/* roulang page: index */
/* ===== Design Tokens ===== */
:root {
  --bg-primary: #060A18;
  --bg-secondary: #0B1120;
  --bg-alt: #0A0F1E;
  --bg-solid: #0D1428;
  --brand-primary: #00C8FF;
  --brand-secondary: #21E6C1;
  --brand-gold: #F5B84B;
  --text-primary: #E6EDF7;
  --text-secondary: #A0AFC3;
  --text-muted: #5B6B82;
  --text-disabled: #39485E;
  --border-glass: rgba(255,255,255,0.09);
  --border-glass-light: rgba(255,255,255,0.14);
  --gradient-primary: linear-gradient(90deg, #00C8FF 0%, #00E0C6 100%);
  --gradient-hero: linear-gradient(120deg, #FFFFFF 0%, #B7ECFF 100%);
  --gradient-progress: linear-gradient(90deg, #00C8FF, #21E6C1);
  --shadow-card: 0 10px 30px rgba(0,0,0,0.30);
  --shadow-hover: 0 16px 40px rgba(0,200,255,0.10);
  --shadow-btn: 0 0 20px rgba(0,200,255,0.35);
  --shadow-btn-hover: 0 0 32px rgba(0,200,255,0.55);
  --radius-card: 20px;
  --radius-small: 12px;
  --radius-pill: 999px;
  --radius-img: 14px;
  --container-width: 1200px;
  --spacer-section: clamp(64px, 10vw, 120px);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-num: "Rajdhani", "DIN Alternate", "Bahnschrift", sans-serif;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cn);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-primary); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #66DCFF; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: rgba(0,200,255,0.25); color: #fff; }
:focus-visible { outline: 2px dashed rgba(255,255,255,0.7); outline-offset: 3px; }
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 9999;
  background: var(--brand-primary); color: #fff; padding: 10px 20px;
  border-radius: 0 0 12px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ===== Container ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
}

/* ===== Section Common ===== */
.section { padding: var(--spacer-section) 0; position: relative; }
.section--alt { background: var(--bg-alt); }
.section__head { margin-bottom: 48px; text-align: center; position: relative; z-index: 2; }
.section__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: 0.12em; color: var(--brand-secondary);
  background: rgba(33,230,193,0.08); border: 1px solid rgba(33,230,193,0.2);
  padding: 6px 16px; border-radius: var(--radius-pill); margin-bottom: 16px;
  text-transform: uppercase; font-weight: 500;
}
.section__title {
  font-size: clamp(28px, 3.5vw, 40px); font-weight: 700; line-height: 1.25;
  color: var(--text-primary); letter-spacing: -0.01em;
}
.section__desc { color: var(--text-secondary); font-size: 16px; max-width: 640px; margin: 14px auto 0; line-height: 1.8; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; line-height: 1;
  padding: 14px 28px; border-radius: var(--radius-pill);
  transition: all 0.3s ease; white-space: nowrap; border: none;
  min-height: 44px; letter-spacing: 0.01em;
}
.btn--primary {
  background: var(--gradient-primary); color: #041018;
  box-shadow: var(--shadow-btn); font-weight: 700;
}
.btn--primary:hover { color: #041018; box-shadow: var(--shadow-btn-hover); transform: translateY(-2px); }
.btn--primary:active { transform: scale(0.98); box-shadow: 0 0 12px rgba(0,200,255,0.25); }
.btn--primary:disabled { background: var(--text-disabled); color: var(--text-muted); box-shadow: none; transform: none; cursor: not-allowed; }
.btn--secondary {
  background: transparent; color: var(--brand-primary);
  border: 1px solid rgba(0,200,255,0.5);
}
.btn--secondary:hover { background: rgba(0,200,255,0.08); color: #66DCFF; border-color: var(--brand-primary); transform: translateY(-2px); }
.btn--secondary:active { transform: scale(0.98); }
.btn--secondary:disabled { border-color: var(--text-disabled); color: var(--text-muted); cursor: not-allowed; }
.btn--ghost { background: transparent; color: var(--text-secondary); padding: 10px 16px; }
.btn--ghost:hover { color: var(--brand-primary); text-decoration: underline; }
.btn--sm { padding: 10px 20px; font-size: 14px; min-height: 40px; }
.btn--lg { padding: 18px 42px; font-size: 17px; min-height: 52px; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 68px; background: rgba(6,10,24,0.8);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled { background: rgba(6,10,24,0.95); box-shadow: 0 4px 30px rgba(0,0,0,0.4); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo__icon { width: 36px; height: 36px; flex-shrink: 0; }
.logo__text {
  font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 0.02em;
  white-space: nowrap; background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: center; }
.nav-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.08); background: transparent;
  transition: all 0.3s ease; white-space: nowrap; line-height: 1.2;
}
.nav-chip:hover { color: var(--text-primary); border-color: rgba(0,200,255,0.35); background: rgba(0,200,255,0.06); }
.nav-chip.active {
  background: var(--gradient-primary); color: #041018; font-weight: 700;
  border-color: transparent; box-shadow: 0 0 16px rgba(0,200,255,0.4);
}
.nav-chip.active:hover { color: #041018; }
.header__actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

/* Nav Toggle */
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 10px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.3s ease; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Drawer */
.drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); z-index: 101; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
.drawer-overlay.is-visible { opacity: 1; visibility: visible; }
.mobile-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 102;
  width: min(320px, 80vw); background: var(--bg-secondary);
  border-left: 1px solid rgba(255,255,255,0.08);
  transform: translateX(100%); transition: transform 0.35s cubic-bezier(0.22,1,0.36,1);
  display: flex; flex-direction: column; padding: 24px; gap: 8px;
  box-shadow: -20px 0 60px rgba(0,0,0,0.4);
}
.mobile-drawer.is-open { transform: translateX(0); }
.drawer__cta { margin-bottom: 20px; width: 100%; }
.drawer__link {
  display: block; padding: 14px 16px; font-size: 16px; font-weight: 500;
  color: var(--text-secondary); border-radius: var(--radius-small);
  border: 1px solid rgba(255,255,255,0.06); margin-bottom: 6px;
  transition: all 0.2s ease;
}
.drawer__link:hover { color: var(--text-primary); background: rgba(255,255,255,0.04); border-color: rgba(0,200,255,0.3); }
.drawer__link.active { color: var(--brand-primary); background: rgba(0,200,255,0.08); border-color: rgba(0,200,255,0.3); font-weight: 600; }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  padding: 140px 0 80px; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(6,10,24,0.94) 0%, rgba(6,10,24,0.72) 50%, rgba(6,10,24,0.30) 100%);
  z-index: 1;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 75% 60%, rgba(0,200,255,0.10) 0%, transparent 60%);
  z-index: 1;
}
.hero__inner { position: relative; z-index: 3; width: 100%; }
.hero__content { max-width: 640px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,184,75,0.10); border: 1px solid rgba(245,184,75,0.35);
  color: var(--brand-gold); font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: var(--radius-pill); margin-bottom: 22px;
  letter-spacing: 0.04em;
}
.hero__title {
  font-size: clamp(40px, 6vw, 72px); font-weight: 800; line-height: 1.1;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 22px; letter-spacing: -0.02em;
}
.hero__subtitle {
  font-size: clamp(16px, 2vw, 18px); color: var(--text-secondary);
  max-width: 460px; margin-bottom: 36px; line-height: 1.7;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 56px; }
.hero__stats {
  display: flex; flex-wrap: wrap; gap: 32px; padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.10);
}
.hero__stat { display: flex; flex-direction: column; gap: 2px; }
.hero__stat-num {
  font-family: var(--font-num); font-size: 28px; font-weight: 700;
  color: #fff; line-height: 1.2;
}
.hero__stat-num em { font-style: normal; color: var(--brand-gold); }
.hero__stat-label { font-size: 13px; color: var(--text-muted); }
.hero__scroll {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  z-index: 3; display: flex; flex-direction: column; align-items: center;
  gap: 6px; color: var(--text-muted); font-size: 13px;
  transition: color 0.3s ease;
}
.hero__scroll:hover { color: var(--brand-primary); }
.hero__scroll-arrow { width: 22px; height: 22px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg); animation: scrollDown 1.8s ease-in-out infinite; }
@keyframes scrollDown { 0%, 100% { transform: rotate(45deg) translateY(0); } 50% { transform: rotate(45deg) translateY(6px); } }

/* ===== Gameplay Section ===== */
.gameplay {
  background: var(--bg-primary);
  position: relative;
}
.gameplay__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
  max-width: 960px; margin: 0 auto; position: relative; z-index: 2;
}
.gameplay__card {
  background: rgba(255,255,255,0.045);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card); padding: 32px;
  transition: all 0.4s ease; position: relative; overflow: hidden;
  box-shadow: var(--shadow-card);
}
.gameplay__card:nth-child(even) { margin-top: 36px; }
.gameplay__card:nth-child(3) { margin-top: 0; }
.gameplay__card:hover {
  transform: translateY(-4px); border-color: rgba(0,200,255,0.4);
  box-shadow: var(--shadow-hover); background: rgba(255,255,255,0.06);
}
.gameplay__card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-primary); opacity: 0; transition: opacity 0.3s ease;
  border-radius: 3px 3px 0 0;
}
.gameplay__card:hover::before { opacity: 1; }
.gameplay__card-top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.gameplay__icon {
  width: 52px; height: 52px; border-radius: 14px; flex-shrink: 0;
  background: rgba(0,200,255,0.12); display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(0,200,255,0.2); color: var(--brand-primary);
}
.gameplay__num {
  font-family: var(--font-num); font-size: 36px; font-weight: 700;
  color: rgba(255,255,255,0.12); margin-left: auto; line-height: 1;
}
.gameplay__card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; color: var(--text-primary); }
.gameplay__card p { color: var(--text-secondary); font-size: 15px; line-height: 1.75; margin-bottom: 16px; }
.gameplay__more { font-size: 14px; color: var(--brand-primary); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: gap 0.3s ease; }
.gameplay__more:hover { gap: 8px; color: #66DCFF; }

/* ===== Rewards Section ===== */
.rewards { background: var(--bg-alt); position: relative; }
.rewards__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
  max-width: 1000px; margin: 0 auto;
}
.reward-card {
  border-radius: var(--radius-card); overflow: hidden;
  background: var(--bg-solid); border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-card); transition: all 0.4s ease; position: relative;
}
.reward-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(0,200,255,0.3); }
.reward-card--main { grid-row: span 2; display: flex; flex-direction: column; }
.reward-card--main .reward-card__body { flex: 1; display: flex; flex-direction: column; justify-content: center; padding: 36px; }
.reward-card__cover { overflow: hidden; position: relative; }
.reward-card--main .reward-card__cover { min-height: 220px; }
.reward-card__cover-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.reward-card:hover .reward-card__cover-img { transform: scale(1.04); }
.reward-card__cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(6,10,24,0.75) 100%); }
.reward-card__badge {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  background: rgba(245,184,75,0.15); border: 1px solid rgba(245,184,75,0.4);
  color: var(--brand-gold); font-size: 12px; font-weight: 600;
  padding: 4px 12px; border-radius: var(--radius-pill);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.reward-card__body { padding: 24px; }
.reward-card__title { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); display: flex; align-items: center; gap: 8px; }
.reward-card__desc { font-size: 15px; color: var(--text-secondary); line-height: 1.7; }
.reward-card__value {
  font-family: var(--font-num); font-size: 40px; font-weight: 700;
  color: var(--brand-gold); margin-top: 16px; line-height: 1.1;
}
.reward-card__value span { font-size: 16px; font-weight: 500; color: var(--text-muted); margin-left: 4px; }

/* ===== Progress Section ===== */
.progress-section { background: var(--bg-primary); }
.progress__wrap {
  max-width: 900px; margin: 0 auto; background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-card);
  padding: clamp(32px, 5vw, 56px); backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); box-shadow: var(--shadow-card);
}
.progress__bar { display: flex; align-items: flex-start; justify-content: space-between; position: relative; padding: 20px 0 40px; }
.progress__bar::before {
  content: ''; position: absolute; top: 46px; left: 10%; right: 10%; height: 4px;
  background: rgba(255,255,255,0.08); border-radius: 4px;
}
.progress__bar::after {
  content: ''; position: absolute; top: 46px; left: 10%; height: 4px; width: 40%;
  background: var(--gradient-progress); border-radius: 4px; box-shadow: 0 0 12px rgba(33,230,193,0.4);
}
.progress__step { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; flex: 1; text-align: center; }
.progress__dot {
  width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--bg-solid); border: 3px solid rgba(255,255,255,0.12);
  color: var(--text-muted); margin-bottom: 12px; font-size: 20px; font-weight: 700;
  transition: all 0.3s ease; position: relative; z-index: 2;
}
.progress__step--done .progress__dot { background: var(--gradient-progress); color: #041018; border-color: transparent; box-shadow: 0 0 16px rgba(33,230,193,0.4); }
.progress__step--current .progress__dot { border-color: var(--brand-primary); color: var(--brand-primary); box-shadow: 0 0 0 5px rgba(0,200,255,0.15), 0 0 20px rgba(0,200,255,0.4); background: rgba(0,200,255,0.08); }
.progress__step--locked .progress__dot { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.08); color: var(--text-disabled); }
.progress__step-name { font-size: 15px; font-weight: 500; color: var(--text-primary); margin-bottom: 4px; }
.progress__step-desc { font-size: 13px; color: var(--text-muted); }
.progress__cta { text-align: center; margin-top: 32px; }

/* ===== News Section ===== */
.news-section { background: var(--bg-alt); }
.news__grid {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 32px;
  max-width: 1080px; margin: 0 auto; align-items: stretch;
}
.news-feature { border-radius: var(--radius-card); overflow: hidden; background: var(--bg-solid); border: 1px solid rgba(255,255,255,0.08); box-shadow: var(--shadow-card); transition: all 0.4s ease; }
.news-feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(0,200,255,0.3); }
.news-feature__cover { overflow: hidden; aspect-ratio: 16 / 9; position: relative; }
.news-feature__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-feature:hover .news-feature__cover img { transform: scale(1.03); }
.news-feature__cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(6,10,24,0.7) 100%); }
.news-feature__body { padding: 24px 28px 28px; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(0,200,255,0.12); color: var(--brand-primary);
  font-size: 12px; font-weight: 600; padding: 3px 12px;
  border-radius: var(--radius-pill); line-height: 1.5; letter-spacing: 0.02em;
}
.tag--gold { background: rgba(245,184,75,0.12); color: var(--brand-gold); }
.tag--green { background: rgba(33,230,193,0.12); color: var(--brand-secondary); }
.news-meta time { font-size: 13px; color: var(--text-muted); }
.news-feature__title { font-size: 22px; font-weight: 600; line-height: 1.4; margin-bottom: 10px; color: var(--text-primary); }
.news-feature__title:hover { color: var(--brand-primary); }
.news-feature__excerpt { font-size: 15px; color: var(--text-secondary); line-height: 1.7; }
.news-list { display: flex; flex-direction: column; gap: 12px; }
.news-list__item {
  display: flex; gap: 16px; padding: 14px 16px; border-radius: var(--radius-small);
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05);
  transition: all 0.3s ease; align-items: center; min-height: 72px;
}
.news-list__item:hover { background: rgba(255,255,255,0.06); border-color: rgba(0,200,255,0.25); }
.news-list__thumb { width: 68px; height: 64px; border-radius: 10px; overflow: hidden; flex-shrink: 0; }
.news-list__thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-list__content { flex: 1; min-width: 0; }
.news-list__content h4 { font-size: 15px; font-weight: 500; color: var(--text-primary); line-height: 1.4; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-list__content h4:hover { color: var(--brand-primary); }
.news-list__content p { font-size: 13px; color: var(--text-muted); line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-list__meta { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.news-list__meta time { font-size: 12px; color: var(--text-muted); }
.tag--small { font-size: 11px; padding: 2px 8px; }
.news__more { text-align: right; margin-top: 28px; }
.news__more a { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--brand-primary); }
.news__more a:hover { gap: 10px; color: #66DCFF; }
.news-empty {
  text-align: center; padding: 60px 20px; border: 1px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius-card); background: rgba(255,255,255,0.02);
  grid-column: 1 / -1;
}
.news-empty__icon { width: 72px; height: 72px; margin: 0 auto 16px; opacity: 0.5; }
.news-empty p { color: var(--text-secondary); font-size: 16px; }

/* ===== FAQ Section ===== */
.faq-section { background: var(--bg-primary); }
.faq__list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq__item {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-small); overflow: hidden; transition: all 0.3s ease;
}
.faq__item:hover { border-color: rgba(0,200,255,0.2); }
.faq__item.is-open { border-color: rgba(0,200,255,0.35); background: rgba(0,200,255,0.04); }
.faq__question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--text-primary);
  background: none; border: none; text-align: left; gap: 16px; min-height: 56px;
  transition: color 0.2s ease;
}
.faq__question:hover { color: var(--brand-primary); }
.faq__icon {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15); display: flex; align-items: center; justify-content: center;
  transition: all 0.3s ease; position: relative; color: var(--text-secondary);
}
.faq__icon::before { content: ''; width: 10px; height: 2px; background: currentColor; position: absolute; border-radius: 1px; }
.faq__icon::after { content: ''; width: 2px; height: 10px; background: currentColor; position: absolute; border-radius: 1px; transition: transform 0.3s ease; }
.faq__item.is-open .faq__icon { border-color: var(--brand-primary); color: var(--brand-primary); transform: rotate(45deg); }
.faq__answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq__answer-inner { padding: 0 24px 22px; color: var(--text-secondary); font-size: 15px; line-height: 1.75; }

/* ===== CTA Banner ===== */
.cta-banner {
  position: relative; padding: clamp(60px, 8vw, 100px) 0; text-align: center;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6,10,24,0.9) 0%, rgba(6,10,24,0.8) 100%);
}
.cta-banner::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,200,255,0.12) 0%, transparent 70%);
}
.cta-banner__inner { position: relative; z-index: 2; max-width: 760px; margin: 0 auto; }
.cta-banner__title { font-size: clamp(28px, 4vw, 42px); font-weight: 700; color: #fff; margin-bottom: 18px; line-height: 1.3; }
.cta-banner__sub { color: var(--text-secondary); font-size: 16px; margin-bottom: 36px; line-height: 1.7; }
.cta-banner__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: #04070F; padding: 64px 0 24px; border-top: 1px solid rgba(255,255,255,0.04); }
.footer__top { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; margin-bottom: 48px; }
.footer__brand { max-width: 340px; }
.footer__logo { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer__logo .logo__text { font-size: 22px; }
.footer__desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.footer__links-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer__links-title { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 14px; letter-spacing: 0.05em; }
.footer__links-list { display: flex; flex-direction: column; gap: 10px; }
.footer__links-list a { font-size: 14px; color: var(--text-muted); transition: color 0.2s ease; }
.footer__links-list a:hover { color: var(--brand-primary); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer__copyright { font-size: 13px; color: var(--text-muted); }
.footer__icp { font-size: 13px; color: var(--text-muted); }
.footer__friends { margin-top: 16px; font-size: 13px; color: var(--text-muted); display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; }
.footer__friends a { color: var(--text-muted); transition: color 0.2s ease; }
.footer__friends a:hover { color: var(--brand-primary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav { gap: 4px; }
  .nav-chip { padding: 8px 14px; font-size: 13px; }
  .header__cta { display: none; }
  .news__grid { grid-template-columns: 1fr; }
  .rewards__grid { grid-template-columns: 1fr; }
  .reward-card--main { grid-row: auto; }
  .progress__bar { overflow-x: auto; padding-bottom: 20px; }
  .progress__bar::before, .progress__bar::after { display: none; }
  .progress__step { min-width: 140px; }
  .hero { min-height: auto; padding: 120px 0 60px; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .header__cta { display: none; }
  .gameplay__grid { grid-template-columns: 1fr; }
  .gameplay__card:nth-child(even), .gameplay__card:nth-child(3) { margin-top: 0; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .footer__links-wrap { grid-template-columns: repeat(2, 1fr); }
  .hero__stats { gap: 20px; }
  .hero__actions .btn { flex: 1 1 100%; }
  .cta-banner__actions .btn { flex: 1 1 100%; }
  .btn--lg { padding: 16px 28px; }
  .progress__steps-wrap { overflow-x: auto; }
  .section__title { font-size: 26px; }
  .news-list__content p { display: none; }
  .news-list__thumb { width: 52px; height: 50px; }
}

@media (max-width: 520px) {
  .site-header { height: 60px; }
  .header__inner { height: 60px; }
  .logo__text { font-size: 17px; }
  .logo__icon { width: 32px; height: 32px; }
  .hero { padding: 100px 0 50px; }
  .hero__title { font-size: 36px; }
  .hero__actions { gap: 12px; }
  .hero__stat-num { font-size: 22px; }
  .hero__stats { gap: 14px; }
  .footer__links-wrap { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .reward-card__value { font-size: 32px; }
  .gameplay__card { padding: 24px; }
  .progress__wrap { padding: 24px 16px; }
  .news-feature__body { padding: 20px; }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero__content { animation: fadeInUp 0.8s ease-out; }

/* roulang page: article */
:root {
            --bg-primary: #060A18;
            --bg-secondary: #0B1120;
            --bg-tertiary: #0D1428;
            --bg-deep: #04070F;
            --brand: #00C8FF;
            --brand-soft: rgba(0, 200, 255, 0.12);
            --brand-secondary: #21E6C1;
            --accent: #F5B84B;
            --text-primary: #E6EDF7;
            --text-secondary: #A0AFC3;
            --text-weak: #5B6B82;
            --text-disabled: #39485E;
            --border: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.14);
            --border-brand: rgba(0, 200, 255, 0.4);
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-full: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.30);
            --shadow-hover: 0 16px 40px rgba(0, 200, 255, 0.10);
            --shadow-btn: 0 0 20px rgba(0, 200, 255, 0.35);
            --shadow-btn-hover: 0 0 32px rgba(0, 200, 255, 0.55);
            --gradient-primary: linear-gradient(90deg, #00C8FF 0%, #00E0C6 100%);
            --gradient-title: linear-gradient(120deg, #FFFFFF 0%, #B7ECFF 100%);
            --gradient-progress: linear-gradient(90deg, #00C8FF, #21E6C1);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
            --font-num: "Rajdhani", "DIN Alternate", "Bahnschrift", sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --header-h: 68px;
            --container-w: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.6;
            padding-top: var(--header-h);
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: #fff;
        }

        a:focus-visible {
            outline: 2px dashed rgba(255, 255, 255, 0.8);
            outline-offset: 2px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible {
            outline: 2px dashed rgba(255, 255, 255, 0.8);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding-left: clamp(16px, 4vw, 40px);
            padding-right: clamp(16px, 4vw, 40px);
        }

        .container--narrow {
            max-width: 840px;
            margin: 0 auto;
            padding-left: clamp(16px, 4vw, 40px);
            padding-right: clamp(16px, 4vw, 40px);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-full);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            font-family: var(--font-cn);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn:active {
            transform: scale(0.98);
        }

        .btn:focus-visible {
            outline: 2px dashed rgba(255, 255, 255, 0.8);
            outline-offset: 3px;
        }

        .btn--primary {
            background: var(--gradient-primary);
            color: #061018;
            box-shadow: var(--shadow-btn);
        }

        .btn--primary:hover {
            box-shadow: var(--shadow-btn-hover);
            filter: brightness(1.08);
            color: #061018;
        }

        .btn--secondary {
            background: transparent;
            border-color: rgba(0, 200, 255, 0.5);
            color: var(--brand);
        }

        .btn--secondary:hover {
            background: rgba(0, 200, 255, 0.08);
            border-color: var(--brand);
            color: var(--brand);
        }

        .btn--ghost {
            background: transparent;
            color: var(--text-secondary);
            padding: 12px 16px;
        }

        .btn--ghost:hover {
            color: var(--brand);
            background: rgba(0, 200, 255, 0.04);
        }

        .btn--sm {
            min-height: 40px;
            padding: 8px 22px;
            font-size: 14px;
        }

        .btn[disabled] {
            background: var(--text-disabled);
            color: var(--text-weak);
            box-shadow: none;
            cursor: not-allowed;
            filter: none;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 500;
            background: var(--brand-soft);
            color: var(--brand);
            letter-spacing: 0.03em;
            line-height: 1.4;
        }

        .badge--accent {
            background: rgba(245, 184, 75, 0.12);
            color: var(--accent);
        }

        .badge--green {
            background: rgba(33, 230, 193, 0.12);
            color: var(--brand-secondary);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: var(--header-h);
            background: rgba(6, 10, 24, 0.8);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .logo__icon {
            width: 34px;
            height: 34px;
        }

        .logo__text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-chip {
            display: inline-flex;
            align-items: center;
            min-height: 40px;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            background: transparent;
            white-space: nowrap;
        }

        .nav-chip:hover {
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.03);
        }

        .nav-chip.active {
            background: var(--gradient-primary);
            color: #061018;
            border-color: transparent;
            font-weight: 600;
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.35);
        }

        .header__actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            align-items: center;
            background: transparent;
            transition: border-color var(--transition);
        }

        .nav-toggle:hover {
            border-color: rgba(0, 200, 255, 0.5);
        }

        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--text-primary);
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: 22px 0 12px;
        }

        .breadcrumb__inner {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
        }

        .breadcrumb__sep {
            color: var(--text-disabled);
            font-size: 16px;
            line-height: 1;
        }

        .breadcrumb__current {
            color: var(--text-secondary);
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* Article Header */
        .article-header {
            background: linear-gradient(rgba(6, 10, 24, 0.88), rgba(6, 10, 24, 0.96)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            padding: 56px 0 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .article-header__inner {
            max-width: 840px;
            margin: 0 auto;
        }

        .article-header__cat {
            display: inline-flex;
            margin-bottom: 18px;
        }

        .article-header h1 {
            font-size: clamp(32px, 4.5vw, 44px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.01em;
            margin-bottom: 20px;
            background: var(--gradient-title);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            word-break: break-word;
        }

        .article-header__meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 24px;
        }

        .article-header__meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-header__excerpt {
            padding: 18px 22px;
            border-left: 3px solid rgba(0, 200, 255, 0.5);
            background: rgba(0, 200, 255, 0.05);
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            letter-spacing: 0.02em;
        }

        /* Article Body */
        .article-body {
            padding: 40px 0 64px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
            letter-spacing: 0.015em;
            word-wrap: break-word;
        }

        .article-content > * + * {
            margin-top: 1.2em;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            margin: 2em 0 0.8em;
            padding-left: 16px;
            border-left: 4px solid var(--brand);
            color: var(--text-primary);
        }

        .article-content h2:first-child {
            margin-top: 0;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.45;
            margin: 1.6em 0 0.6em;
            color: var(--text-primary);
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            margin: 1.4em 0 0.4em;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.2em;
            color: var(--text-primary);
        }

        .article-content ul {
            margin: 1em 0 1.2em;
            padding-left: 4px;
            list-style: none;
        }

        .article-content ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 11px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 8px rgba(0, 200, 255, 0.6);
        }

        .article-content ol {
            margin: 1em 0 1.2em;
            padding-left: 28px;
            list-style: decimal;
        }

        .article-content ol li {
            margin-bottom: 8px;
            padding-left: 4px;
            line-height: 1.7;
        }

        .article-content ol li::marker {
            color: var(--brand);
            font-weight: 600;
        }

        .article-content blockquote {
            margin: 1.8em 0;
            padding: 20px 24px;
            border-left: 4px solid rgba(0, 200, 255, 0.6);
            background: rgba(0, 200, 255, 0.05);
            border-radius: 0 14px 14px 0;
            color: var(--text-secondary);
            font-style: normal;
            line-height: 1.75;
        }

        .article-content blockquote p {
            margin-bottom: 0;
            color: var(--text-secondary);
        }

        .article-content code {
            background: rgba(0, 200, 255, 0.08);
            color: var(--brand-secondary);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        }

        .article-content pre {
            background: var(--bg-tertiary);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 14px;
            padding: 20px 24px;
            overflow-x: auto;
            margin: 1.8em 0;
            line-height: 1.6;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--text-primary);
            font-size: 14px;
        }

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            margin: 1.5em 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 15px;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-content table thead {
            background: rgba(0, 200, 255, 0.1);
        }

        .article-content table th {
            padding: 14px 18px;
            font-weight: 600;
            text-align: left;
            color: var(--text-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .article-content table td {
            padding: 12px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
        }

        .article-content table tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        .article-content table tr:last-child td {
            border-bottom: none;
        }

        .article-content a {
            color: var(--brand);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--brand-secondary);
        }

        .article-content hr {
            border: none;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            margin: 2em 0;
        }

        /* Empty State */
        .article-empty {
            text-align: center;
            padding: 80px 20px;
        }

        .article-empty svg {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            color: var(--text-disabled);
        }

        .article-empty p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* Related */
        .article-related {
            padding: 64px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            background: var(--bg-secondary);
        }

        .article-related__header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 36px;
            gap: 20px;
            flex-wrap: wrap;
        }

        .article-related__header h2 {
            font-size: clamp(28px, 3vw, 36px);
            font-weight: 700;
            background: var(--gradient-title);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: rgba(255, 255, 255, 0.05);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-brand);
            box-shadow: var(--shadow-hover);
        }

        .related-card__cover {
            aspect-ratio: 4 / 3;
            overflow: hidden;
        }

        .related-card__cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .related-card:hover .related-card__cover img {
            transform: scale(1.04);
        }

        .related-card__body {
            padding: 18px 20px 20px;
        }

        .related-card__title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 48px;
            transition: color var(--transition);
        }

        .related-card:hover .related-card__title {
            color: var(--brand);
        }

        .related-card__meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Article Back */
        .article-back {
            padding: 48px 0 80px;
        }

        .article-back__inner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: auto;
            padding: 60px 0 0;
        }

        .footer__top {
            display: grid;
            grid-template-columns: 4fr 8fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer__brand .footer__logo {
            margin-bottom: 16px;
        }

        .footer__desc {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
        }

        .footer__links-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .footer__links-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer__links-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer__links-list a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer__links-list a:hover {
            color: var(--brand);
        }

        .footer__friends {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 16px;
            padding: 24px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer__friends a {
            color: var(--text-weak);
            font-size: 13px;
        }

        .footer__friends a:hover {
            color: var(--brand);
        }

        .footer__bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0 28px;
            color: var(--text-weak);
            font-size: 13px;
        }

        .footer__copyright,
        .footer__icp {
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer__top {
                grid-template-columns: 1fr;
            }

            .footer__links-wrap {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: var(--header-h);
                right: 0;
                width: min(320px, 80vw);
                height: calc(100vh - var(--header-h));
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                background: rgba(6, 10, 24, 0.97);
                -webkit-backdrop-filter: blur(20px);
                backdrop-filter: blur(20px);
                border-left: 1px solid rgba(255, 255, 255, 0.08);
                padding: 24px 20px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
                overflow-y: auto;
                z-index: 99;
            }

            .main-nav.open {
                transform: translateX(0);
            }

            .nav-chip {
                min-height: 48px;
                font-size: 15px;
                padding: 10px 20px;
                width: 100%;
                justify-content: flex-start;
            }

            .nav-toggle {
                display: flex;
            }

            .header__cta {
                display: none;
            }

            .nav-toggle.show + .header__actions .header__cta {
                display: none;
            }

            .article-header {
                padding: 40px 0 36px;
            }

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

            .article-back__inner {
                flex-direction: column;
            }

            .article-back__inner .btn {
                width: 100%;
            }

            .footer__links-wrap {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .logo__text {
                font-size: 17px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 22px;
            }

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

            .article-related__header {
                flex-direction: column;
                align-items: flex-start;
            }

            .footer__links-wrap {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (min-width: 769px) {
            .nav-toggle {
                display: none;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --bg-primary: #060A18;
            --bg-secondary: #0B1120;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-solid: #0D1428;
            --bg-deep: #04070F;
            --brand: #00C8FF;
            --brand-alt: #21E6C1;
            --gold: #F5B84B;
            --text: #E6EDF7;
            --text-muted: #A0AFC3;
            --text-weak: #5B6B82;
            --border: rgba(255, 255, 255, 0.09);
            --border-light: rgba(255, 255, 255, 0.14);
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.30);
            --shadow-glow: 0 0 20px rgba(0, 200, 255, 0.35);
            --gradient-primary: linear-gradient(90deg, #00C8FF 0%, #21E6C1 100%);
            --gradient-text: linear-gradient(120deg, #FFFFFF 0%, #B7ECFF 100%);
            --space-sec: clamp(64px, 10vw, 120px);
            --container: 1200px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
            --font-num: "Rajdhani", "DIN Alternate", "Bahnschrift", sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            padding-top: 68px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 工具类 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: clamp(16px, 4vw, 40px);
            padding-right: clamp(16px, 4vw, 40px);
        }
        .section {
            padding: var(--space-sec) 0;
            position: relative;
        }
        .section-head {
            margin-bottom: clamp(32px, 5vw, 56px);
            text-align: center;
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-title {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 15px;
            margin-top: 14px;
            line-height: 1.8;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
            min-height: 44px;
        }
        .btn--primary {
            background: var(--gradient-primary);
            color: #061018;
            box-shadow: var(--shadow-glow);
        }
        .btn--primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 32px rgba(0, 200, 255, 0.55);
            transform: translateY(-1px);
        }
        .btn--primary:active {
            transform: scale(0.98);
        }
        .btn--primary:focus-visible {
            outline: 2px dashed #fff;
            outline-offset: 3px;
        }
        .btn--secondary {
            background: transparent;
            border-color: rgba(0, 200, 255, 0.6);
            color: var(--brand);
        }
        .btn--secondary:hover {
            background: rgba(0, 200, 255, 0.08);
            border-color: var(--brand);
        }
        .btn--secondary:active {
            transform: scale(0.98);
        }
        .btn--secondary:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 3px;
        }
        .btn--sm {
            padding: 10px 22px;
            min-height: 40px;
        }
        .btn--ghost {
            background: transparent;
            color: var(--text-muted);
            border-color: transparent;
        }
        .btn--ghost:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 68px;
            z-index: 1000;
            background: rgba(6, 10, 24, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            flex-shrink: 0;
        }
        .logo__icon {
            width: 34px;
            height: 34px;
            display: block;
        }
        .logo__text {
            letter-spacing: 0.01em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.10);
            transition: all 0.3s ease;
            min-height: 40px;
            white-space: nowrap;
        }
        .nav-chip:hover {
            color: var(--text);
            border-color: var(--border-light);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-chip:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 2px;
        }
        .nav-chip.active {
            background: var(--gradient-primary);
            color: #061018;
            border-color: transparent;
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.25);
            font-weight: 600;
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header__cta {
            min-height: 40px;
            padding: 9px 22px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.04);
            padding: 0 10px;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            width: 22px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-toggle:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 2px;
        }

        /* ===== 页面头区 ===== */
        .page-hero {
            position: relative;
            padding: clamp(80px, 12vw, 140px) 0 clamp(56px, 8vw, 96px);
            background-image: linear-gradient(90deg, rgba(6, 10, 24, 0.94) 0%, rgba(6, 10, 24, 0.72) 50%, rgba(6, 10, 24, 0.35) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 200, 255, 0.18) 0%, transparent 70%);
            top: -140px;
            right: -80px;
            pointer-events: none;
        }
        .page-hero__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 28px;
        }
        .breadcrumb a {
            transition: color 0.25s;
        }
        .breadcrumb a:hover {
            color: var(--brand);
        }
        .breadcrumb span {
            color: var(--text-weak);
        }
        .page-hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            border: 1px solid rgba(245, 184, 75, 0.4);
            color: var(--gold);
            font-size: 13px;
            font-weight: 500;
            background: rgba(245, 184, 75, 0.06);
            margin-bottom: 20px;
        }
        .page-hero__title {
            font-size: clamp(40px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.02em;
            background: linear-gradient(120deg, #FFFFFF 0%, #B7ECFF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 18px;
        }
        .page-hero__subtitle {
            font-size: clamp(16px, 1.8vw, 19px);
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 36px;
        }
        .page-hero__btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 简介区 ===== */
        .intro-section {
            background: var(--bg-secondary);
            padding: var(--space-sec) 0;
            position: relative;
        }
        .intro-section::before {
            content: '';
            position: absolute;
            inset: 0;
            left: 0;
            right: 0;
            top: 0;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 200, 255, 0.03) 0%, transparent 50%);
            pointer-events: none;
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: clamp(32px, 5vw, 64px);
            align-items: center;
            position: relative;
        }
        .intro__media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .intro__media img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .intro__media::after {
            content: '专题精选';
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 6px 14px;
            background: rgba(6, 10, 24, 0.7);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(245, 184, 75, 0.4);
            color: var(--gold);
            font-size: 12px;
            border-radius: 999px;
        }
        .intro__content h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
        }
        .intro__content p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro__points {
            margin-top: 24px;
            display: grid;
            gap: 14px;
        }
        .intro__points li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .intro__points svg {
            flex-shrink: 0;
            margin-top: 3px;
            color: var(--brand-alt);
        }
        .intro__stats {
            display: flex;
            gap: clamp(20px, 3vw, 40px);
            margin-top: 32px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
        }
        .intro__stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .intro__stat-num {
            font-family: var(--font-num);
            font-size: clamp(28px, 3vw, 36px);
            font-weight: 700;
            color: var(--brand);
            line-height: 1;
        }
        .intro__stat-label {
            font-size: 12px;
            color: var(--text-weak);
        }

        /* ===== 专题卡片区 ===== */
        .topic-section {
            background: var(--bg-primary);
            padding: var(--space-sec) 0;
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .topic-card {
            background: var(--bg-card-solid);
            border: 1px solid var(--border);
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 200, 255, 0.4);
            box-shadow: 0 16px 40px rgba(0, 200, 255, 0.10);
        }
        .topic-card__cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
        }
        .topic-card__cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .topic-card:hover .topic-card__cover img {
            transform: scale(1.04);
        }
        .topic-card__tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            background: rgba(0, 200, 255, 0.16);
            border: 1px solid rgba(0, 200, 255, 0.35);
            color: var(--brand);
            font-size: 12px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
            font-weight: 500;
        }
        .topic-card__tag--gold {
            background: rgba(245, 184, 75, 0.14);
            border-color: rgba(245, 184, 75, 0.35);
            color: var(--gold);
        }
        .topic-card__body {
            padding: 22px 22px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .topic-card__title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text);
            transition: color 0.25s;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .topic-card:hover .topic-card__title {
            color: var(--brand);
        }
        .topic-card__desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .topic-card__meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-weak);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 14px;
        }
        .topic-card__link {
            color: var(--brand);
            font-size: 13px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.25s;
        }
        .topic-card__link:hover {
            gap: 8px;
        }
        .topic-card__link:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 特色区 ===== */
        .feature-section {
            background: var(--bg-secondary);
            padding: var(--space-sec) 0;
            position: relative;
            overflow: hidden;
        }
        .feature-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(33, 230, 193, 0.08) 0%, transparent 70%);
            bottom: -160px;
            left: -100px;
            pointer-events: none;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .feature-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 30px 24px;
            text-align: center;
            transition: all 0.35s ease;
        }
        .feature-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(0, 200, 255, 0.3);
            transform: translateY(-4px);
        }
        .feature-card__icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: rgba(0, 200, 255, 0.10);
            border: 1px solid rgba(0, 200, 255, 0.22);
            color: var(--brand);
        }
        .feature-card__title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .feature-card__desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-primary);
            padding: var(--space-sec) 0;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: 16px;
            transition: border-color 0.3s, background 0.3s;
        }
        .faq-item.active {
            border-color: rgba(0, 200, 255, 0.35);
            background: rgba(255, 255, 255, 0.05);
        }
        .faq-item__button {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            border-radius: 16px;
            transition: color 0.3s;
        }
        .faq-item__button:hover {
            color: var(--brand);
        }
        .faq-item__button:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: -2px;
            border-radius: 14px;
        }
        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid rgba(0, 200, 255, 0.2);
            color: var(--brand);
            font-size: 16px;
            font-weight: 300;
            transition: transform 0.3s ease;
            font-family: var(--font-sans);
        }
        .faq-item.active .faq-item__icon {
            transform: rotate(45deg);
        }
        .faq-item__answer-wrap {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item__answer {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: clamp(56px, 8vw, 96px) 0;
            background-image: linear-gradient(90deg, rgba(6, 10, 24, 0.90) 0%, rgba(6, 10, 24, 0.70) 50%, rgba(6, 10, 24, 0.35) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-top: 1px solid var(--border);
            text-align: center;
        }
        .cta-section__inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
            position: relative;
            z-index: 2;
        }
        .cta-section__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(245, 184, 75, 0.4);
            color: var(--gold);
            font-size: 12px;
        }
        .cta-section h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.3;
            max-width: 560px;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 460px;
            line-height: 1.7;
        }
        .cta-section__btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: clamp(48px, 7vw, 80px) 0 28px;
        }
        .footer__top {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: clamp(32px, 5vw, 64px);
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer__brand .logo {
            margin-bottom: 16px;
        }
        .footer__desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer__links-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .footer__links-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }
        .footer__links-list {
            display: grid;
            gap: 9px;
        }
        .footer__links-list a {
            font-size: 13px;
            color: var(--text-weak);
            transition: color 0.25s;
        }
        .footer__links-list a:hover {
            color: var(--brand);
        }
        .footer__links-list a:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .footer__friends {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 16px;
            padding: 22px 0 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-weak);
        }
        .footer__friends a {
            color: var(--text-weak);
        }
        .footer__friends a:hover {
            color: var(--brand);
        }
        .footer__bottom {
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-weak);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro-grid {
                grid-template-columns: 1fr;
            }
            .intro__media {
                max-width: 560px;
            }
            .footer__top {
                grid-template-columns: 1fr;
            }
            .main-nav {
                position: fixed;
                top: 68px;
                right: 0;
                bottom: 0;
                width: min(320px, 80vw);
                background: rgba(6, 10, 24, 0.97);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                padding: 28px 20px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
                border-left: 1px solid var(--border);
                z-index: 999;
                margin: 0;
            }
            .main-nav.open {
                transform: translateX(0);
            }
            .nav-chip {
                justify-content: center;
                font-size: 15px;
                padding: 14px 18px;
                width: 100%;
            }
            .nav-toggle {
                display: flex;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 62px;
            }
            .site-header,
            .header__inner {
                height: 62px;
            }
            .logo__text {
                font-size: 16px;
            }
            .header__cta {
                display: none;
            }
            .page-hero {
                padding: 72px 0 56px;
            }
            .page-hero__title {
                font-size: clamp(32px, 8vw, 44px);
            }
            .page-hero__btns .btn {
                flex: 1;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer__links-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro__stats {
                flex-wrap: wrap;
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .footer__links-wrap {
                grid-template-columns: 1fr;
            }
            .footer__bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .page-hero__btns {
                flex-direction: column;
                width: 100%;
            }
            .page-hero__btns .btn {
                width: 100%;
            }
            .cta-section__btns {
                flex-direction: column;
                width: 100%;
            }
            .cta-section__btns .btn {
                width: 100%;
            }
        }

/* roulang page: category2 */
:root{
  --bg-primary:#060A18;
  --bg-secondary:#0B1120;
  --bg-tertiary:#0D1428;
  --bg-deep:#04070F;
  --brand:#00C8FF;
  --brand-alt:#21E6C1;
  --gold:#F5B84B;
  --text-main:#E6EDF7;
  --text-sub:#A0AFC3;
  --text-muted:#5B6B82;
  --border-white:rgba(255,255,255,0.08);
  --border-white-strong:rgba(255,255,255,0.14);
  --glass-bg:rgba(255,255,255,0.05);
  --shadow-card:0 10px 30px rgba(0,0,0,0.30);
  --shadow-hover:0 16px 40px rgba(0,200,255,0.10);
  --radius-lg:20px;
  --radius-md:12px;
  --radius-sm:8px;
  --radius-pill:999px;
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --font-num:"Rajdhani","DIN Alternate","Bahnschrift",sans-serif;
  --grad-brand:linear-gradient(90deg,#00C8FF 0%,#00E0C6 100%);
  --grad-hero:linear-gradient(120deg,#FFFFFF 0%,#B7ECFF 100%);
  --grad-progress:linear-gradient(90deg,#00C8FF 0%,#21E6C1 100%);
  --transition:all .3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.7;
  color:var(--text-main);
  background:var(--bg-primary);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--brand-alt)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.container--wide{max-width:1400px}

/* 滚轮条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-secondary)}
::-webkit-scrollbar-thumb{background:#1E2A3F;border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:#2A3A55}

/* 导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:68px;
  background:rgba(6,10,24,0.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border-white);
}
.header__inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo__icon{width:34px;height:34px;flex-shrink:0}
.logo__text{
  font-size:20px;
  font-weight:800;
  color:var(--text-main);
  letter-spacing:0.02em;
  white-space:nowrap;
}
.logo:hover .logo__text{color:var(--brand)}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
  overflow-x:auto;
  scrollbar-width:none;
}
.main-nav::-webkit-scrollbar{display:none}
.nav-chip{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:9px 18px;
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:500;
  color:var(--text-sub);
  background:transparent;
  border:1px solid rgba(255,255,255,0.10);
  white-space:nowrap;
  transition:var(--transition);
  min-height:40px;
}
.nav-chip:hover{
  color:var(--text-main);
  border-color:rgba(0,200,255,0.35);
  background:rgba(0,200,255,0.06);
}
.nav-chip.active{
  background:var(--grad-brand);
  border-color:transparent;
  color:#07101A;
  font-weight:700;
  box-shadow:0 0 18px rgba(0,200,255,0.30);
}
.header__actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.header__cta{min-height:40px}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:var(--radius-md);
  border:1px solid var(--border-white);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:rgba(255,255,255,0.04);
  transition:var(--transition);
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--text-main);
  border-radius:2px;
  transition:var(--transition);
}
.nav-toggle:hover{border-color:rgba(0,200,255,0.4);background:rgba(0,200,255,0.06)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  min-height:44px;
  padding:12px 28px;
  line-height:1.4;
  border:1px solid transparent;
  transition:var(--transition);
  text-align:center;
  letter-spacing:0.01em;
}
.btn--primary{
  background:var(--grad-brand);
  color:#07101A;
  box-shadow:0 0 20px rgba(0,200,255,0.35);
}
.btn--primary:hover{
  box-shadow:0 0 32px rgba(0,200,255,0.55);
  color:#07101A;
  transform:translateY(-2px);
}
.btn--primary:active{transform:scale(0.98)}
.btn--primary:focus-visible,
.btn--secondary:focus-visible,
.btn--ghost:focus-visible{
  outline:2px dashed #ffffff;
  outline-offset:3px;
}
.btn--secondary{
  background:transparent;
  border-color:var(--brand);
  color:var(--brand);
}
.btn--secondary:hover{
  background:rgba(0,200,255,0.08);
  color:var(--brand);
  transform:translateY(-2px);
}
.btn--secondary:active{transform:scale(0.98)}
.btn--ghost{
  background:transparent;
  color:var(--text-sub);
  padding:8px 14px;
  min-height:40px;
}
.btn--ghost:hover{color:var(--brand);background:rgba(0,200,255,0.05)}
.btn--ghost:active{transform:scale(0.97)}
.btn--sm{min-height:40px;padding:8px 20px;font-size:14px}
.btn--lg{min-height:54px;padding:16px 44px;font-size:16px}

/* 通用板块 */
.section{
  padding:clamp(64px,10vw,120px) 0;
  position:relative;
}
.section--alt{background:var(--bg-secondary)}
.section__head{
  margin-bottom:48px;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.section__head--row{
  flex-direction:row;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
}
.section__kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:0.08em;
  color:var(--brand);
  text-transform:uppercase;
}
.section__kicker::before{
  content:"";
  width:22px;height:2px;
  background:var(--grad-brand);
  border-radius:2px;
}
.section__head h2{
  font-size:clamp(28px,3.5vw,40px);
  font-weight:700;
  line-height:1.2;
  color:var(--text-main);
}
.section__head p{
  color:var(--text-sub);
  font-size:15px;
  max-width:660px;
}

/* 徽章 */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:600;
  line-height:1.5;
}
.badge--gold{
  background:rgba(245,184,75,0.12);
  border:1px solid rgba(245,184,75,0.30);
  color:var(--gold);
}
.badge--brand{
  background:rgba(0,200,255,0.12);
  border:1px solid rgba(0,200,255,0.25);
  color:var(--brand);
}

/* 页码横幅 Hero */
.page-hero{
  position:relative;
  padding:150px 0 80px;
  background:
    linear-gradient(90deg,rgba(6,10,24,0.95) 0%,rgba(6,10,24,0.72) 55%,rgba(6,10,24,0.25) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--border-white);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  top:-100px;right:-100px;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(0,200,255,0.15) 0%,transparent 70%);
  pointer-events:none;
}
.page-hero__content{
  position:relative;
  z-index:2;
  max-width:780px;
}
.page-hero__content .badge{margin-bottom:20px}
.page-hero h1{
  font-size:clamp(36px,5vw,60px);
  font-weight:800;
  line-height:1.15;
  background:var(--grad-hero);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  margin-bottom:18px;
}
.page-hero__subtitle{
  font-size:clamp(16px,2vw,20px);
  color:var(--text-sub);
  line-height:1.7;
  margin-bottom:32px;
  max-width:600px;
}
.page-hero__actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.page-hero__features{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:44px;
}
.page-hero__features span{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-sub);
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border-white);
  padding:7px 16px;
  border-radius:var(--radius-pill);
}
.page-hero__features span::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand-alt);
  box-shadow:0 0 8px rgba(33,230,193,0.6);
  flex-shrink:0;
}

/* 分类介绍 */
.intro-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.intro__media{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  border:1px solid var(--border-white);
}
.intro__media img{
  width:100%;
  height:420px;
  object-fit:cover;
  transition:transform .6s ease;
}
.intro__media:hover img{transform:scale(1.03)}
.intro__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,10,24,0) 60%,rgba(6,10,24,0.6) 100%);
}
.intro__content{padding:10px 0}
.intro__content .section__kicker{margin-bottom:12px}
.intro__content h2{
  font-size:clamp(26px,2.8vw,36px);
  font-weight:700;
  line-height:1.25;
  margin-bottom:20px;
  color:var(--text-main);
}
.intro__content p{
  color:var(--text-sub);
  font-size:16px;
  line-height:1.8;
  margin-bottom:24px;
}
.intro__points{
  margin-bottom:32px;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.intro__points li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  font-size:15px;
  color:var(--text-main);
}
.intro__points li::before{
  content:"";
  width:20px;height:20px;
  background:var(--grad-brand);
  border-radius:50%;
  flex-shrink:0;
  margin-top:4px;
  box-shadow:0 0 10px rgba(0,200,255,0.3);
  position:relative;
}
.intro__points li::after{
  content:"✓";
  position:absolute;
  font-size:11px;
  color:#07101A;
  font-weight:700;
}
.intro__points li::after{
  position:relative;
  margin-left:-24px;
  margin-top:5px;
  width:20px;
  font-size:11px;
  color:#07101A;
  font-weight:700;
}

/* 价值卡片 */
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.feature-card{
  background:var(--glass-bg);
  border:1px solid var(--border-white);
  border-radius:var(--radius-lg);
  padding:36px 30px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:var(--transition);
  position:relative;
  overflow:hidden;
}
.feature-card::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:var(--grad-brand);
  opacity:0;
  transition:var(--transition);
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,200,255,0.4);
  box-shadow:var(--shadow-hover);
}
.feature-card:hover::after{opacity:1}
.feature-card__icon{
  width:54px;height:54px;
  border-radius:var(--radius-md);
  background:rgba(0,200,255,0.10);
  border:1px solid rgba(0,200,255,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:22px;
}
.feature-card__icon svg{width:26px;height:26px}
.feature-card h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
  color:var(--text-main);
}
.feature-card p{
  font-size:15px;
  color:var(--text-sub);
  line-height:1.7;
}

/* 场景区 */
.scenarios-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.scenario-card{
  background:var(--bg-tertiary);
  border:1px solid var(--border-white);
  border-radius:var(--radius-lg);
  padding:34px;
  transition:var(--transition);
}
.scenario-card--primary{
  background:linear-gradient(135deg,rgba(0,200,255,0.08) 0%,rgba(6,10,24,0.4) 100%);
  border-color:rgba(0,200,255,0.25);
}
.scenario-card:hover{
  transform:translateY(-3px);
  border-color:rgba(0,200,255,0.35);
  box-shadow:var(--shadow-hover);
}
.scenario-card h3{
  font-size:19px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:12px;
}
.scenario-card p{
  font-size:15px;
  color:var(--text-sub);
  line-height:1.7;
}

/* 精选卡片 */
.featured-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.topic-card{
  background:rgba(255,255,255,0.03);
  border:1px solid var(--border-white);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:var(--transition);
}
.topic-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,200,255,0.4);
  box-shadow:var(--shadow-hover);
}
.topic-card__cover{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--bg-secondary);
}
.topic-card__cover img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.topic-card:hover .topic-card__cover img{transform:scale(1.04)}
.topic-card__cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,10,24,0) 55%,rgba(6,10,24,0.5) 100%);
}
.topic-card__body{padding:24px 24px 26px}
.topic-card__body .tag{margin-bottom:14px}
.topic-card__body h3{
  font-size:19px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:10px;
  line-height:1.4;
}
.topic-card__desc{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.topic-card__meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:13px;
  color:var(--text-muted);
  border-top:1px solid var(--border-white);
  padding-top:16px;
}
.topic-card__meta a{
  font-weight:500;
  color:var(--brand);
}
.topic-card__meta a:hover{color:var(--brand-alt)}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 14px;
  border-radius:var(--radius-pill);
  font-size:12px;
  font-weight:500;
  background:rgba(0,200,255,0.12);
  color:var(--brand);
  line-height:1.6;
}

/* 流程步骤 */
.guide-steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:60px;
  position:relative;
}
.guide-steps::before{
  content:"";
  position:absolute;
  top:36px;left:16%;right:16%;
  height:2px;
  background:linear-gradient(90deg,rgba(0,200,255,0.1) 0%,rgba(33,230,193,0.4) 100%);
  z-index:1;
}
.guide-step{
  position:relative;
  z-index:2;
  text-align:left;
  padding-top:80px;
}
.guide-step__num{
  position:absolute;
  top:0;left:0;
  width:72px;height:72px;
  border-radius:50%;
  background:var(--bg-tertiary);
  border:1px solid rgba(0,200,255,0.4);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-num);
  font-size:30px;
  font-weight:700;
  color:var(--brand);
  box-shadow:0 0 24px rgba(0,200,255,0.15);
}
.guide-step h3{
  font-size:20px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:12px;
}
.guide-step p{
  font-size:15px;
  color:var(--text-sub);
  line-height:1.7;
}

/* FAQ */
.faq-list{
  max-width:860px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.faq-item{
  background:var(--glass-bg);
  border:1px solid var(--border-white);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{border-color:rgba(0,200,255,0.3)}
.faq-item.open{
  border-color:rgba(0,200,255,0.4);
  box-shadow:0 0 20px rgba(0,200,255,0.06);
}
.faq-item__q{
  width:100%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:22px 26px;
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  min-height:60px;
  text-align:left;
  transition:var(--transition);
}
.faq-item__q:hover{color:var(--brand)}
.faq-item__icon{
  flex-shrink:0;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid var(--border-white-strong);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  font-weight:400;
  color:var(--brand);
  transition:var(--transition);
}
.faq-item.open .faq-item__icon{
  transform:rotate(45deg);
  border-color:var(--brand);
  background:rgba(0,200,255,0.1);
}
.faq-item__a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-item__a p{
  padding:0 26px 24px;
  font-size:15px;
  color:var(--text-sub);
  line-height:1.75;
}

/* CTA */
.cta-card{
  position:relative;
  background:
    linear-gradient(120deg,rgba(6,10,24,0.85) 0%,rgba(13,20,40,0.75) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border:1px solid rgba(0,200,255,0.2);
  border-radius:var(--radius-lg);
  padding:clamp(48px,7vw,80px) clamp(28px,5vw,60px);
  text-align:center;
  overflow:hidden;
}
.cta-card::before{
  content:"";
  position:absolute;
  top:50%;left:50%;
  width:600px;height:600px;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(0,200,255,0.12) 0%,transparent 70%);
  pointer-events:none;
}
.cta-card h2{
  font-size:clamp(28px,3.5vw,40px);
  font-weight:700;
  color:var(--text-main);
  margin-bottom:16px;
  line-height:1.25;
}
.cta-card p{
  font-size:16px;
  color:var(--text-sub);
  margin-bottom:32px;
}
.cta-card .btn{position:relative;z-index:2}

/* 页脚 */
.site-footer{
  background:var(--bg-deep);
  padding:64px 0 32px;
  border-top:1px solid var(--border-white);
  margin-top:auto;
}
.footer__top{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:48px;
  margin-bottom:40px;
}
.footer__brand .logo{margin-bottom:14px}
.footer__desc{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.8;
  max-width:360px;
}
.footer__links-wrap{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.footer__links-title{
  font-size:14px;
  font-weight:600;
  color:var(--text-sub);
  margin-bottom:16px;
}
.footer__links-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer__links-list a{
  font-size:14px;
  color:var(--text-muted);
  transition:var(--transition);
}
.footer__links-list a:hover{color:var(--brand)}
.footer__friends{
  padding:22px 0;
  border-top:1px solid var(--border-white);
  border-bottom:1px solid var(--border-white);
  display:flex;
  align-items:center;
  gap:8px 20px;
  flex-wrap:wrap;
  margin-bottom:24px;
}
.footer__friends span{
  color:var(--text-muted);
  font-size:13px;
}
.footer__friends a{
  color:var(--text-muted);
  font-size:13px;
  transition:var(--transition);
}
.footer__friends a:hover{color:var(--brand)}
.footer__bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  color:var(--text-muted);
  font-size:13px;
}
.footer__bottom span{margin:0}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;
  top:68px;right:-100%;
  width:min(320px,80vw);
  bottom:0;
  background:rgba(6,10,24,0.97);
  border-left:1px solid var(--border-white);
  z-index:999;
  padding:24px 20px;
  display:flex;
  flex-direction:column;
  gap:12px;
  transition:right .35s ease;
  backdrop-filter:blur(20px);
}
.mobile-drawer.open{right:0}
.mobile-drawer .btn{width:100%}
.mobile-drawer .nav-chip{
  width:100%;
  justify-content:flex-start;
  min-height:52px;
  border-radius:var(--radius-md);
}

/* 响应式 */
@media (max-width:1024px){
  .features-grid{grid-template-columns:1fr 1fr}
  .featured-grid{grid-template-columns:1fr 1fr}
  .footer__top{grid-template-columns:1fr}
  .guide-steps::before{display:none}
  .intro-grid{grid-template-columns:1fr;gap:40px}
  .intro__media img{height:340px}
}
@media (max-width:768px){
  .main-nav,.header__cta{display:none}
  .nav-toggle{display:flex}
  .page-hero{
    padding:120px 0 60px;
  }
  .page-hero h1{font-size:34px}
  .page-hero__actions .btn{width:100%}
  .features-grid{grid-template-columns:1fr}
  .featured-grid{grid-template-columns:1fr}
  .scenarios-grid{grid-template-columns:1fr}
  .guide-steps{grid-template-columns:1fr;gap:48px}
  .guide-step{padding-top:64px}
  .guide-step__num{width:56px;height:56px;font-size:24px}
  .section__head--row{flex-direction:column;align-items:flex-start}
  .footer__links-wrap{grid-template-columns:1fr 1fr}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .logo__text{font-size:17px}
  .header__inner{gap:12px}
  .section{padding:56px 0}
  .page-hero__features span{font-size:12px;padding:6px 12px}
  .topic-card__body{padding:18px}
  .footer__links-wrap{grid-template-columns:1fr}
  .feature-card{padding:26px 22px}
  .scenario-card{padding:24px}
}