacity: 1; visibility: visible; pointer-events: auto; top: calc(100% + 8px); }
.mega-panel-grid { flex: 1.3; display: flex; flex-direction: column; }
.mega-panel-title { font-size: 13px; letter-spacing: 0.04em; color: #9eb1cc; padding: 6px 12px 2px; font-weight: 600; }
.mega-links { margin-top: 10px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.mega-links .mega-item { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 12px; transition: background .3s linear; }
.mega-links .mega-item:hover { background: rgba(255,255,255,0.05); }
.mega-item-icon { width: 36px; height: 36px; flex-shrink: 0; border-radius: 10px; background: rgba(124,140,255,0.14); border: 1px solid rgba(124,140,255,0.24); display: flex; align-items: center; justify-content: center; color: #b6c0ff; font-size: 15px; }
.mega-item-content h4 { font-size: 14px; color: #e9f1ff; margin-bottom: 4px; font-weight: 600; line-height: 1.5; }
.mega-item-content p { font-size: 12.5px; color: #8ca1bd; line-height: 1.6; }
.mega-empty-item { padding: 12px; color: #8296AE; font-size: 13.5px; }
.mega-sidebar { width: 210px; flex-shrink: 0; display: flex; flex-direction: column; gap: 12px; }
.mega-banner { border-radius: 16px; height: 120px; background-image: url('/assets/images/coverpic/cover-2.png'); background-size: cover; background-position: center; padding: 13px 14px; display: flex; flex-direction: column; justify-content: flex-end; position: relative; overflow: hidden; box-shadow: var(--shadow-2); }
.mega-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 22%, rgba(3,11,22,0.87)); }
.mega-banner span { position: relative; color: #fff; font-size: 15px; font-weight: 700; }
.mega-banner small { position: relative; font-size: 12px; color: #d1e1f5; }
.mega-shortcut { border-radius: 14px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); padding: 14px; display: flex; align-items: center; gap: 10px; transition: all .3s linear; }
.mega-shortcut:hover { background: rgba(29,111,242,0.13); border-color: var(--brand-blue); }
.mega-shortcut i { color: var(--cyan); width: 26px; text-align: center; font-size: 16px; }
.mega-shortcut span { color: #d9e5f4; font-size: 13.5px; font-weight: 600; line-height: 1.2; }

/* ===== Hero ===== */
.hero { min-height: calc(100vh - 76px); display: flex; align-items: center; position: relative; overflow: hidden; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center 70%; padding: clamp(55px, 8vw, 100px) 0; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(114deg, rgba(6,13,27,0.97) 20%, rgba(8,18,38,0.86) 55%, rgba(10,24,46,0.68) 100%); z-index: 1; }
.hero::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 54px 54px; z-index: 1; opacity: .25; }
.hero .container { position: relative; z-index: 3; display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.hero-copy { max-width: 650px; }
.hero-flag { display: inline-flex; align-items: center; gap: 10px; background: rgba(34,211,238,0.10); border: 1px solid rgba(34,211,238,0.27); border-radius: 100px; padding: 8px 18px; color: #A5F0FB; font-size: 14px; font-weight: 500; margin-bottom: 28px; backdrop-filter: blur(8px); }
.hero-flag i { color: var(--cyan); }
.hero h1 { color: #ffffff; font-size: clamp(42px, 5.4vw, 68px); font-weight: 800; line-height: 1.18; letter-spacing: -0.01em; text-shadow: 0 4px 28px rgba(0,22,55,0.7); margin: 0 0 22px; }
.hero h1 .grad { background: linear-gradient(135deg, #ffffff 0%, #a3f3ff 45%, #69c9ff 90%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { color: #C7DCEF; font-size: 17px; line-height: 1.95; max-width: 560px; margin-bottom: 36px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 19px; align-items: center; }
.hero-tags { position: absolute; bottom: 0; left: 0; right: 0; z-index: 4; border-top: 1px solid rgba(255,255,255,0.08); background: rgba(10,18,31,0.55); backdrop-filter: blur(18px); padding: 0; }
.hero-tags-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.hero-tag { display: flex; align-items: center; gap: 14px; padding: 20px 8px; color: #CFDFF0; font-size: 14.5px; transition: color .3s linear; }
.hero-tag + .hero-tag { border-left: 1px solid rgba(255,255,255,0.06); }
.hero-tag i { color: var(--cyan); font-size: 19px; width: 24px; text-align: center; }
.hero-tag strong { color: #fff; font-weight: 600; }
.hero-panel { position: relative; }
.hero-glass { background: rgba(14,28,52,0.60); border-radius: 28px; border: 1px solid rgba(255,255,255,0.14); padding: 30px; box-shadow: 0 25px 60px rgba(0,0,0,0.45); backdrop-filter: blur(20px); overflow: hidden; }
.hero-glass::before { content: ""; position: absolute; top: 0; left: 12%; right: 12%; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.45), transparent); }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; padding-bottom: 22px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.panel-head h3 { color: #fff; font-size: 19px; font-weight: 700; }
.panel-status { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: #a7eabd; background: rgba(35,187,110,0.12); border: 1px solid rgba(46,213,131,0.26); padding: 6px 15px; border-radius: 100px; }
.panel-status i { font-size: 10px; }
.panel-list { display: flex; flex-direction: column; gap: 18px; }
.panel-row { display: flex; gap: 17px; }
.panel-row-icon { width: 55px; height: 55px; border-radius: 16px; background: linear-gradient(135deg, rgba(29,111,242,0.28), rgba(34,211,238,0.15)); border: 1px solid rgba(34,211,238,0.3); display: flex; align-items: center; justify-content: center; color: var(--cyan); flex-shrink: 0; font-size: 21px; box-shadow: 0 4px 18px rgba(29,111,242,0.2); }
.panel-row-content { flex: 1; }
.panel-row-content h4 { color: #EDF5FF; font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.panel-row-content p { color: #93A9C3; font-size: 13.5px; line-height: 1.7; }

/* ===== Sections ===== */
.main-section { padding: var(--space-section) 0; background: var(--bg-primary); }
.main-section.alt { background: var(--bg-secondary); position: relative; }
.section-sep { height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06) 20%, rgba(255,255,255,0.06) 80%, transparent); }

/* Ladder cards */
.ladder-grid { display: flex; gap: 28px; align-items: flex-start; justify-content: center; }
.ladder-card { flex: 1; background: linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.03)); border: 1px solid rgba(255,255,255,0.095); border-radius: 26px; padding: 38px 30px 30px; position: relative; transition: all .4s ease; backdrop-filter: blur(20px); box-shadow: var(--shadow-2); }
.ladder-card:nth-child(1) { margin-top: 0; }
.ladder-card:nth-child(2) { margin-top: 36px; }
.ladder-card:nth-child(3) { margin-top: 10px; }
.ladder-card:hover { transform: translateY(-6px); border-color: var(--brand-blue); background: linear-gradient(145deg, rgba(73,138,255,0.10), rgba(255,255,255,0.03)); box-shadow: 0 20px 55px rgba(0,0,0,0.3), 0 0 0 1px rgba(29,111,242,0.10); }
.ladder-card:nth-child(2).ladder-card:hover { border-color: var(--cyan); }
.ladder-num { position: absolute; top: -20px; left: 24px; background: linear-gradient(135deg, #174eb6, #18bcd3); border-radius: 14px; width: 58px; height: 48px; display: flex; align-items: center; justify-content: center; font-weight: 800; color: #fff; font-size: 20px; box-shadow: 0 10px 24px rgba(29,111,242,0.38); }
.ladder-card:nth-child(2) .ladder-num-num, .ladder-card:nth-child(2) .ladder-num { background: linear-gradient(135deg, #111354, #4d4bff); }
.ladder-card:nth-child(3) .ladder-num { background: linear-gradient(135deg, #0f4055, #23d199); }
.ladder-card h3 { color: #EDF5FF; font-size: 23px; margin: 8px 0 20px; font-weight: 700; line-height: 1.4; }
.ladder-card p { color: #A3B5CD; font-size: 15.5px; line-height: 1.9; margin-bottom: 24px; }
.ladder-feature { display: flex; flex-direction: column; gap: 12px; border-top: 1px solid rgba(255,255,255,0.07); padding-top: 22px; margin-bottom: 27px; }
.ladder-feature span { color: #b8c8de; font-size: 14.5px; display: flex; align-items: center; gap: 10px; }
.ladder-feature i { color: var(--cyan); width: 20px; text-align: center; font-size: 14px; }
.ladder-link { font-weight: 600; font-size: 15px; color: var(--cyan); display: inline-flex; align-items: center; gap: 8px; transition: all .3s ease; }
.ladder-link i { transition: transform .3s ease; }
.ladder-link:hover { color: #ffffff; }
.ladder-link:hover i { transform: translateX(4px); }

/* Compare */
.compare-section {}
.compare-main { display: flex; border-top: 1px solid transparent; }
.compare-label { width: 205px; margin-right: 42px; padding-top: 15px; align-self: start; }
.compare-plan-head { display: flex; flex-direction: column; gap: 8px; }
.compare-wrap { display: grid; grid-template-columns: 1fr 1.15fr 1fr; gap: 0px; }
.plan-box { position: relative; padding: 38px 28px 24px; transition: all .35s ease; border-radius: 10px; background: rgba(255,255,255,0.025); }
.plan-box + .plan-box { border-left: 1px solid rgba(255,255,255,0.07); }
.plan-box + .plan-box + .plan-box { border-left: 1px solid rgba(255,255,255,0.05); }
.plan-box:hover { background: rgba(255,255,255,0.04); }
.plan-box.recommend { border-top: 3px solid var(--cyan); background: rgba(34,211,238,0.055); box-shadow: 0 16px 44px rgba(34,211,238,0.07); border-radius: 18px; margin: -12px -10px; padding: 50px 35px 34px; z-index: 2; border-left: 1px solid rgba(34,211,238,0.13) !important; border-right: 1px solid rgba(34,211,238,0.13) !important; border-bottom: 1px solid rgba(34,211,238,0.14); }
.plan-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); color: #02171f; background: linear-gradient(135deg, #8af4ff, #22D3EE); font-size: 13px; font-weight: 800; letter-spacing: 0.06em; padding: 6px 20px; border-radius: 100px; box-shadow: 0 6px 18px rgba(34,211,238,0.33); white-space: nowrap; }
.plan-name { display: flex; align-items: center; font-size: 18px; color: #d5e4ff; font-weight: 700; margin-bottom: 12px; gap: 8px; }
.plan-box.recommend .plan-name { color: #bff9ff; font-size: 21px; }
.plan-box .fa-circle-check { color: var(--cyan); font-size: 19px; }
.feature-table-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; border-radius: var(--radius-lg); }
.feat-title { width: 145px; background: rgba(255,255,255,0.30); padding: 18px 0; font-weight: 600; color: #f4fbff; margin-right: 10px; text-align: right; padding-right: 24px; }
.compare-row { display: flex; align-items: flex-start; }
.plan-data { display: flex; flex-direction: column; gap: 19px; }
.plan-row { color: #a7bad4; font-size: 14.5px; border-bottom: 1px solid rgba(255,255,255,0.045); padding-bottom: 17px; line-height: 1.55; }
.plan-row strong { color: #dbeaff; margin-right: 8px; font-weight: 600; }
.plan-row i { color: var(--cyan); margin-right: 4px; }
.compare-btn { margin-top: 18px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; height: 46px; padding: 0 25px; border-radius: 11px; font-weight: 600; font-size: 14.5px; background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.14); color: #d7e7ff; transition: all .3s ease; cursor: pointer; }
.plan-box.recommend .compare-btn { background: #22D3EE; color: #001f2f; border: none; box-shadow: 0 8px 26px rgba(34,211,238,0.35); width: 100%; height: 52px; font-size: 16px; }
.compare-btn:hover { border-color: var(--cyan); color: #fff; transform: translateX(3px); }
/* simplified alternative display */
.compare-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.compare-grid-col { display: flex; flex-direction: column; gap: 14px; }
.compare-label-title { color: #88a3c5; font-size: 16px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.compare-label-title i { color: var(--cyan); }
.plan-row-title { color: #d3e7ff; font-weight: 600; font-size: 15px; margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
.row-icon { color: var(--brand-blue); }

/* ===== CTA strip ===== */
.cta-strip { background: linear-gradient(rgba(8,16,32,0.85), rgba(8,16,32,0.92)), url('/assets/images/backpic/back-2.webp'); background-size: cover; background-position: center; border-radius: 0px; margin: 0; position: relative; overflow: hidden; border-top: 1px solid rgba(255,255,255,0.07); border-bottom: 1px solid rgba(255,255,255,0.07); }
.cta-strip-inner { max-width: 1280px; margin: 0 auto; padding: clamp(60px, 10vw, 128px) 32px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-strip-title { max-width: 640px; }
.cta-strip .eyebrow { color: #ffd88f; border-color: rgba(255,190,80,0.26); background: rgba(255,190,80,0.08); }
.cta-strip h2 { color: #fff; font-size: clamp(26px, 4.4vw, 38px); line-height: 1.35; font-weight: 700; }
.cta-strip h2 .lite { color: #67e5fd; }
.cta-strip p { color: #c9dbf0; font-size: 16.5px; margin-top: 13px; line-height: 1.85; max-width: 600px; }
.cta-strip-action { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; max-width: 280px; }
.cta-chip { display: inline-flex; align-items: center; gap: 10px; color: #a7e7f5; font-size: 14.5px; border: 1px solid rgba(34,211,238,0.28); background: rgba(34,211,238,0.07); padding: 10px 22px; border-radius: 100px; backdrop-filter: blur(6px); }
.cta-chip .dot { width: 9px; height: 9px; border-radius: 100px; background: var(--cyan); box-shadow: 0 0 0 4px rgba(34,211,238,0.18); display: block; animation: pulse 2.4s infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 3px rgba(34,211,238,0.2); } 50% { box-shadow: 0 0 0 7px rgba(34,211,238,0.05); } }

/* ===== News / CMS section ===== */
.news-section { background: var(--bg-primary); }
.news-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 50px; flex-wrap: wrap; }
.news-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 28px; align-items: stretch; }
.news-feature-side { }
.news-list-side { display: flex; flex-direction: column; }
.news-feature-card { position: relative; border-radius: 26px; overflow: hidden; min-height: 400px; display: flex; align-items: flex-end; box-shadow: var(--shadow-1); background: #0D1930; border: 1px solid rgba(255,255,255,0.09); transition: all .4s ease; }
.news-feature-card:hover { transform: translateY(-4px); box-shadow: 0 24px 50px rgba(0,0,0,0.35); border-color: rgba(34,211,238,0.35); }
.news-fc-img { position: absolute; inset: 0; background-size: cover; background-position: center; z-index: 0; }
.news-fc-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(186deg, rgba(8,16,30,0) 0%, rgba(7,14,30,0.56) 62%, rgba(7,14,30,0.97) 100%); }
.news-fc-content { position: relative; z-index: 2; padding: 30px; display: flex; flex-direction: column; gap: 8px; width: 100%; }

.news-badge { display: inline-flex; align-items: center; gap: 8px; align-self: flex-start; border: 1px solid rgba(34,211,238,0.38); color: #b8f6ff; background: rgba(14,18,44,0.5); padding: 5px 17px; border-radius: 100px; font-size: 13px; margin-bottom: 4px; }
.news-fc-content h3 { color: #fff; font-size: 25px; font-weight: 700; line-height: 1.45; }
.news-fc-content p { color: #C3D3E8; font-size: 15px; line-height: 1.85; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-top: 8px; }
.news-fc-meta { display: flex; gap: 18px; color: #c2d8ec; font-size: 13px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.15); margin-top: 12px; flex-wrap: wrap; }
.news-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 300px; border: 1px dashed rgba(255,255,255,0.17); border-radius: 26px; background: rgba(255,255,255,0.025); box-sizing: border-box; text-align: center; padding: 20px 34px; }
.news-empty i { font-size: 46px; color: #425a78; margin-bottom: 22px; opacity: .7;}
.news-empty p { color: var(--text-muted); font-size: 16px; line-height: 1.8; }
.empty-desc { font-size: 13.5px !important; color: #5d7ca3 !important; margin-top: 8px; }

.news-list-card { padding: 0; border: none; }
.news-row { display: flex; align-items: flex-start; gap: 2px; padding: 22px 4px; transition: background .3s, padding .3s; border-bottom: 1px solid rgba(255,255,255,0.06); border-radius: 14px; position: relative; }
.news-row:first-child { padding-top: 1px; }
.news-row:hover { background: rgba(29,111,242,0.05); padding-left: 14px; padding-right: 14px; border-radius: 20px; }
.news-row:hover .news-row-link { color: var(--cyan); }
.news-row-content { flex: 1; min-width: 0; }
.news-row-content h4 { font-size: 16.5px; color: #D9E8FF; font-weight: 600; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color .3s ease; }
.news-row-content p { font-size: 14px; color: #91a5bd; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; margin-top: 8px; }
.news-row-meta { display: flex; align-items: center; gap: 18px; margin-top: 12px; font-size: 12.5px; color: #687bd0; }
.news-row-meta .ntag { color: var(--cyan); background: rgba(34,211,238,0.09); padding: 2px 10px; border-radius: 5px; }
.news-row-arrow { display: flex; align-items: center; justify-content: center; flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%; background: rgba(29,111,242,0.09); border: 1px solid rgba(29,111,242,0.18); color: #6a9eff; margin-left: 14px; transition: all .3s linear; }
.news-row:hover .news-row-arrow { background: var(--brand-blue); border-color: var(--brand-blue); color: #fff; transform: rotate(-45deg); }
.news-row-empty { border: 1px dashed rgba(255,255,255,0.14); border-radius: 22px; padding: 24px 20px; text-align: center; color: #7188a5; background: rgba(0,0,0,0.1); }
.news-row-empty i { margin-bottom: 14px; font-size: 27px; display: inline-block; }
.news-more { text-align: right; margin-top: 32px; }
.news-more a { display: inline-flex; align-items: center; gap: 10px; color: #83b8ff; font-weight: 600; font-size: 15px; transition: all .25s linear; }
.news-more a:hover { gap: 14px; color: var(--cyan); }

/* ===== Form + FAQ ===== */
.contact-section { background: var(--bg-secondary); }
.contact-panel { display: grid; grid-template-columns: 7fr 5fr; border-radius: 30px; overflow: hidden; border: 1px solid rgba(255,255,255,0.18); background: rgba(14,23,48,0.6); backdrop-filter: blur(24px); box-shadow: var(--shadow-1); }

.contact-form-wrap { padding: clamp(30px, 6vw, 62px); background: linear-gradient(145deg, rgba(124,140,255,0.04), transparent); border-right: 1px solid rgba(255,255,255,0.08); }
.form-form { margin-top: 32px; }
.form-form-field + .form-form-field { margin-top: 18px; }
.form-form-field { }
.form-form-field label { display: block; color: #cfdff1; font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.form-form-field input, .form-form-field select, .form-form-field textarea { width: 100%; padding: 14px 19px; border-radius: 13px; border: 1px solid rgba(255,255,255,0.12); background: rgba(4,11,24,0.45); color: #b8d2ee; transition: border .3s, box-shadow .3s, background .3s; resize: vertical }
.form-form-field input:focus, .form-form-field select:focus, .form-form-field textarea:focus { border-color: var(--cyan); background: rgba(3,9,21,0.7); box-shadow: 0 0 0 4px rgba(34,211,238,0.10); color: #fff; }
.form-form-field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 7'%3E%3Cpath fill='%237d96c4' d='M5 7 0 0h10L5 7Z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 18px center; }
.form-form-field textarea { min-height: 130px; line-height: 1.8; }
.form-form-field select option { background: #0F1D33; }
.btn-submit { width: 100%; margin-top: 26px; height: 54px; font-size: 17px; letter-spacing: 0.04em; }
.form-tip { margin-top: 16px; display: flex; align-items: flex-start; gap: 9px; color: #7290b2; font-size: 13px; line-height: 1.6 }
.form-tip i { margin-top: 2px; }

/* FAQ */
.faq-wrap { padding: clamp(30px, 5vw, 52px); display: flex; flex-direction: column; background: rgba(15,20,40,0.31); }
.faq-heading { font-size: 22px; margin-bottom: 6px; color: #eef8ff; font-weight: 700; }
.faq-list { margin-top: 14px; }
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.07); transition: border-color .3s; }
.faq-q { display: flex; gap: 14px; align-items: stretch; justify-content: space-between; padding: 23px 0; cursor: pointer; transition: padding 0.3s; }
.faq-q h4 { font-size: 16.5px; color: #e2edff; font-weight: 600; line-height: 1.7; flex: 1; }
.faq-q h4::before { content: "Q"; display: inline-block; margin-right: 6px; color: var(--brand-blue); font-weight: 500; }
.faq-icon { flex-shrink: 0; width: 27px; height: 27px; border-radius: 50%; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.09); display: flex; align-items: center; justify-content: center; color: #9fc6ff; transition: transform .35s, color .3s; }
.faq-item.open .faq-icon { transform: rotate(180deg); color: var(--cyan); border-color: var(--cyan); }
.faq-a { display: none; padding: 0 15px 30px 18px; color: #aebdDA; font-size: 15px; line-height: 2; background: transparent; }
.faq-a::first-letter { color: var(--cyan); font-weight: 600; }
.faq-item.open .faq-a { display: block; }
.faq-link-tip { display: inline-flex; color: var(--cyan); font-size: 13.5px; margin-top: 3px; font-weight: 500; gap: 8px; transition: all .3s; cursor: pointer; }
.faq-link-tip:hover { gap: 12px; }

/* ===== Footer ===== */
.site-footer { background: #060E1C; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 36px; padding: clamp(58px, 8vw, 86px) 0 48px; }
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand p { color: #5f7298; font-size: 15px; max-width: 300px; line-height: 1.95; }
.footer-col h4 { color: #c4d5ea; font-weight: 600; font-size: 16px; margin-bottom: 23px; letter-spacing: 0.03em; }
.footer-col ul li { margin-bottom: 11px; font-size: 14.5px; color: #8296ae; }
.footer-col ul li a { transition: all .3s ease; display: inline-block; color: inherit; }
.footer-col ul li a:hover { color: var(--cyan); transform: translateX(4px); }
.footer-col ul li a svg, .footer-col ul li a i { margin-right: 8px; font-size: 14px; width: 18px; text-align: center; color: #5149cb; }
.footer-info-list li { display: flex; gap: 13px; align-items: flex-start; line-height: 1.6; }
.footer-info-list li i { color: var(--cyan); margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding: 22px 0 26px; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; color: #5b6987; font-size: 14px; }
.footer-bottom a { color: #7a9fc9; }
.footer-bottom a:hover { color: var(--cyan); text-decoration: underline; }

/* ===== Responsive ===== */
@media (max-width: 1199px) {
  .hero .container { grid-template-columns: 1.2fr .8fr; gap: 45px; }
  .nav-links { gap: 0; }
  .nav-links > li > a { padding: 0 10px; }
  .header-cta .btn { height: 44px; padding: 0 20px; }
  .mega-panel { transform: translateX(-27%); left: auto; right: 0; }
  .ladder-grid { gap: 18px; }
  .ladder-card { padding-left: 22px; padding-right: 22px; }
  .compare-label { margin-right: 20px; }
  .plan-box { padding: 30px 20px 18px; }
  .plan-box.recommend { padding: 48px 25px 34px; }
}
@media (max-width: 991px) {
  .container { padding: 0 24px; }
  .nav-drawer-btn { display: inline-flex; }
  .nav-wrap { position: fixed; top: 76px; right: -100%; width: min(410px, 88vw); height: calc(100vh - 76px); background: #090F1E; backdrop-filter: blur(24px); flex-direction: column; align-items: stretch; gap: 8px; padding: 24px; transition: right .4s cubic-bezier(.68, .57, .1, .95); box-shadow: 0 -20px 60px rgba(0,0,0,0.45); overflow-y: auto; }
  .nav-wrap.open { right: 0; }
  .nav-links { flex-direction: column; width: 100%; align-items: flex-start; gap: 5px; }
  .nav-links > li { width: 100%; position: static; }
  .nav-links > li > a { width: 100%; height: 52px; padding: 0 20px; justify-content: flex-start; gap: 10px; }
  .nav-links > li > a::after { display: none; }
  .mega-panel { position: static; transform: none; width: 100%; opacity: 1; visibility: visible; background: rgba(7,13,27,0.83); border-radius: 18px; margin-top: 8px; padding: 14px; display: none;border: 1px solid rgba(255,255,255,0.12)}
  .nav-links > li.mega-trigger.open .mega-panel { display: flex; }
  .mega-trigger { flex-direction: column !important; align-items: stretch; }
  .mega-sidebar { display: none; }
  .header-cta .btn-header { display: none; }
  .header-cta { gap: 0; }
  .hero .container { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-bottom: 90px; background-position: center; }
  .hero-sub { max-width: none; }
  .hero-tags-inner { display: grid; grid-template-columns: repeat(2, 1fr); }
  .hero-tag { padding: 14px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .hero-tag br { display: none; }
  .hero-tag + .hero-tag { border-left: none; }
  .hero-tag:nth-child(3) { border-left : none; border-left: none; }
  .ladder-grid { flex-direction: column; gap: 53px; align-items: stretch; }
  .ladder-card:nth-child(2) { margin-top: 6px; }
  .ladder-card:nth-child(3) { margin-top: 6px; }
  .news-grid { grid-template-columns: 1fr; }
  .contact-panel { grid-template-columns: 1fr; }
  .contact-form-wrap { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .faq-wrap { padding: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .compare-wrap { grid-template-columns: 1fr; gap: 0px; max-width: 550px; }
  .plan-box, .plan-box.recommend { margin: 0; padding: 25px 25px; border-radius: 20px; border: 1px solid rgba(255,255,255,0.08) !important; margin-bottom: 20px; }
  .plan-box.recommend { border-left: 1px solid var(--cyan) !important; border-top: 1px solid rgba(34,211,238,0.5); box-shadow: 0 14px 30px rgba(34,211,238,0.12); }
  .compare-label { display: none; }
  .plan-row-title i { min-width: 22px; }
  .cta-strip-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 767px) {
  body { font-size: 16px; }
  .brand-text { font-size: 17px; }
  .brand-mark { width: 42px; height: 42px; font-size: 19px; border-radius: 11px; }
  .section-head h2, .section-title { font-size: 28px; }
  .hero-tags-inner { grid-template-columns: 1fr 1fr; }
  .hero-tags { position: relative; margin-top: 20px; }
  .hero { padding-top: 45px; padding-bottom: 40px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: flex-start; flex-direction: column; align-items: flex-start; }
  .contact-form-wrap, .faq-wrap { padding: 30px 24px; }
  .news-row-content h4 { font-size: 15.5px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 39px; }
  .hero-btns .btn { width: 100%; }
  .hero-tag { flex-direction: column; align-items: flex-start; font-size: 13.5px; }
  .hero-tag i { margin-right: 0px; margin-bottom: 6px; }
  .ladder-link i {  }
  .header-cta .btn { width: 84px; padding: 0; justify-content: center; font-size: 13px; display: none; }
  .news-tag { flex-wrap: wrap; }
  .news-more { text-align: left; }
  .cta-strip-action { max-width: none; align-items: stretch; }
}

/* roulang page: category1 */
:root {
  --bg: #0A1424;
  --bg-2: #0F1D33;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.07);
  --blue: #1D6FF2;
  --cyan: #22D3EE;
  --violet: #7C8CFF;
  --heading: #F2F7FF;
  --body: #C7D4E4;
  --muted: #8296AE;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
  --gutter: 28px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--body);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
body::selection {
  background: rgba(34, 211, 238, 0.28);
  color: #fff;
}
ul, ol {
  list-style: none;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button, input, textarea, select {
  font-family: inherit;
  font-size: 100%;
  border: none;
  outline: none;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section {
  padding: 96px 0;
}
.section-head {
  max-width: 840px;
  margin-bottom: 52px;
}
.section-head .tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.03em;
  padding: 7px 16px;
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
  margin-bottom: 18px;
}
.section-head h2 {
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.3;
  color: var(--heading);
  font-weight: 650;
  letter-spacing: -0.01em;
}
.section-head p {
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 720px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.03em;
  padding: 6px 14px;
  border: 1px solid rgba(34, 211, 238, 0.26);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.06);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 26px;
  border-radius: 13px;
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn i {
  font-size: 15px;
  transition: transform 0.2s ease;
}
.btn:hover i {
  transform: translateX(3px);
}
.btn:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.45);
  outline-offset: 3px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #08111f;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.16) inset, 0 12px 26px rgba(29, 111, 242, 0.28);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2f7eff, #3fdcf5);
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.22) inset, 0 16px 34px rgba(29, 111, 242, 0.34);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--heading);
  border-color: var(--line);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(34, 211, 238, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 20, 36, 0.74);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(7, 14, 26, 0.92);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 82px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--heading);
  font-size: 22px;
  line-height: 1.25;
  font-weight: 700;
  white-space: nowrap;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 19px;
  color: #fff;
  background: linear-gradient(145deg, #1D6FF2, #22D3EE);
  box-shadow: 0 8px 20px rgba(29, 111, 242, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.12) inset;
  flex: 0 0 auto;
}
.brand-text {
  font-size: 21px;
}
.brand-text span {
  font-weight: 500;
  color: #B8CBE2;
}
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  color: var(--heading);
  font-size: 19px;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(34, 211, 238, 0.4);
}
.nav-toggle:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.45);
  outline-offset: 2px;
}
.nav-wrap {
  display: flex;
  align-items: center;
}
.nav-links-wrap {
  display: flex;
  align-items: center;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links > li {
  position: relative;
}
.nav-links > li > a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 17px;
  color: var(--body);
  font-size: 16px;
  border-radius: 12px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links > li > a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}
.nav-links > li > a.active {
  color: #fff;
  background: rgba(34, 211, 238, 0.12);
}
.nav-links > li > a.active::after {
  content: "";
  position: absolute;
  left: 17px;
  right: 17px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.75);
}
.nav-links .mega-trigger > a {
  padding-right: 15px;
}
.nav-arrow {
  font-size: 12px;
  opacity: 0.75;
  transition: transform 0.2s ease;
}
.mega-trigger:hover .nav-arrow,
.mega-trigger.open .nav-arrow {
  transform: rotate(180deg);
}
.mega-panel {
  position: absolute;
  top: calc(100% + 14px);
  right: -18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 20px;
  width: 680px;
  padding: 24px;
  background: rgba(13, 26, 45, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) scale(0.99);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  z-index: 300;
  pointer-events: none;
}
.mega-trigger:hover .mega-panel,
.mega-trigger.open .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.mega-panel::before {
  content: "";
  position: absolute;
  top: -7px;
  right: 80px;
  width: 12px;
  height: 12px;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(13, 26, 45, 0.98);
  transform: rotate(45deg);
}
.mega-panel-grid {
  min-width: 0;
}
.mega-panel-title {
  color: var(--heading);
  font-size: 18px;
  font-weight: 650;
  padding-bottom: 3px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
  letter-spacing: 0.01em;
}
.mega-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mega-item {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.mega-item:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-2px);
}
.mega-item-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 16px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.2);
  flex: 0 0 auto;
}
.mega-item-content {
  min-width: 0;
}
.mega-item-content h4 {
  font-size: 15px;
  color: var(--heading);
  font-weight: 600;
  line-height: 1.5;
}
.mega-item-content p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.mega-empty-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 15px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px dashed rgba(255, 255, 255, 0.16);
  color: var(--muted);
  font-size: 14px;
}
.mega-sidebar {
  min-width: 0;
}
.mega-banner {
  height: 100%;
  min-height: 190px;
  border-radius: 20px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  padding: 18px;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}
.mega-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 20, 36, 0.12), rgba(10, 20, 36, 0.82));
  border-radius: 20px;
  pointer-events: none;
}
.mega-banner span {
  position: relative;
  z-index: 1;
  font-size: 15px;
  line-height: 1.7;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}
/* page-lead */
.page-lead {
  background:
    linear-gradient(90deg, rgba(10, 20, 36, 0.92) 0%, rgba(10, 20, 36, 0.75) 50%, rgba(15, 29, 51, 0.5) 100%),
    linear-gradient(180deg, rgba(15, 29, 51, 0.7), rgba(10, 20, 36, 0.85)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 82px 0 76px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
}
.breadcrumb a {
  color: var(--body);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--cyan);
}
.breadcrumb i {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.24);
}
.page-lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 64px;
  align-items: center;
}
.page-lead-main .eyebrow {
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.04em;
  padding: 7px 15px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 999px;
}
.page-lead h1 {
  font-size: clamp(38px, 5.1vw, 68px);
  line-height: 1.18;
  color: var(--heading);
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-bottom: 24px;
}
.page-lead h1 span {
  color: var(--cyan);
}
.lead-summary {
  font-size: 18px;
  line-height: 2;
  color: #D4E0EE;
  max-width: 600px;
  margin-bottom: 34px;
}
.lead-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.lead-index {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 26px;
  padding: 30px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: relative;
  overflow: hidden;
}
.lead-index::after {
  content: "\f138";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  right: 10px;
  bottom: -12px;
  font-size: 92px;
  color: rgba(255, 255, 255, 0.035);
  pointer-events: none;
}
.lead-index-label {
  display: block;
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.04em;
  font-weight: 600;
  margin-bottom: 22px;
}
.lead-index a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--body);
  font-size: 16px;
  margin-bottom: 12px;
  transition: background 0.2s, border-color 0.2s, transform 0.2s, color 0.2s;
}
.lead-index a:last-child {
  margin-bottom: 0;
}
.lead-index a i {
  color: var(--cyan);
  transition: transform 0.2s;
}
.lead-index a:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(34, 211, 238, 0.38);
  color: #fff;
  transform: translateX(3px);
}
.lead-index a:hover i {
  transform: translateX(4px);
}
.lead-index-note {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}
.lead-index-note .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.4);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.35);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(34, 211, 238, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(34, 211, 238, 0);
  }
}
/* intro overview */
.intro-section {
  background: var(--bg);
}
.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 48px;
  align-items: center;
}
.intro-list {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}
.intro-list-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}
.intro-list-item:first-child {
  padding-top: 4px;
}
.intro-list-item:last-child {
  padding-bottom: 2px;
  border-bottom: none;
}
.intro-list-item .icon {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 19px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.2);
}
.intro-list-item h3 {
  color: var(--heading);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 5px;
  line-height: 1.5;
}
.intro-list-item p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}
.intro-cover {
  height: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 360px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.intro-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.cover-note {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  padding: 16px 18px;
  background: rgba(10, 20, 36, 0.76);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  color: #E8F0F8;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1.7;
  z-index: 1;
}
.cover-note i {
  color: var(--cyan);
}
/* steps */
.steps-section {
  background: var(--bg-2);
  position: relative;
  overflow: hidden;
}
.steps-section::before {
  content: "";
  position: absolute;
  top: 12%;
  right: -140px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 140, 255, 0.13), transparent 68%);
  pointer-events: none;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
  position: relative;
  z-index: 1;
}
.step-card {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 26px;
  padding: 30px 30px 34px;
  position: relative;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.step-card:nth-child(even) {
  margin-top: 58px;
}
.step-card:hover {
  transform: translateY(-5px);
  border-color: rgba(34, 211, 238, 0.38);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.24);
}
.step-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 28px;
  right: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.4), transparent);
}
.step-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.step-num {
  font-family: "SF Pro Display", "Segoe UI", sans-serif;
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.next-arrow {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--cyan);
  transition: background 0.2s, transform 0.2s, border-color 0.2s;
}
.step-card:hover .next-arrow {
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateX(3px);
}
.step-mini-label {
  display: block;
  font-size: 13px;
  color: var(--cyan);
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}
.step-card h3 {
  font-size: 22px;
  color: var(--heading);
  line-height: 1.5;
  font-weight: 620;
  margin-bottom: 12px;
}
.step-card p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}
.step-card .step-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 19px;
}
.step-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: #BDCBDF;
  padding: 5px 11px;
  border-radius: 999px;
}
/* detail row */
.tips-band {
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.tip-card {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 22px;
  padding: 27px 24px;
  min-height: 210px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  position: relative;
}
.tip-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-4px);
}
.tip-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: rgba(34, 211, 238, 0.1);
  color: var(--cyan);
  font-size: 19px;
  margin-bottom: 16px;
  border: 1px solid rgba(34, 211, 238, 0.18);
}
.tip-card h3 {
  color: var(--heading);
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 8px;
  font-weight: 600;
}
.tip-card p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
}
.status-line {
  margin-top: auto;
}
/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-wrap {
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0 22px;
  transition: border-color 0.2s, background 0.2s;
}
.faq-item[open] {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(34, 211, 238, 0.3);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  padding: 21px 0;
  color: var(--heading);
  font-size: 17px;
  font-weight: 560;
  line-height: 1.6;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--cyan);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.14);
  transition: transform 0.2s;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-answer {
  padding: 4px 0 24px;
  color: var(--body);
  font-size: 16px;
  line-height: 1.9;
  max-width: 780px;
}
/* CTA */
.cta-strip {
  background: linear-gradient(90deg, rgba(10, 20, 36, 0.92), rgba(15, 29, 51, 0.74)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: #fff;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 72px 0;
}
.cta-copy h2 {
  color: #fff;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.3;
  margin-bottom: 12px;
  font-weight: 650;
}
.cta-copy p {
  color: #C7D6E8;
  font-size: 17px;
  line-height: 1.8;
  max-width: 560px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex: 0 0 auto;
}
/* footer */
.site-footer {
  background: #07101E;
  color: var(--body);
  padding: 64px 0 22px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.5fr;
  gap: 42px;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.footer-brand p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 300px;
  margin-top: 18px;
}
.footer-col h4 {
  color: #E9F1FA;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.footer-col li a,
.footer-col li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--muted);
  transition: color 0.2s, transform 0.2s;
}
.footer-col li a:hover {
  color: var(--cyan);
  transform: translateX(3px);
}
.footer-col li i {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
  width: 16px;
  text-align: center;
}
.footer-info-list li {
  align-items: flex-start;
  line-height: 1.7;
}
.footer-info-list li i {
  margin-top: 7px;
  flex: 0 0 auto;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 22px;
  font-size: 14px;
  color: #5C7087;
}
.footer-bottom a {
  color: #8CA1B8;
  transition: color 0.2s;
}
.footer-bottom a:hover {
  color: var(--cyan);
}
/* responsive */
@media (max-width: 1199px) {
  .nav-links > li > a {
    padding: 10px 12px;
    font-size: 15px;
  }
  .brand-text {
    font-size: 19px;
  }
  .lead-index {
    padding: 24px;
  }
}
@media (max-width: 991px) {
  .section {
    padding: 76px 0;
  }
  .site-header .container {
    height: 74px;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-wrap {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(8, 16, 29, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.32s ease;
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.36);
  }
  .nav-wrap.open {
    max-height: calc(100vh - 74px);
    overflow-y: auto;
  }
  .nav-links-wrap {
    display: block;
    padding: 16px 14px 26px;
  }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
  }
  .nav-links > li > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 16px;
    font-size: 16px;
    border-radius: 14px;
  }
  .nav-links > li > a.active::after {
    display: none;
  }
  .nav-links > li > a.active {
    background: rgba(34, 211, 238, 0.1);
  }
  .mega-trigger {
    display: flex;
    flex-direction: column;
  }
  .mega-trigger > a {
    width: 100%;
  }
  .mega-panel {
    position: static;
    width: auto;
    max-height: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    pointer-events: auto;
    transition: max-height 0.28s ease, padding 0.28s ease;
  }
  .mega-trigger.open .mega-panel {
    display: grid;
    grid-template-columns: 1fr;
    max-height: 720px;
    padding: 10px 0 0 8px;
    background: transparent;
    border: none;
    box-shadow: none;
  }
  .mega-panel::before {
    display: none;
  }
  .mega-panel-grid {
    padding: 0;
  }
  .mega-sidebar {
    display: none;
  }
  .mega-links {
    gap: 10px;
  }
  .mega-item {
    padding: 12px;
  }
  .page-lead {
    padding: 58px 0 52px;
  }
  .page-lead-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }
  .intro-grid {
    grid-template-columns: 1fr;
  }
  .intro-cover {
    min-height: 280px;
  }
  .intro-list {
    padding: 24px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .step-card:nth-child(even) {
    margin-top: 0;
  }
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 60px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}
@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }
  .section-head {
    margin-bottom: 38px;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .page-lead {
    padding: 44px 0 46px;
  }
  .page-lead h1 {
    font-size: 36px;
  }
  .lead-summary {
    font-size: 16px;
  }
  .lead-actions .btn {
    width: 100%;
  }
  .lead-index {
    padding: 20px;
  }
  .intro-list-item {
    gap: 14px;
    padding: 17px 0;
  }
  .intro-list-item .icon {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
  .step-card {
    padding: 26px 22px 28px;
  }
  .tips-grid {
    grid-template-columns: 1fr;
  }
  .tip-card {
    min-height: 0;
  }
  .faq-item summary {
    font-size: 16px;
  }
  .site-footer {
    padding-top: 48px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 28px;
  }
  .footer-bottom {
    justify-content: center;
    text-align: center;
  }
}
@media (max-width: 480px) {
  :root {
    --gutter: 18px;
  }
  .container {
    padding: 0 18px;
  }
  .site-header .container {
    gap: 12px;
  }
  .brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    font-size: 17px;
  }
  .brand-text {
    font-size: 17px;
  }
  .brand-text span {
    font-size: 17px;
  }
  .page-lead h1 {
    font-size: 31px;
  }
  .section-head h2 {
    font-size: 25px;
  }
  .page-lead-grid {
    gap: 28px;
  }
  .intro-grid {
    gap: 28px;
  }
  .intro-list {
    padding: 18px;
  }
  .cover-note {
    left: 12px;
    right: 12px;
    bottom: 12px;
    padding: 13px 14px;
    font-size: 14px;
  }
  .step-card-top .next-arrow {
    width: 38px;
    height: 38px;
  }
  .step-num {
    font-size: 38px;
  }
  .cta-actions {
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-info-list li {
    line-height: 1.8;
  }
}
@media (max-width: 380px) {
  .brand-text {
    display: none;
  }
  .brand-mark {
    width: 46px;
    height: 46px;
  }
  .nav-links-wrap {
    padding: 10px 10px 20px;
  }
}

/* roulang page: article */
:root {
  --bg-deep: #0A1424;
  --bg-mid: #0F1D33;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.1);
  --white: #ffffff;
  --title: #F2F7FF;
  --body: #C7D4E4;
  --muted: #8296AE;
  --primary: #1D6FF2;
  --cyan: #22D3EE;
  --violet: #7C8CFF;
  --gold: #D8B36A;
  --light-bg: #F6F9FE;
  --light-card: #ffffff;
  --light-text: #1F2937;
  --light-muted: #6B7A90;
  --radius-xl: 24px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-lg: 0 30px 80px rgba(4, 12, 24, 0.24);
  --shadow-soft: 0 16px 40px rgba(10, 20, 36, 0.18);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body, .article-surface {
  color: var(--light-text);
}

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: 100%;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

::selection {
  background: rgba(34, 211, 238, 0.25);
  color: #fff;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(6, 12, 25, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-header.scrolled {
  background: rgba(4, 10, 21, 0.93);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.32);
  border-bottom-color: rgba(255, 255, 255, 0.04);
}

.site-header .container {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--title);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(29, 111, 242, 0.2), rgba(34, 211, 238, 0.13));
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: var(--cyan);
  font-size: 20px;
  box-shadow: 0 10px 28px rgba(3, 15, 30, 0.45);
}

.brand-text span {
  color: var(--cyan);
  font-weight: 600;
}

.nav-wrap {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links > li > a {
  display: block;
  padding: 10px 14px;
  border-radius: 12px;
  border-bottom: 2px solid transparent;
  color: #BFD0E8;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.nav-links > li > a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-links > li > a.active {
  color: #fff;
  background: rgba(34, 211, 238, 0.09);
  border-bottom-color: var(--cyan);
}

.nav-links > li > a .nav-arrow {
  margin-left: 5px;
  font-size: 11px;
  opacity: 0.75;
  transition: transform 0.2s ease;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  line-height: 1.2;
  border-radius: 12px;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, transform 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #1D6FF2, #22D3EE);
  color: #fff;
  padding: 12px 22px;
  font-size: 15px;
  box-shadow: 0 10px 28px rgba(29, 111, 242, 0.30);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(34, 211, 238, 0.42);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 10px 18px;
  font-size: 14px;
}

.mega-trigger {
  position: relative;
}

.mega-trigger > a {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mega-trigger .mega-arrow {
  font-size: 11px;
  opacity: 0.7;
  transition: transform 0.2s ease;
}

.mega-trigger:hover .mega-arrow,
.mega-trigger.open .mega-arrow {
  transform: rotate(180deg);
}

.mega-panel {
  position: absolute;
  top: calc(100% + 14px);
  right: -70px;
  width: 680px;
  display: flex;
  gap: 20px;
  padding: 22px;
  background: linear-gradient(145deg, rgba(15, 29, 51, 0.97), rgba(7, 17, 32, 0.94));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.48);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
  z-index: 300;
}

.mega-trigger:hover .mega-panel,
.mega-trigger:focus-within .mega-panel,
.mega-trigger.open .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-panel-grid {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mega-panel-title {
  padding: 0 6px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.mega-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.mega-empty-item {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px dashed rgba(255, 255, 255, 0.12);
  color: #A7BBD0;
  font-size: 14px;
}

.mega-item {
  display: flex;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.mega-item:hover {
  background: rgba(34, 211, 238, 0.08);
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-2px);
}

.mega-item-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(124, 140, 255, 0.14);
  color: var(--violet);
  font-size: 15px;
}

.mega-item-content h4 {
  color: #EDF4FD;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
  line-height: 1.4;
}

.mega-item-content p {
  color: #93A7BE;
  font-size: 13px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mega-sidebar {
  width: 190px;
  flex: 0 0 190px;
}

.mega-banner {
  position: relative;
  height: 100%;
  min-height: 170px;
  border-radius: 16px;
  background-size: cover;
  background-position: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
  overflow: hidden;
}

.mega-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 20, 0.05) 20%, rgba(5, 10, 20, 0.85) 100%);
}

.mega-banner span,
.mega-banner em {
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.24);
}

.mega-banner span {
  color: #fff;
  font-weight: 700;
  font-size: 17px;
}

.mega-banner em {
  color: #E8F2FF;
  font-style: normal;
  font-size: 13px;
  margin-top: 4px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 4px;
  margin: 3px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.6);
}

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Article hero */
.article-header {
  position: relative;
  padding: 138px 0 150px;
  margin-top: 76px;
  background-color: #071222;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.article-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 11, 24, 0.96) 0%, rgba(5, 11, 24, 0.82) 50%, rgba(8, 20, 40, 0.55) 100%);
  pointer-events: none;
}

.article-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 160px;
  background: linear-gradient(to bottom, rgba(6, 13, 26, 0) 0%, rgba(246, 249, 254, 0.96) 100%);
  pointer-events: none;
}

.article-header-content {
  position: relative;
  z-index: 3;
  max-width: 960px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: rgba(214, 228, 246, 0.72);
  font-size: 14px;
  margin-bottom: 28px;
}

.breadcrumb a {
  color: #BFD0E8;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.breadcrumb i {
  font-size: 12px;
  opacity: 0.55;
}

.breadcrumb [aria-current="page"] {
  color: #E3EEFC;
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, 0.3);
  background: rgba(34, 211, 238, 0.12);
  color: #A8ECF9;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}

.article-kicker i {
  font-size: 13px;
}

.article-title {
  color: #F7FBFF;
  font-size: clamp(30px, 4.8vw, 54px);
  line-height: 1.32;
  font-weight: 700;
  max-width: 900px;
  margin: 0 0 22px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.32);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  color: #C3D4E8;
  font-size: 14px;
}

.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.article-meta .meta-item i {
  color: rgba(124, 140, 255, 0.9);
  font-size: 14px;
}

/* Article light reading surface */
.article-surface {
  position: relative;
  z-index: 5;
  background: var(--light-bg);
  padding: 0 0 96px;
  margin-top: -86px;
  border-radius: 38px 38px 0 0;
  color: var(--light-text);
}

.article-surface .container {
  padding-top: 26px;
}

.article-paper {
  max-width: 900px;
  margin: 58px auto 0;
  background: var(--light-card);
  border-radius: var(--radius-xl);
  padding: 54px 64px 64px;
  box-shadow: var(--shadow-lg);
  color: var(--light-text);
}

.article-paper > *:last-child {
  margin-bottom: 0;
}

.article-paper p,
.article-paper li {
  color: #324153;
  font-size: 17px;
  line-height: 1.95;
}

.article-paper p {
  margin-bottom: 24px;
}

.article-paper h2 {
  font-size: 27px;
  font-weight: 700;
  color: #111C2E;
  line-height: 1.4;
  margin: 44px 0 18px;
  padding-top: 6px;
}

.article-paper h3 {
  font-size: 21px;
  font-weight: 700;
  color: #1C2A3D;
  line-height: 1.45;
  margin: 32px 0 14px;
}

.article-paper h4 {
  font-size: 18px;
  color: #1C2A3D;
  margin: 24px 0 12px;
}

.article-paper a {
  color: #164DB5;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(22, 77, 181, 0.3);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.article-paper a:hover {
  color: #0A3E8C;
  text-decoration-color: var(--cyan);
}

.article-paper ul,
.article-paper ol {
  margin: 0 0 24px;
  padding-left: 6px;
}

.article-paper ul li,
.article-paper ol li {
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
}

.article-paper ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1D6FF2, #22D3EE);
}

.article-paper ol {
  counter-reset: article-ol;
}

.article-paper ol li {
  counter-increment: article-ol;
}

.article-paper ol li::before {
  content: counter(article-ol) ".";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: #164DB5;
}

.article-paper blockquote {
  margin: 34px 0;
  padding: 22px 26px;
  border-left: 4px solid var(--cyan);
  border-radius: 0 18px 18px 0;
  background: #EDF7FD;
  color: #33465B;
  font-size: 16px;
  line-height: 1.9;
}

.article-paper blockquote p {
  margin: 0;
  color: inherit;
}

.article-paper img {
  margin: 34px auto;
  border-radius: 18px;
  background: #EDF1F7;
  box-shadow: 0 14px 38px rgba(31, 45, 64, 0.12);
}

.article-paper figure {
  margin: 36px 0;
}

.article-paper figure img {
  margin: 0 auto;
}

.article-paper figcaption {
  text-align: center;
  color: var(--light-muted);
  font-size: 14px;
  margin-top: 12px;
}

.article-paper table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  font-size: 15px;
  background: #fff;
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}

.article-paper th,
.article-paper td {
  padding: 12px 16px;
  border: 1px solid #E4EBF4;
  text-align: left;
  color: #33465B;
}

.article-paper th {
  background: #F1F6FC;
  font-weight: 700;
  color: #142133;
}

.article-paper hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #D3DEEC, transparent);
  margin: 40px 0;
}

/* Article return */
.article-return {
  max-width: 900px;
  margin: 40px auto 0;
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.article-return a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #164DB5;
  font-weight: 600;
  font-size: 15px;
  padding: 10px 20px;
  border-radius: 12px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.article-return a:hover {
  background: #EAF2FD;
  transform: translateY(-2px);
}

/* Related / continue section */
.recommend-section {
  max-width: 900px;
  margin: 60px auto 0;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border-radius: 999px;
  background: #DFEFFF;
  color: #1D6FF2;
  font-size: 13px;
  font-weight: 600;
}

.section-heading h2 {
  font-size: 24px;
  color: #0F1C2F;
  font-weight: 700;
}

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.recommend-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #E7EDF5;
  border-radius: 20px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.recommend-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(29, 111, 242, 0.18);
}

.recommend-card small {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--light-muted);
  font-size: 13px;
  margin-bottom: 10px;
}

.recommend-card small i {
  color: var(--primary);
}

.recommend-card h3 {
  font-size: 18px;
  color: #16233A;
  margin-bottom: 10px;
  line-height: 1.5;
}

.recommend-card p {
  font-size: 14px;
  color: #5F6D80;
  line-height: 1.7;
  margin-bottom: 16px;
}

.recommend-card .text-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #164DB5;
  font-size: 14px;
  font-weight: 600;
}

.recommend-card .text-link i {
  transition: transform 0.2s ease;
}

.recommend-card:hover .text-link i {
  transform: translateX(4px);
}

/* Article missing */
.article-missing {
  max-width: 860px;
  margin: 58px auto 0;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 72px 30px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.missing-icon {
  width: 74px;
  height: 74px;
  margin: 0 auto 24px;
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(29, 111, 242, 0.12), rgba(34, 211, 238, 0.14));
  color: var(--primary);
  font-size: 30px;
}

.article-missing h2 {
  font-size: 26px;
  color: #16233A;
  margin-bottom: 12px;
}

.article-missing p {
  color: #66768A;
  font-size: 16px;
  margin-bottom: 28px;
}

/* Footer */
.site-footer {
  background: #050C1A;
  color: #8DA2B8;
  padding: 76px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.site-footer .brand {
  color: #F2F7FF;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 42px;
}

.footer-brand p {
  color: #7E93AC;
  font-size: 15px;
  line-height: 1.8;
  margin-top: 18px;
  max-width: 310px;
}

.footer-col h4 {
  color: #DCE8F5;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li {
  font-size: 14px;
  line-height: 1.6;
}

.footer-col ul a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #8DA2B8;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col ul a i {
  font-size: 11px;
  color: #5B7A9A;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--cyan);
}

.footer-col ul a:hover i {
  color: var(--cyan);
  transform: translateX(4px);
}

.footer-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #8DA2B8;
  font-size: 14px;
}

.footer-info-list li i {
  color: #5B7A9A;
  margin-top: 4px;
  width: 18px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  margin-top: 58px;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: #64788F;
  font-size: 14px;
}

.footer-bottom a {
  color: #8DA2B8;
  transition: color 0.2s ease;
}

.footer-bottom a:hover {
  color: var(--cyan);
}

/* Responsive */
@media (max-width: 1199px) {
  .site-header .container {
    gap: 14px;
  }

  .nav-links {
    gap: 2px;
  }

  .nav-links > li > a {
    padding: 9px 10px;
    font-size: 14px;
  }

  .mega-panel {
    right: -40px;
    width: 640px;
  }

  .article-paper {
    padding: 48px 48px 54px;
  }
}

@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }

  .nav-wrap {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    background: rgba(5, 12, 25, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 18px;
    max-height: calc(100vh - 76px);
    overflow-y: auto;
    border-radius: 0 0 20px 20px;
  }

  .nav-wrap.open {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav-links > li > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 15px;
    padding: 14px 12px;
    border-radius: 14px;
  }

  .nav-links > li > a.active {
    border-bottom-color: transparent;
  }

  .mega-panel {
    position: static;
    display: none;
    width: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-top: 8px;
    border-radius: 16px;
    padding: 16px;
    flex-direction: column;
    gap: 14px;
  }

  .mega-trigger:hover .mega-panel,
  .mega-trigger.open .mega-panel {
    display: flex;
  }

  .mega-sidebar {
    width: 100%;
    flex: none;
  }

  .mega-banner {
    min-height: 120px;
  }

  .article-header {
    padding: 118px 0 130px;
  }

  .article-surface {
    margin-top: -60px;
  }

  .article-surface .container {
    padding-top: 22px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 38px;
  }
}

@media (max-width: 767px) {
  .site-header .container {
    height: 68px;
  }

  .brand {
    font-size: 18px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    font-size: 18px;
    flex-basis: 40px;
  }

  .brand-text span {
    display: inline;
  }

  .article-header {
    padding: 102px 0 120px;
    margin-top: 68px;
  }

  .article-header-content h1 {
    font-size: 32px;
  }

  .breadcrumb {
    font-size: 13px;
    margin-bottom: 18px;
  }

  .article-surface {
    border-radius: 24px 24px 0 0;
    padding-bottom: 64px;
  }

  .article-paper {
    padding: 34px 24px 42px;
    margin-top: 36px;
    border-radius: 18px;
  }

  .article-paper p,
  .article-paper li {
    font-size: 16px;
    line-height: 1.9;
  }

  .article-paper h2 {
    font-size: 23px;
    margin-top: 36px;
  }

  .article-paper h3 {
    font-size: 19px;
  }

  .article-return {
    margin-top: 28px;
  }

  .recommend-section {
    margin-top: 44px;
  }

  .recommend-grid {
    grid-template-columns: 1fr;
  }

  .section-heading h2 {
    font-size: 21px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .site-footer {
    padding-top: 56px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand {
    font-size: 17px;
    gap: 9px;
  }

  .brand-text {
    white-space: normal;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 16px;
    flex-basis: 36px;
  }

  .header-actions {
    gap: 8px;
  }

  .article-header {
    padding: 92px 0 104px;
  }

  .article-title {
    font-size: 28px;
  }

  .article-meta {
    font-size: 13px;
    gap: 10px 18px;
  }

  .article-surface .container {
    padding-top: 12px;
  }

  .article-paper {
    padding: 28px 18px 34px;
    border-radius: 16px;
  }

  .article-paper blockquote {
    padding: 18px 20px;
  }

  .recommend-card {
    padding: 18px;
  }

  .mega-links {
    grid-template-columns: 1fr;
  }

  .mega-empty-item {
    grid-column: auto;
  }

  .footer-info-list li {
    font-size: 13px;
  }

  .article-missing {
    padding: 52px 20px;
  }
}

/* roulang page: category2 */
:root {
  --bg-deep: #0A1424;
  --bg-lift: #0F1D33;
  --bg-card: rgba(255,255,255,.04);
  --bg-card-hover: rgba(255,255,255,.07);
  --line: rgba(255,255,255,.10);
  --blue: #1D6FF2;
  --cyan: #22D3EE;
  --violet: #7C8CFF;
  --text-hi: #F2F7FF;
  --text-body: #C7D4E4;
  --text-weak: #8296AE;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(0,0,0,.28);
  --family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-body);
  font-family: var(--family);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body.nav-open {
  overflow: hidden;
}
body.nav-open .nav-wrap {
  max-height: 86vh;
  overflow-y: auto;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
body.nav-open .mega-trigger .mega-panel {
  position: static;
  width: 100%;
  margin-top: 12px;
  transform: none;
  border-radius: 16px;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: 0;
}
ul, ol, p, h1, h2, h3, h4 {
  margin: 0;
  padding: 0;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.container-sm {
  max-width: 900px;
}
.section-title {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.3;
  font-weight: 700;
  color: #142846;
}
.section-light .section-title {
  color: #14233F;
}
.section-deep {
  background: var(--bg-deep);
  padding: 96px 0;
}
.section-deep .section-title {
  color: var(--text-hi);
}
.section-light {
  background: #EFF5FB;
  color: #33455B;
  padding: 92px 0;
}
.section-lift {
  background: #E7F0FA;
  padding: 88px 0;
}
.section-head {
  margin-bottom: 48px;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #0E9EC2;
  background: rgba(29,111,242,.08);
  border: 1px solid rgba(29,111,242,.16);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .03em;
  margin-bottom: 18px;
}
.section-light .section-label {
  color: #0B6E86;
}
.section-desc {
  max-width: 760px;
  font-size: 17px;
  line-height: 1.9;
  margin-top: 12px;
}
/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn i {
  font-size: 14px;
}
.btn-primary {
  background: linear-gradient(135deg, #1D6FF2 0%, #22D3EE 100%);
  color: #061120;
  box-shadow: 0 0 0 1px rgba(34,211,238,.25), 0 10px 28px rgba(29,111,242,.24);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(34,211,238,.4), 0 14px 34px rgba(29,111,242,.34);
}
.btn-ghost {
  background: rgba(255,255,255,.05);
  border-color: rgba(255,255,255,.14);
  color: #EAF2FF;
}
.btn-ghost:hover {
  border-color: var(--cyan);
  color: #fff;
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  border-color: #D9E5F2;
  color: #183150;
}
.btn-light:hover {
  border-color: #1D6FF2;
  color: #1D6FF2;
  transform: translateY(-2px);
}
.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
  border-radius: 10px;
}
/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,20,36,.88);
  border-bottom: 1px solid rgba(255,255,255,.07);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1D6FF2, #22D3EE);
  color: #06121F;
  font-size: 20px;
  box-shadow: 0 0 14px rgba(29,111,242,.4);
}
.brand-text {
  color: #F2F7FF;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}
.brand-text span {
  color: #22D3EE;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}
.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  list-style: none;
  gap: 4px;
}
.nav-links > li {
  position: relative;
}
.nav-links > li > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  color: #C7D4E4;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  position: relative;
  transition: color .2s ease, background .2s ease;
}
.nav-links > li > a:hover {
  color: #fff;
  background: rgba(255,255,255,.04);
}
.nav-links > li > a.active {
  color: #fff;
  background: rgba(34,211,238,.1);
}
.nav-links > li > a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(34,211,238,.6);
}
.nav-links .nav-arrow {
  font-size: 11px;
  transition: transform .2s;
}
.header-cta {
  flex-shrink: 0;
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.14);
  color: #EAF2FF;
  font-size: 18px;
  flex-shrink: 0;
}
.menu-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
/* mega menu */
.mega-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 640px;
  background: rgba(11,24,42,.96);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(0,0,0,.44);
  display: grid;
  grid-template-columns: minmax(0,1fr) 210px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  overflow: hidden;
  backdrop-filter: blur(18px);
}
.mega-trigger:hover .mega-panel,
.site-header.mega-open .mega-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.mega-panel-grid {
  padding: 22px;
}
.mega-panel-title {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-weak);
  font-weight: 600;
  margin-bottom: 12px;
}
.mega-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mega-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: transparent;
  transition: background .2s, transform .2s;
}
.mega-item:hover {
  background: rgba(255,255,255,.06);
  transform: translateX(3px);
}
.mega-item-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(29,111,242,.12);
  color: #7FBEFF;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 15px;
  margin-top: 2px;
}
.mega-item-content h4 {
  color: #EAF2FF;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}
.mega-item-content p {
  color: #8296AE;
  font-size: 13px;
  line-height: 1.6;
  margin-top: 2px;
}
.mega-empty-item {
  padding: 14px 12px;
  color: #8296AE;
  font-size: 14px;
  border: 1px dashed rgba(255,255,255,.12);
  border-radius: 14px;
}
.mega-sidebar {
  border-left: 1px solid rgba(255,255,255,.08);
}
.mega-banner {
  height: 100%;
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  padding: 18px;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  background-size: cover;
  background-position: center;
  border-radius: 0 19px 19px 0;
  position: relative;
}
.mega-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(6,16,30,.88) 100%);
  border-radius: inherit;
}
.mega-banner span {
  position: relative;
  z-index: 1;
}
/* breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: #8AA3BD;
  margin-bottom: 28px;
}
.breadcrumb a {
  color: #8AA3BD;
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--cyan);
}
.breadcrumb i {
  font-size: 11px;
  color: rgba(255,255,255,.35);
}
/* page lead */
.page-lead {
  background:
    radial-gradient(circle at 78% 18%, rgba(34,211,238,.18), transparent 300px),
    linear-gradient(90deg, rgba(10,20,36,.95) 0%, rgba(10,20,36,.74) 60%, rgba(10,20,36,.74) 100%),
    url('/assets/images/backpic/back-3.webp') center/cover;
  padding: 112px 0 88px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.page-lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .62fr);
  gap: 60px;
  align-items: center;
}
.page-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #7FDFF0;
  font-size: 14px;
  font-weight: 600;
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.16);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.page-lead h1 {
  color: #F5F9FF;
  font-size: clamp(36px, 4.6vw, 60px);
  line-height: 1.28;
  font-weight: 700;
  max-width: 760px;
  margin-bottom: 22px;
}
.page-lead-text {
  color: #B9CADD;
  font-size: 18px;
  line-height: 1.9;
  max-width: 700px;
}
.lead-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.lead-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 22px;
  padding: 28px 26px;
  backdrop-filter: blur(16px);
}
.lead-card::before {
  content: "";
  display: block;
  height: 1px;
  border-radius: 8px;
  background: linear-gradient(90deg, rgba(34,211,238,.8), transparent);
  margin-bottom: 20px;
}
.lead-card-title {
  color: #EAF2FF;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}
.lead-card-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  list-style: none;
}
.lead-card-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.lead-card-list i {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(34,211,238,.1);
  color: #22D3EE;
  font-size: 13px;
  display: grid;
  place-items: center;
  margin-top: 5px;
}
.lead-card-list strong {
  display: block;
  color: #DCE8F5;
  font-weight: 600;
  line-height: 1.5;
}
.lead-card-list span {
  color: #8296AE;
  font-size: 14px;
  line-height: 1.6;
}
/* info strip */
.info-strip {
  background: #0C1728;
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 32px 0;
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.info-item {
  display: flex;
  align-items: center;
  gap: 16px;
}
.info-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(29,111,242,.12);
  color: #62B8FF;
  display: grid;
  place-items: center;
  font-size: 17px;
  flex-shrink: 0;
}
.info-item h3 {
  color: #E9F1FB;
  font-size: 15px;
  font-weight: 600;
}
.info-item p {
  color: #7E93AC;
  font-size: 13px;
  line-height: 1.5;
  margin-top: 2px;
}
/* activity list */
.activity-list {
  display: grid;
  gap: 22px;
}
.activity-item {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 200px;
  background: #FFFFFF;
  border: 1px solid #DCE7F3;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 8px 22px rgba(22,38,58,.05);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.activity-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 42px rgba(20,35,60,.10);
  border-color: #BFD9F0;
}
.activity-thumb {
  overflow: hidden;
  background: #EAF1F9;
  min-height: 210px;
}
.activity-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.activity-item:hover .activity-thumb img {
  transform: scale(1.04);
}
.activity-main {
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.activity-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  background: rgba(34,211,238,.1);
  color: #0D7A9B;
}
.status-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22D3EE;
  box-shadow: 0 0 8px rgba(34,211,238,.6);
}
.time-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #8195AA;
  font-size: 13px;
}
.activity-main h3 {
  color: #18304A;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
}
.activity-main p {
  color: #526980;
  font-size: 15px;
  line-height: 1.85;
}
.activity-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
  padding-top: 10px;
}
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #1D6FF2;
  font-weight: 600;
  font-size: 14px;
  transition: gap .2s ease, color .2s ease;
}
.arrow-link:hover {
  color: #0B56C4;
  gap: 12px;
}
.activity-side {
  padding: 22px;
  border-left: 1px solid #EDF2F8;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  background: #F8FBFE;
}
.activity-side .side-box {
  border-top: 1px solid #E2EAF3;
  padding-top: 16px;
}
.activity-side .side-box span {
  display: block;
  color: #A0B0C0;
  font-size: 12px;
  margin-bottom: 4px;
}
.activity-side .side-box strong {
  color: #244466;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}
/* steps */
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step-card {
  background: #FFFFFF;
  border: 1px solid #DCE8F4;
  border-radius: 22px;
  padding: 32px 30px;
  box-shadow: 0 10px 25px rgba(29,50,84,.05);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  border-color: #B8D4EB;
  box-shadow: 0 18px 36px rgba(26,47,75,.09);
}
.step-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #2B8DAA;
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.step-num::before {
  content: "";
  width: 28px;
  height: 1px;
  background: #7FCDE0;
}
.step-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: #1B344F;
  margin-bottom: 12px;
}
.step-card p {
  color: #556E86;
  line-height: 1.85;
}
.step-card .arrow-link {
  margin-top: 20px;
}
.center-holder {
  margin-top: 42px;
  text-align: center;
}
/* cta band */
.cta-band {
  background:
    linear-gradient(90deg, rgba(6,14,27,.9), rgba(10,24,45,.76)),
    url('/assets/images/backpic/back-1.png') center/cover;
  padding: 82px 0;
  border-top: 1px solid rgba(255,255,255,.05);
  background-attachment: fixed;
}
.cta-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-flex h2 {
  color: #F2F7FF;
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.32;
  margin-bottom: 12px;
}
.cta-flex p {
  color: #A9BDD1;
  font-size: 17px;
  line-height: 1.8;
}
.cta-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex-shrink: 0;
}
/* safety section */
.safety-section {
  background: var(--bg-lift);
  padding: 90px 0;
  border-top: 1px solid rgba(255,255,255,.06);
}
.safety-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.safety-item {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 20px;
  padding: 28px 24px;
  transition: background .2s ease, transform .2s ease, border-color .2s ease;
}
.safety-item:hover {
  background: rgba(255,255,255,.07);
  border-color: rgba(34,211,238,.3);
  transform: translateY(-3px);
}
.safety-item i {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: rgba(124,140,255,.12);
  color: #9AA8FF;
  font-size: 17px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.safety-item h3 {
  color: #EAF2FF;
  font-size: 17px;
  margin-bottom: 10px;
}
.safety-item p {
  color: #869BB2;
  font-size: 14px;
  line-height: 1.8;
}
/* faq + contact */
.faq-contact-section {
  background: var(--bg-deep);
  padding: 96px 0;
}
.faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
  gap: 44px;
  align-items: start;
}
.faq-box {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 24px;
  padding: 28px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 0 22px;
  transition: background .2s ease, border-color .2s ease;
}
.faq-item[open] {
  background: rgba(255,255,255,.06);
  border-color: rgba(34,211,238,.22);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  padding: 18px 0;
  color: #E6F0FC;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  color: #22D3EE;
  transition: transform .2s ease;
  flex-shrink: 0;
  font-size: 14px;
}
.faq-item[open] summary i {
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 0 20px;
  color: #A7BACF;
  font-size: 15px;
  line-height: 1.85;
  border-top: 1px solid rgba(255,255,255,.07);
  margin-top: -4px;
}
.faq-answer p {
  padding-top: 16px;
}
/* contact form */
.contact-box {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 24px;
  padding: 30px;
}
.contact-box .section-label {
  margin-bottom: 16px;
}
.contact-box h3 {
  color: #F2F7FF;
  font-size: 23px;
  line-height: 1.5;
}
.contact-box .form-note {
  color: #8296AE;
  font-size: 14px;
  line-height: 1.8;
  margin-top: 10px;
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  color: #B8C9DA;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 7px;
}
.form-control {
  width: 100%;
  border: 1px solid rgba(255,255,255,.13);
  background: rgba(255,255,255,.04);
  border-radius: 12px;
  padding: 12px 14px;
  color: #EAF2FF;
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.form-control:focus {
  border-color: var(--cyan);
  background: rgba(34,211,238,.05);
  box-shadow: 0 0 0 4px rgba(34,211,238,.12);
}
textarea.form-control {
  resize: vertical;
  min-height: 120px;
}
.form-group select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2389c7d4'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 40px;
}
.form-group select.form-control option {
  background: #10233D;
  color: #EAF2FF;
}
.form-control::placeholder {
  color: #5F7690;
}
.form-tip {
  color: #5F7690;
  font-size: 13px;
  line-height: 1.8;
  margin-top: 18px;
}
/* footer */
.site-footer {
  background: #070D18;
  color: #8FA1B5;
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 76px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 42px;
  padding-bottom: 46px;
}
.footer-brand p {
  color: #7E93AC;
  max-width: 330px;
  font-size: 15px;
  line-height: 1.9;
  margin-top: 18px;
}
.footer-col h4 {
  color: #E2EBF5;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul a {
  color: #8FA1B5;
  font-size: 14px;
  transition: color .2s, transform .2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul a i {
  font-size: 11px;
  color: #4F6B85;
  transition: color .2s;
}
.footer-col ul a:hover {
  color: #22D3EE;
  transform: translateX(4px);
}
.footer-col ul a:hover i {
  color: #22D3EE;
}
.footer-info-list li {
  display: flex;
  gap: 10px;
  color: #8FA1B5;
  font-size: 14px;
  line-height: 1.8;
}
.footer-info-list i {
  color: #5E89B0;
  margin-top: 5px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #6D7E91;
}
.footer-bottom a {
  color: #8FA1B5;
  transition: color .2s;
}
.footer-bottom a:hover {
  color: #22D3EE;
}
/* responsive */
@media (max-width: 1199px) {
  .activity-item {
    grid-template-columns: 220px minmax(0, 1fr);
  }
  .activity-side {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid #ECF2F8;
    flex-direction: row;
    background: #F8FBFE;
    padding: 18px 28px;
  }
  .activity-side .side-box {
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid #E0E9F2;
    padding-left: 22px;
  }
}
@media (max-width: 991px) {
  .menu-toggle {
    display: inline-flex;
  }
  .nav-wrap {
    position: absolute;
    top: 100%;
    left: 16px;
    right: 16px;
    align-items: stretch;
    justify-content: flex-start;
    background: rgba(10,20,36,.98);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 20px;
    padding: 20px;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-8px);
    visibility: hidden;
    transition: opacity .2s ease, transform .2s ease, max-height .2s ease, visibility .2s;
    backdrop-filter: blur(24px);
  }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
  }
  .nav-links > li {
    width: 100%;
  }
  .nav-links > li > a {
    width: 100%;
    justify-content: space-between;
    padding: 14px 12px;
  }
  .nav-links > li > a.active::after {
    display: none;
  }
  .header-cta {
    margin-left: 0;
  }
  .header-inner {
    min-height: 66px;
    flex-wrap: wrap;
  }
  .header-cta {
    display: none;
  }
  .mega-trigger:hover .mega-panel,
  .site-header.mega-open .mega-panel {
    position: static;
    width: 100%;
    transform: none;
    border-radius: 16px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    margin-top: 10px;
  }
  .mega-panel {
    display: none;
    grid-template-columns: 1fr;
  }
  .site-header.mega-open .mega-panel {
    display: grid;
  }
  .mega-sidebar {
    border-left: 0;
    border-top: 1px solid rgba(255,255,255,.08);
  }
  .mega-banner {
    min-height: 150px;
    border-radius: 0 0 16px 16px;
  }
  .page-lead-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }
  .info-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .step-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }
  .cta-flex {
    flex-direction: column;
    align-items: flex-start;
  }
  .safety-grid {
    grid-template-columns: 1fr 1fr;
  }
  .faq-contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  .section-light,
  .section-lift,
  .section-deep,
  .safety-section,
  .faq-contact-section {
    padding: 64px 0;
  }
  .activity-item {
    grid-template-columns: 1fr;
  }
  .activity-thumb {
    min-height: 190px;
    max-height: 240px;
  }
  .activity-side {
    grid-column: auto;
    flex-direction: column;
    padding: 20px 22px;
  }
  .activity-side .side-box {
    border-left: 0;
    border-top: 1px solid #E0EAF2;
    padding-left: 0;
    padding-top: 16px;
  }
  .page-lead {
    padding: 76px 0 60px;
  }
  .cta-band {
    background-attachment: scroll;
    padding: 60px 0;
  }
  .safety-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-bottom: 20px;
  }
}
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 17px;
  }
  .brand-text {
    font-size: 18px;
  }
  .page-lead h1 {
    font-size: 30px;
  }
  .lead-btn-row .btn {
    width: 100%;
  }
  .activity-main {
    padding: 22px 20px;
  }
  .activity-footer {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-sm {
    width: 100%;
  }
  .ck-btn {
    width: 100%;
  }
  .faq-item summary {
    font-size: 15px;
  }
  .faq-box,
  .contact-box {
    padding: 20px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
}