/* roulang page: index */
:root {
  --primary: #0F2F57;
  --primary-2: #163e72;
  --accent: #0070F3;
  --accent-d: #0059c2;
  --aurora: #10B981;
  --aurora-d: #059669;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --ink: #0F172A;
  --body: #334155;
  --muted: #64748B;
  --line: rgba(226, 232, 240, 0.95);
  --dark: #0B132B;
  --radius: 12px;
  --shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  --shadow-h: 0 16px 36px -12px rgba(15, 47, 87, 0.28);
  --space: 1.25rem;
  --header: 118px;
  --max: 1180px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--body);
  background: var(--bg);
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; height: auto; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1.25rem; }
p:last-child { margin-bottom: 0; }
h1, h2, h3 { margin: 0; color: var(--ink); font-weight: 700; line-height: 1.28; letter-spacing: -0.02em; }
ul, ol { margin: 0; padding: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--accent);
  color: #fff;
  padding: 8px 12px;
  z-index: 80;
  border-radius: 8px;
}
.skip:focus { top: 8px; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #fff;
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: rgba(248, 250, 252, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: rgba(15, 47, 87, 0.08);
  box-shadow: 0 8px 24px -18px rgba(15, 23, 42, 0.45);
}
.topbar { background: var(--primary); color: #d7e4f5; font-size: 13px; }
.topbar-inner, .nav-inner { display: flex; align-items: center; }
.topbar-inner { min-height: 40px; gap: 18px; flex-wrap: wrap; padding: 6px 0; }
.topbar a { color: #fff; }
.topbar-spacer { flex: 1; }
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #e8fff6;
  background: rgba(16, 185, 129, 0.16);
}
.nav-inner { min-height: 74px; gap: 18px; position: relative; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--primary); font-weight: 700; font-size: 20px; letter-spacing: -0.03em; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--primary), var(--accent));
  color: #fff; font-size: 16px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.18);
}
#site-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
#site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
}
#site-nav a:hover, #site-nav a.is-active { background: rgba(0, 112, 243, 0.1); color: var(--accent); }
#site-nav a:active { background: rgba(0, 112, 243, 0.18); }
.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px; height: 44px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  align-items: center; justify-content: center; flex-direction: column; gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 999px;
  border: 1px solid transparent; font-weight: 700; letter-spacing: 0.01em;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 18px -10px rgba(0,112,243,.9); }
.btn-primary:hover { background: var(--accent-d); }
.btn-aurora { background: var(--aurora); color: #04281c; }
.btn-aurora:hover { background: #34d399; box-shadow: 0 10px 22px -12px rgba(16,185,129,.9); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-line { background: #fff; color: var(--primary); border-color: #d5e1ef; }
.btn-line:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--shadow); }
.nav-cta { flex: 0 0 auto; }
.nav-cta-menu { display: none; }
.hero {
  position: relative;
  color: #fff;
  isolation: isolate;
  padding: 64px 0 128px;
  background: var(--dark);
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  overflow: hidden;
}
.hero-photo, .section-photo {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: -2;
}
.hero-photo { opacity: .38; transition: opacity .35s ease; }
.hero-photo.is-fading { opacity: 0; }
.hero-mask, .section-mask {
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(115deg, rgba(11,19,43,.94) 8%, rgba(15,47,87,.82) 48%, rgba(11,19,43,.62) 100%);
}
.eyebrow, .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: #9ae6c8; font-weight: 700; letter-spacing: .08em; font-size: 13px;
}
.eyebrow::before, .section-head .kicker::before {
  content: ""; width: 18px; height: 2px; background: var(--aurora); display: inline-block;
}
.hero h1 { font-size: clamp(32px, 4.4vw, 54px); max-width: 16em; color: #fff; margin: 12px 0 16px; }
.lead, .section-lead { font-weight: 400; font-size: 17px; }
.hero .lead { max-width: 760px; color: #e6eef8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0 8px; }
.coupon-wall {
  margin-top: 28px;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(240px, .7fr);
  gap: 16px;
  align-items: stretch;
}
.coupon {
  position: relative;
  background: #fff;
  color: var(--ink);
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.6);
  box-shadow: 0 18px 40px -24px rgba(0,0,0,.55);
  overflow: hidden;
}
.coupon::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 8px;
  background: linear-gradient(180deg, var(--accent), var(--aurora));
}
.coupon-main { padding: 26px 26px 22px 30px; min-height: 280px; display: flex; flex-direction: column; }
.coupon-main.is-hot { box-shadow: 0 0 0 2px rgba(16,185,129,.55), 0 22px 50px -24px rgba(0,112,243,.65); }
.coupon-kicker { color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: .06em; }
.coupon h2, .coupon-main strong.title { display: block; margin: 8px 0; font-size: clamp(26px, 3vw, 36px); color: var(--primary); }
.coupon p { color: var(--body); }
.coupon-meta {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed #d5deea;
  display: flex; justify-content: space-between; gap: 12px; align-items: center; flex-wrap: wrap;
}
.coupon-meta b { color: var(--aurora-d); font-size: 18px; }
.coupon-side { display: grid; gap: 16px; }
.coupon-mini {
  width: 100%; text-align: left; padding: 16px 16px 16px 22px; min-height: 132px;
  background: rgba(255,255,255,.96);
}
.coupon-mini small { color: var(--muted); display: block; }
.coupon-mini strong { display: block; color: var(--primary); font-size: 18px; margin: 4px 0; }
.coupon-mini:hover { transform: translateY(-4px); box-shadow: var(--shadow-h); }
.carousel-bar { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.arrow {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.35);
  background: rgba(8,16,36,.35); color: #fff; font-size: 20px;
}
.arrow:hover { background: rgba(255,255,255,.16); }
.dots { display: flex; gap: 8px; }
.dot {
  width: 44px; height: 10px; border: 0; border-radius: 999px;
  background: rgba(255,255,255,.35); padding: 0;
}
.dot.is-on { background: var(--aurora); }
section { padding: 88px 0; position: relative; }
.band-white { background: var(--white); }
.band-mist { background: var(--bg); }
.band-dark { background: var(--dark); color: #d5deea; overflow: hidden; }
.band-dark h2, .band-dark h3 { color: #fff; }
.band-dark .section-lead { color: #c9d5e6; }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head h2 { font-size: clamp(28px, 3vw, 40px); margin: 8px 0 12px; }
.kicker { color: var(--accent); letter-spacing: .04em; }
.band-dark .kicker { color: #6ee7b7; }
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; align-items: center; }
.frame {
  border-radius: 18px; overflow: hidden; border: 1px solid var(--line);
  box-shadow: var(--shadow); background: #fff; position: relative;
}
.frame img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.frame figcaption { padding: 12px 14px 14px; color: var(--muted); font-size: 14px; }
.pipeline { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; margin-top: 34px; }
.station {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 16px 16px; box-shadow: var(--shadow); min-height: 180px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.station:hover { transform: translateY(-4px); box-shadow: var(--shadow-h); }
.station i {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: rgba(0,112,243,.1); color: var(--accent); font-style: normal; font-weight: 800;
}
.station h3 { font-size: 18px; margin: 10px 0 6px; }
.station p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.metric-bar {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden;
  box-shadow: var(--shadow);
}
.metric { padding: 28px 22px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric strong { display: block; font-size: clamp(32px, 4vw, 46px); color: var(--primary); letter-spacing: -0.04em; line-height: 1; }
.metric span { display: block; margin-top: 8px; font-weight: 700; color: var(--ink); }
.metric em { display: block; margin-top: 4px; font-style: normal; color: var(--muted); font-size: 14px; }
.note { margin-top: 14px; color: var(--muted); font-size: 14px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
.spec { width: 100%; border-collapse: collapse; min-width: 680px; }
.spec caption { text-align: left; padding: 16px 18px; font-weight: 800; color: var(--primary); background: #f3f7fc; }
.spec th, .spec td { padding: 16px 18px; text-align: left; border-top: 1px solid #e8eef5; vertical-align: top; }
.spec tbody th { width: 28%; color: var(--ink); background: #fbfdff; }
.spec td { color: var(--body); }
.spec tr:hover td, .spec tr:hover th { background: #f4f9ff; }
.flow { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; margin: 8px 0 28px; position: relative; }
.flow-node {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 14px; padding: 14px 12px; min-height: 132px;
}
.flow-node b { display: block; color: #6ee7b7; font-size: 13px; }
.flow-node strong { display: block; color: #fff; margin: 6px 0; }
.flow-node span { color: #b7c4d6; font-size: 14px; }
.suite { display: grid; grid-template-columns: 280px 1fr; gap: 22px; align-items: center; padding: 18px; margin-top: 14px; border-radius: 16px; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08); }
.suite img { width: 100%; height: 180px; object-fit: cover; border-radius: 12px; }
.suite ul { margin-top: 8px; display: grid; gap: 6px; }
.suite li { list-style: none; padding-left: 16px; position: relative; color: #d5deea; }
.suite li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--aurora); position: absolute; left: 0; top: .65em; }
.case-layout { display: grid; grid-template-columns: 220px 1fr; gap: 22px; }
.case-tabs { display: flex; flex-direction: column; gap: 8px; }
.case-tabs button {
  min-height: 48px; text-align: left; padding: 0 14px; border-radius: 12px;
  border: 1px solid var(--line); background: #fff; color: var(--primary); font-weight: 700;
}
.case-tabs button.is-on { background: var(--primary); color: #fff; border-color: var(--primary); }
.case-panel { display: none; grid-template-columns: 1.05fr .95fr; gap: 22px; align-items: center; }
.case-panel.is-on { display: grid; }
.case-panel img { width: 100%; aspect-ratio: 16/11; object-fit: cover; border-radius: 16px; }
.versus { display: grid; grid-template-columns: 1fr 1fr; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.versus-col { padding: 28px; }
.versus-col.is-old { background: #fff; }
.versus-col.is-new { background: linear-gradient(180deg, #0F2F57, #0B132B); color: #e8eef8; }
.versus-col h3 { font-size: 24px; margin-bottom: 8px; }
.versus-col.is-new h3, .versus-col.is-new dt { color: #fff; }
.versus dl { margin-top: 16px; }
.versus div.row { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; border-top: 1px solid rgba(148,163,184,.25); }
.versus dt { font-weight: 700; }
.versus dd { margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -0.03em; color: var(--primary); }
.versus-col.is-new dd { color: #6ee7b7; }
.steps { list-style: none; display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 52px 1fr; gap: 12px; align-items: start; }
.step b {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(0,112,243,.1); color: var(--accent);
}
.step h3 { font-size: 18px; }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 0; right: 0; top: 18px; height: 2px; background: #d7e2ee; }
.mile { position: relative; padding-top: 42px; }
.mile::before {
  content: ""; position: absolute; left: 0; top: 11px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 4px solid var(--accent); box-shadow: 0 0 0 4px rgba(0,112,243,.12);
}
.mile h3 { font-size: 18px; margin-bottom: 6px; }
.mile p { color: var(--muted); font-size: 14px; }
.news-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 18px; }
.news-feature, .news-item {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}
.news-feature:hover, .news-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-h); }
.news-feature img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.news-copy, .news-item { padding: 16px 16px 18px; }
.news-item { display: grid; grid-template-columns: 112px 1fr; gap: 12px; padding: 12px; }
.news-item + .news-item { margin-top: 12px; }
.news-item img { width: 112px; height: 96px; object-fit: cover; border-radius: 10px; }
.time { color: var(--accent); font-size: 13px; font-weight: 700; }
.news-side { display: flex; flex-direction: column; }
.partner-wall { display: flex; flex-wrap: wrap; gap: 12px; }
.partner-chip {
  min-height: 64px; padding: 12px 16px; border-radius: 14px; background: #fff;
  border: 1px solid var(--line); box-shadow: var(--shadow); min-width: 180px; flex: 1;
}
.partner-chip strong { display: block; color: var(--primary); }
.partner-chip span { color: var(--muted); font-size: 14px; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.trust-item { padding: 26px 20px; border-right: 1px solid var(--line); }
.trust-item:last-child { border-right: 0; }
.trust-item svg { width: 36px; height: 36px; }
.trust-item h3 { margin: 10px 0 6px; font-size: 18px; }
.trust-item p { color: var(--muted); font-size: 14px; }
.consult-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 28px; align-items: start; }
.consult-card, form {
  background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 22px;
}
.consult-card ol { margin: 12px 0 0 18px; color: var(--body); }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; min-height: 48px; border-radius: 12px; border: 1px solid #d5deea; background: #fbfdff; padding: 10px 12px;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--accent); background: #fff; outline: none; box-shadow: 0 0 0 4px rgba(0,112,243,.12); }
.field.is-invalid input, .field.is-invalid .check-grid { border-color: #dc2626; }
.check-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.check-grid label {
  min-height: 44px; display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid #d5deea; border-radius: 999px; padding: 0 12px; background: #fff; font-weight: 600; color: var(--primary);
}
.check-grid label:has(input:checked) { border-color: var(--accent); background: rgba(0,112,243,.08); color: var(--accent); }
.check-grid input { accent-color: var(--accent); width: 16px; height: 16px; }
.form-note { min-height: 1.5em; color: var(--primary); font-weight: 700; }
.form-note.is-error { color: #b91c1c; }
.readonly { background: #f1f5f9; }
.site-footer { background: #08101f; color: #c5d0e0; padding: 56px 0 24px; }
.foot-grid { display: grid; grid-template-columns: 1.3fr .8fr .9fr .9fr; gap: 28px; }
.site-footer h2 { color: #fff; font-size: 18px; margin-bottom: 12px; }
.site-footer a { display: inline-flex; min-height: 32px; align-items: center; color: #d5deea; }
.site-footer a:hover { color: #6ee7b7; }
.foot-links { display: grid; gap: 2px; }
.legal { margin-top: 28px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.08); color: #93a0b5; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.badge-row span { border: 1px solid rgba(255,255,255,.14); border-radius: 999px; padding: 4px 8px; font-size: 12px; }
@media (max-width: 1024px) {
  .pipeline, .metric-bar, .flow, .timeline, .trust-grid, .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .metric { border-bottom: 1px solid var(--line); }
  .timeline::before { display: none; }
  .mile { padding-top: 0; }
  .mile::before { display: none; }
  .nav-toggle { display: inline-flex; }
  #site-nav {
    display: none; position: absolute; top: calc(100% + 1px); left: 50%;
    width: 100vw; transform: translateX(-50%);
    flex-direction: column; align-items: stretch;
    background: rgba(255,255,255,.98); padding: 10px 16px 16px;
    box-shadow: 0 18px 36px rgba(15,23,42,.12); max-height: 70vh; overflow: auto;
  }
  #site-nav.is-open { display: flex; }
  #site-nav a { border-radius: 10px; }
  .nav-cta-menu { display: inline-flex; margin-top: 8px; }
  .case-layout, .split, .consult-grid, .news-layout, .suite, .case-panel.is-on { grid-template-columns: 1fr; }
  .coupon-wall { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  section { padding: 64px 0; }
  .hero { padding: 42px 0 96px; clip-path: polygon(0 0, 100% 0, 100% 97%, 0 100%); }
  .container { width: min(var(--max), calc(100% - 28px)); }
  .versus, .pipeline, .metric-bar, .flow, .timeline, .trust-grid, .foot-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 88px 1fr; }
  .case-tabs { flex-direction: row; overflow-x: auto; }
  .case-tabs button { flex: 0 0 auto; }
  .topbar-inner { gap: 8px 14px; }
}
@media (max-width: 520px) {
  .nav-cta { display: none; }
  .hero-actions .btn, .coupon-meta .btn, form .btn { width: 100%; }
  .metric strong { font-size: 36px; }
  .versus dd { font-size: 24px; }
  .news-item { grid-template-columns: 1fr; }
  .news-item img { width: 100%; height: 140px; }
  .legal { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.site-header.is-stuck{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);box-shadow:0 8px 24px rgba(15,23,42,.08)}