:root {
  --ink: #0E1A2E;
  --ink-2: #16253F;
  --text: #1C2433;
  --muted: #5B6577;
  --line: #E3E7EE;
  --bg: #FFFFFF;
  --bg-alt: #F5F7FA;
  --gold: #F5B83D;
  --flame: #E8572A;
  --grad: linear-gradient(120deg, var(--flame), var(--gold));
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; color: var(--ink); }
h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); letter-spacing: -.01em; }
h3 { font-size: 1.12rem; }
p { margin: 0 0 1em; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--flame); margin-bottom: .8em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 640px; }

/* 顶栏 */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(14, 26, 46, .92); backdrop-filter: saturate(150%) blur(10px); -webkit-backdrop-filter: saturate(150%) blur(10px); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; font-weight: 800; letter-spacing: .08em; font-size: .95rem; line-height: 1.05; }
.brand small { display: block; font-size: .62rem; font-weight: 600; letter-spacing: .26em; color: var(--gold); }
.links { margin-left: auto; display: flex; gap: 28px; }
.links a { color: rgba(255, 255, 255, .78); text-decoration: none; font-size: .93rem; }
.links a:hover { color: #fff; }
.lang { display: flex; padding: 3px; border-radius: 999px; background: rgba(255, 255, 255, .08); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1); }
.lang button { border: 0; background: transparent; color: rgba(255, 255, 255, .6); border-radius: 999px; padding: 5px 12px; min-width: 46px; font: inherit; font-size: .8rem; font-weight: 600; letter-spacing: .04em; cursor: pointer; transition: color .15s, background .15s; }
.lang button:hover { color: #fff; }
.lang button[aria-pressed="true"] { background: var(--grad); color: #fff; box-shadow: 0 4px 12px -4px rgba(232, 87, 42, .6); cursor: default; }
.lang button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

/* 首屏 */
.hero { position: relative; overflow: hidden; background: var(--ink); color: #fff; padding: 120px 0 128px; }
.hero::before { content: ""; position: absolute; right: -180px; top: -220px; width: 640px; height: 640px; border-radius: 50%; background: radial-gradient(circle, rgba(245, 184, 61, .28), rgba(232, 87, 42, .08) 55%, transparent 70%); }
.hero::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(180deg, #000, transparent 85%); -webkit-mask-image: linear-gradient(180deg, #000, transparent 85%); }
.hero .wrap { position: relative; z-index: 1; }
.hero h1 { color: #fff; max-width: 820px; }
.hero .lead { color: rgba(255, 255, 255, .72); }
.hero .eyebrow { color: var(--gold); }
.cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.btn { display: inline-block; padding: 13px 26px; border-radius: 999px; text-decoration: none; font-weight: 600; font-size: .98rem; transition: transform .15s, box-shadow .15s; }
.btn.primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px -10px rgba(232, 87, 42, .7); }
.btn.primary:hover { transform: translateY(-1px); }
.btn.ghost { border: 1px solid rgba(255, 255, 255, .35); color: #fff; }
.btn.ghost:hover { border-color: #fff; }

/* 通用区块 */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.two-col { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.prose { font-size: 1.06rem; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 36px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; transition: transform .2s, box-shadow .2s; }
.card:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -24px rgba(14, 26, 46, .35); }
.card p { color: var(--muted); font-size: .95rem; margin: 0; }
.icon { width: 44px; height: 44px; border-radius: 12px; background: var(--ink); display: grid; place-items: center; margin-bottom: 18px; }
.icon svg { width: 22px; height: 22px; fill: none; stroke: var(--gold); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.steps { list-style: none; padding: 0; margin: 36px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { border-top: 2px solid var(--line); padding-top: 22px; position: relative; }
.steps li::before { content: ""; position: absolute; top: -2px; left: 0; width: 48px; height: 2px; background: var(--grad); }
.steps span { font-weight: 800; font-size: .85rem; color: var(--flame); letter-spacing: .1em; display: block; margin-bottom: 10px; }
.steps p { color: var(--muted); font-size: .95rem; margin: 0; }

/* 联系 */
.section.dark { background: var(--ink); color: #fff; }
.section.dark h2 { color: #fff; }
.section.dark .eyebrow { color: var(--gold); }
.section.dark .lead { color: rgba(255, 255, 255, .7); }
.info { margin: 0; background: var(--ink-2); border: 1px solid rgba(255, 255, 255, .08); border-radius: var(--radius); padding: 8px 28px; }
.info div { padding: 18px 0; border-bottom: 1px solid rgba(255, 255, 255, .08); display: grid; grid-template-columns: 170px 1fr; gap: 16px; }
.info div:last-child { border-bottom: 0; }
.info dt { color: rgba(255, 255, 255, .55); font-size: .9rem; }
.info dd { margin: 0; font-weight: 500; }
.info a { color: var(--gold); text-decoration: none; }

.footer { background: #0A1322; color: rgba(255, 255, 255, .5); font-size: .85rem; padding: 26px 0; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer p { margin: 0; }

@media (max-width: 960px) {
  .grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .links { display: none; }
  .lang { margin-left: auto; }
  .hero { padding: 80px 0 88px; }
  .section { padding: 68px 0; }
  .grid, .steps { grid-template-columns: 1fr; }
  .info { padding: 4px 18px; }
  .info div { grid-template-columns: 1fr; gap: 2px; }
}