:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d1b18;
  --muted: #6b665e;
  --line: #e9e5dd;
  --accent: #e0703a;
  --accent-ink: #ffffff;
  --accent-soft: #fbeee6;
  --ok: #2f7d4f;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(29, 27, 24, .04), 0 8px 24px rgba(29, 27, 24, .06);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141311;
    --surface: #1c1a17;
    --ink: #f1ede6;
    --muted: #a39d93;
    --line: #2d2a25;
    --accent: #f08a55;
    --accent-ink: #1a0f08;
    --accent-soft: #2a1e17;
    --ok: #6cc290;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img, svg { display: block; }

.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }

/* 顶栏 */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; text-decoration: none; }
.brand svg { width: 26px; height: 26px; color: var(--accent); }
.nav nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav nav a { text-decoration: none; color: var(--muted); }
.nav nav a:hover { color: var(--ink); }
.nav nav a.btn-primary, .nav nav a.btn-primary:hover { color: var(--accent-ink); }
.nav .btn { padding: 7px 14px; font-size: 14px; }
@media (max-width: 720px) { .nav nav a:not(.btn) { display: none; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 999px; border: 1px solid transparent;
  font: 600 15px/1 var(--font); text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn-ghost { border-color: var(--line); background: var(--surface); }
.btn-ghost:hover { border-color: var(--muted); }

/* 首屏 */
.hero { padding: 88px 0 72px; }
.eyebrow {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 600;
}
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.15; margin: 18px 0 16px; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: clamp(16px, 2.2vw, 19px); color: var(--muted); max-width: 620px; margin: 0 0 30px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }

.terminal {
  margin-top: 48px; border-radius: var(--radius); background: #1a1916; color: #e8e3da;
  font: 14px/1.8 var(--mono); padding: 18px 22px; box-shadow: var(--shadow); overflow-x: auto;
  border: 1px solid #2b2924;
}
.terminal .dim { color: #8b857a; }
.terminal .ok { color: #7fd19f; }
.terminal .acc { color: #f5a273; }

/* 区块 */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(26px, 4vw, 34px); line-height: 1.25; margin: 0 0 10px; letter-spacing: -.3px; }
.section-head p { color: var(--muted); margin: 0; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.card h3 { margin: 12px 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .icon {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.card .icon svg { width: 20px; height: 20px; }
.tag { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; vertical-align: 2px; background: var(--line); color: var(--muted); }

/* 流程 */
.steps { counter-reset: s; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.step { position: relative; padding: 20px 20px 20px 20px; border-left: 2px solid var(--line); }
.step::before {
  counter-increment: s; content: counter(s);
  display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--ink); color: var(--bg); font-weight: 700; font-size: 14px; margin-bottom: 10px;
}
.step h3 { margin: 0 0 4px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* 价格 */
.plans { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); align-items: stretch; }
.plan { display: flex; flex-direction: column; }
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.plan .name { font-weight: 700; font-size: 17px; display: flex; align-items: center; justify-content: space-between; }
.plan .badge { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); }
.plan .price { margin: 14px 0 4px; font-size: 38px; font-weight: 800; letter-spacing: -1px; }
.plan .price small { font-size: 15px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.plan .yearly { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 22px; display: grid; gap: 8px; font-size: 15px; }
.plan li { display: flex; gap: 10px; }
.plan li::before { content: ""; flex: none; width: 16px; height: 16px; margin-top: 5px; border-radius: 50%; background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23e0703a' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4.5 8.2l2.3 2.3 4.7-5'/%3E%3C/svg%3E") center/16px no-repeat; }
.plan .btn { margin-top: auto; }
.note { margin-top: 18px; color: var(--muted); font-size: 14px; }

.extra { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin-top: 16px; }
.extra .card { display: flex; gap: 16px; align-items: flex-start; }
.extra .card .price-sm { margin-left: auto; font-weight: 700; white-space: nowrap; }

/* 说明框 */
.callout {
  display: grid; gap: 8px; padding: 22px 24px; border-radius: var(--radius);
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.callout h3 { margin: 0; font-size: 17px; }
.callout p { margin: 0; color: var(--ink); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; }
.faq summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 16px; color: var(--muted); }

/* 表单 */
.apply { display: grid; gap: 32px; grid-template-columns: 1fr; }
@media (min-width: 880px) { .apply { grid-template-columns: 5fr 7fr; } }
form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 14px; }
.field .hint { color: var(--muted); font-size: 13px; font-weight: 400; }
input, select, textarea {
  width: 100%; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); font: 15px/1.5 var(--font);
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 1px; border-color: var(--accent); }
textarea { min-height: 110px; resize: vertical; }
.row2 { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 560px) { .row2 { grid-template-columns: 1fr 1fr; } }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--muted); }
.check input { width: 18px; height: 18px; margin-top: 3px; flex: none; accent-color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { font-size: 14px; min-height: 1.5em; margin: 0; }
.form-msg.ok { color: var(--ok); }
.form-msg.err { color: #c43d2f; }

/* 页脚 */
footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
footer .links { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }

/* 条款页 */
.doc { max-width: 760px; padding: 56px 0 80px; }
.doc h1 { font-size: clamp(28px, 4.5vw, 38px); margin: 0 0 6px; }
.doc .meta { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
.doc h2 { font-size: 20px; margin: 36px 0 10px; }
.doc p, .doc li { color: color-mix(in srgb, var(--ink) 88%, var(--muted)); }
.doc ul, .doc ol { padding-left: 22px; }
.doc li + li { margin-top: 6px; }
.doc .callout { margin: 24px 0; }
.extra .card h3 { margin-top: 0; }