:root {
  --bg: #000000;
  --bg-soft: #0a0a0c;
  --fg: #f5f5f7;
  --muted: #86868b;
  --accent: #2997ff;
  --accent2: #7c5cff;
  --card: #141416;
  --card-border: rgba(255, 255, 255, 0.08);
  --nav-h: 52px;
  --maxw: 980px;
}
:root[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --fg: #111827;
  --muted: #5f6877;
  --accent: #0969da;
  --accent2: #6842d9;
  --card: #ffffff;
  --card-border: rgba(15, 23, 42, 0.12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* Nav */
nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 22px; z-index: 100;
  background: rgba(22, 22, 23, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--card-border);
  font-size: 14px;
}
nav .brand { font-weight: 600; letter-spacing: -0.01em; display: flex; align-items: center; gap: 8px; }
nav .brand img { width: 24px; height: 24px; border-radius: 6px; }
nav .links { height: 100%; display: flex; align-items: center; gap: 6px; }
nav .links a {
  height: 34px; padding: 0 12px;
  display: inline-flex; align-items: center; justify-content: center;
  line-height: 1; opacity: 0.85; border-radius: 980px;
  transition: color 0.2s, background 0.2s, opacity 0.2s;
}
nav .links a:hover { opacity: 1; }
nav .nav-login {
  padding: 0 16px; background: var(--accent);
  color: #fff; font-weight: 500;
}
nav .nav-login:hover { background: #0077ed; }
.theme-toggle {
  width: 34px; height: 34px; margin-left: 8px; flex: 0 0 34px;
  border: 1px solid var(--card-border); border-radius: 50%; color: var(--fg);
  background: var(--card); cursor: pointer; font: inherit; font-size: 16px;
  transition: border-color .2s, background .2s, transform .2s;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(12deg); }

/* Layout */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
section { padding: 120px 0; }
.eyebrow { color: var(--accent); font-size: 17px; font-weight: 600; letter-spacing: 0.01em; }
h1.title {
  font-size: clamp(48px, 10vw, 96px); font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.05; margin: 6px 0 14px;
  background: linear-gradient(180deg, #ffffff, #b0b0b8);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
h2.title { font-size: clamp(30px, 5vw, 48px); font-weight: 700; letter-spacing: -0.02em; }
.sub { font-size: clamp(17px, 2.2vw, 22px); color: var(--muted); }

/* Buttons */
.cta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 30px; }
.btn {
  text-decoration: none; font-size: 16px; padding: 11px 22px; border-radius: 980px;
  transition: transform 0.2s, background 0.3s, opacity 0.3s; cursor: pointer; border: none;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #0077ed; transform: scale(1.03); }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid rgba(41,151,255,0.5); }
.btn-ghost:hover { opacity: 0.7; transform: scale(1.03); }

/* Hero */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 0 22px;
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(41,151,255,0.10) 0%, rgba(0,0,0,0) 55%),
    radial-gradient(80% 80% at 50% 100%, rgba(120,80,255,0.08) 0%, rgba(0,0,0,0) 60%);
}
.home-page { min-height: 100svh; display: flex; flex-direction: column; }
.home-main { flex: 1; min-height: 0; display: flex; }
.home-page .hero { width: 100%; min-height: 0; padding-top: var(--nav-h); }
.home-footer { padding: 16px 22px 18px; }
.home-footer .beian { margin-top: 8px; }
.hero-note { max-width: 540px; margin-top: 18px; color: var(--muted); font-size: 14px; }
.hero-route-links { display: flex; gap: 24px; margin-top: 24px; color: var(--accent); font-size: 15px; }
.hero-route-links a:hover { text-decoration: underline; text-underline-offset: 4px; }

/* Cards grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-top: 40px; }
.card {
  background: var(--card); border: 1px solid var(--card-border); border-radius: 18px;
  padding: 28px; transition: transform 0.25s, border-color 0.25s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(41,151,255,0.4); }
.card h3 { font-size: 20px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }
.card .tag { display: inline-block; margin-top: 14px; font-size: 12px; color: var(--accent);
  border: 1px solid rgba(41,151,255,0.4); padding: 3px 10px; border-radius: 980px; }

/* About */
.about-flex { display: flex; gap: 40px; flex-wrap: wrap; align-items: center; margin-top: 30px; }
.about-text { flex: 1; min-width: 280px; }
.about-text p { color: var(--muted); font-size: 17px; margin-bottom: 16px; }
.skills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.skills span { font-size: 13px; color: var(--fg); background: var(--card);
  border: 1px solid var(--card-border); padding: 6px 14px; border-radius: 980px; }

/* Contact */
.contact-list { margin-top: 30px; display: flex; flex-direction: column; gap: 14px; }
.contact-list .row { display: flex; align-items: center; gap: 14px; padding: 16px 20px;
  background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; }
.contact-list .row b { width: 90px; color: var(--accent); font-weight: 600; }
.contact-list .row span { color: var(--muted); }

/* Forms (login) */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 80px 22px 40px; }
.auth-card {
  width: 100%; max-width: 400px; background: var(--card); border: 1px solid var(--card-border);
  border-radius: 22px; padding: 36px 32px;
}
.auth-card h2 { text-align: center; font-size: 26px; margin-bottom: 6px; }
.auth-card .hint { text-align: center; color: var(--muted); font-size: 14px; margin-bottom: 26px; }
.tabs { display: flex; gap: 8px; margin-bottom: 22px; background: var(--bg-soft);
  border-radius: 980px; padding: 4px; }
.tabs button { flex: 1; padding: 9px; border: none; background: transparent; color: var(--muted);
  border-radius: 980px; font-size: 14px; cursor: pointer; font-family: inherit; transition: 0.2s; }
.tabs button.active { background: var(--accent); color: #fff; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 7px; }
.field input {
  width: 100%; padding: 13px 15px; border-radius: 12px; border: 1px solid var(--card-border);
  background: var(--bg-soft); color: var(--fg); font-size: 15px; font-family: inherit;
  transition: border-color 0.2s;
}
.field input:focus { outline: none; border-color: var(--accent); }
.auth-card .btn-primary { width: 100%; padding: 13px; font-size: 16px; }
.msg { margin-top: 16px; text-align: center; font-size: 14px; min-height: 20px; }
.msg.err { color: #ff6b6b; }
.msg.ok { color: #4ade80; }

/* Dashboard */
.dash-head { padding: 140px 0 40px; text-align: center; }
.dash-head h1 { font-size: clamp(36px, 6vw, 56px); font-weight: 700; letter-spacing: -0.02em; }
.dash-head p { color: var(--muted); margin-top: 10px; }
.dash-card { max-width: 640px; margin: 30px auto; background: var(--card);
  border: 1px solid var(--card-border); border-radius: 18px; padding: 30px; }
.dash-card h3 { margin-bottom: 16px; font-size: 18px; }
.dash-card .kv { display: flex; justify-content: space-between; padding: 12px 0;
  border-bottom: 1px solid var(--card-border); font-size: 15px; }
.dash-card .kv:last-child { border-bottom: none; }
.dash-card .kv b { color: var(--muted); font-weight: 500; }

/* Commercial pages */
.commerce-page {
  min-height: 100vh;
  background:
    radial-gradient(70% 45% at 50% 0%, rgba(41,151,255,.14), transparent 72%),
    var(--bg);
}
.commerce-main { max-width: 1120px; margin: 0 auto; padding: 130px 22px 70px; }
.commerce-hero { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.commerce-hero .kicker { color: #79bbff; font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.commerce-hero h1 { margin: 12px 0 14px; font-size: clamp(38px, 7vw, 66px); line-height: 1.06; letter-spacing: -.045em; }
.commerce-hero p { color: var(--muted); font-size: 17px; line-height: 1.75; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 0; }
.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 25px;
  border: 1px solid var(--card-border);
  border-radius: 20px;
  background: linear-gradient(155deg, rgba(255,255,255,.065), rgba(255,255,255,.025));
}
.price-card.featured { border-color: rgba(41,151,255,.55); box-shadow: 0 20px 70px rgba(0,108,255,.14); }
.price-badge { position: absolute; top: 16px; right: 16px; padding: 5px 9px; border-radius: 999px; color: #bfe1ff; background: rgba(41,151,255,.15); font-size: 11px; font-weight: 700; }
.price-name { color: #b8b8c0; font-size: 14px; font-weight: 600; }
.price-hours { margin-top: 10px; font-size: 30px; font-weight: 750; letter-spacing: -.03em; }
.price-total { margin: 20px 0 2px; font-size: 30px; font-weight: 750; }
.price-total small { color: var(--muted); font-size: 14px; font-weight: 500; }
.price-unit { color: var(--muted); font-size: 13px; }
.price-note { margin: 18px 0 22px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.price-card .btn { width: 100%; margin-top: auto; text-align: center; }
.commerce-note { margin-top: 28px; padding: 20px 22px; border: 1px solid var(--card-border); border-radius: 16px; color: var(--muted); background: var(--card); font-size: 13px; line-height: 1.75; }
.commerce-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.commerce-links a, .support-help > div { display: grid; gap: 5px; padding: 16px 18px; border: 1px solid var(--card-border); border-radius: 14px; background: color-mix(in srgb, var(--card) 84%, transparent); }
.commerce-links a:hover { border-color: var(--accent); }
.commerce-links strong, .support-help strong { font-size: 14px; }
.commerce-links span, .support-help span { color: var(--muted); font-size: 12px; line-height: 1.6; }
.support-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 20px; align-items: start; }
.support-card { padding: 28px; border: 1px solid var(--card-border); border-radius: 20px; background: var(--card); }
.support-card h2 { margin-bottom: 7px; font-size: 22px; }
.support-card > p { margin-bottom: 24px; color: var(--muted); font-size: 14px; }
.support-field { display: grid; gap: 7px; margin-bottom: 16px; color: var(--muted); font-size: 13px; }
.support-field input, .support-field select, .support-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  outline: none;
  color: var(--fg);
  background: var(--bg-soft);
  font: inherit;
}
.support-field textarea { min-height: 132px; resize: vertical; }
.support-field input:focus, .support-field select:focus, .support-field textarea:focus { border-color: var(--accent); }
.ticket-list { display: grid; gap: 10px; }
.ticket-item { padding: 14px; border: 1px solid var(--card-border); border-radius: 13px; background: var(--bg-soft); }
.ticket-item strong { display: block; margin-bottom: 4px; font-size: 14px; }
.ticket-item span { color: var(--muted); font-size: 12px; }
.commerce-status { min-height: 22px; margin-top: 14px; font-size: 13px; }
.commerce-status.ok { color: #4ade80; }
.commerce-status.err { color: #ff6b6b; }
.admin-main { max-width: 1280px; }
.admin-mfa { max-width: 720px; margin: 0 auto 22px; }
.admin-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.admin-wide { grid-column: 1 / -1; }
.admin-panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 18px; }
.admin-panel-head h2 { margin-bottom: 6px; }
.admin-panel-head p, .admin-panel > p, .admin-mfa > p { color: var(--muted); font-size: 13px; }
.admin-inline-form { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.admin-inline-form input, .admin-inline-form select { min-width: 150px; padding: 10px 12px; border: 1px solid var(--card-border); border-radius: 10px; background: var(--bg-soft); color: var(--fg); font: inherit; }
.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th, .admin-table td { padding: 12px 10px; border-bottom: 1px solid var(--card-border); text-align: left; white-space: nowrap; }
.admin-table th { color: var(--muted); font-weight: 500; }
.admin-table td small, .admin-ticket small, .admin-refund small, .admin-audit-row small { display: block; color: var(--muted); font-size: 11px; margin-top: 3px; }
.admin-actions { display: flex; gap: 6px; }
.admin-actions button { border: 1px solid var(--card-border); border-radius: 8px; padding: 6px 8px; background: var(--bg-soft); color: var(--fg); cursor: pointer; }
.admin-pill { display: inline-block; padding: 3px 8px; border-radius: 999px; font-size: 11px; }
.admin-pill.is-ok { color: #4ade80; background: rgba(74,222,128,.12); }
.admin-pill.is-danger { color: #ff6b6b; background: rgba(255,107,107,.12); }
.admin-output { max-height: 250px; overflow: auto; margin-top: 16px; padding: 12px; border: 1px solid var(--card-border); border-radius: 10px; color: #bfe1ff; background: var(--bg-soft); white-space: pre-wrap; word-break: break-all; }
.admin-ticket-list, .admin-refunds, .admin-audit { display: grid; gap: 12px; }
.admin-ticket, .admin-refund { padding: 16px; border: 1px solid var(--card-border); border-radius: 14px; background: var(--bg-soft); }
.admin-ticket > p { margin: 12px 0; color: var(--muted); white-space: pre-wrap; }
.admin-ticket select { padding: 8px; border: 1px solid var(--card-border); border-radius: 8px; color: var(--fg); background: var(--card); }
.admin-messages { display: grid; gap: 7px; margin: 12px 0; }
.admin-message { display: grid; gap: 3px; padding: 9px 11px; border-left: 3px solid var(--accent); background: rgba(41,151,255,.06); font-size: 13px; }
.admin-message.is-internal { border-left-color: #ffbd6c; background: rgba(255,189,108,.07); }
.admin-message b { font-size: 11px; color: var(--muted); }
.admin-refund { display: grid; gap: 5px; }
.admin-audit-row { display: grid; grid-template-columns: 1fr 1.3fr auto; gap: 10px; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--card-border); font-size: 12px; }
.admin-audit-row span { color: var(--muted); overflow: hidden; text-overflow: ellipsis; }
.admin-export { margin-top: 16px; }
.support-help { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.session-modal[hidden] { display: none; }
.session-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 22px; background: rgba(0, 0, 0, .62); }
.session-modal-card { width: min(100%, 430px); padding: 28px; border: 1px solid var(--card-border); border-radius: 20px; background: var(--card); box-shadow: 0 24px 80px rgba(0,0,0,.3); }
.session-modal-card .kicker { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.session-modal-card h2 { margin: 9px 0 10px; font-size: 24px; }
.session-modal-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.session-modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }
.docs-page { min-height: 100vh; background: var(--bg); }
.docs-main { max-width: 1040px; margin: 0 auto; padding: 126px 22px 70px; }
.docs-hero { max-width: 760px; margin-bottom: 38px; }
.docs-hero .kicker, .docs-kicker { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.docs-hero h1 { margin: 10px 0 14px; font-size: clamp(36px, 6vw, 60px); line-height: 1.08; letter-spacing: -.045em; }
.docs-hero p, .docs-prose > p, .docs-prose li { color: var(--muted); font-size: 15px; line-height: 1.8; }
.docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.docs-card { display: grid; gap: 8px; padding: 20px; border: 1px solid var(--card-border); border-radius: 16px; background: var(--card); }
.docs-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.docs-card h2 { font-size: 17px; }
.docs-card p { color: var(--muted); font-size: 13px; line-height: 1.65; }
.docs-card .docs-arrow { color: var(--accent); font-size: 13px; }
.docs-prose { max-width: 780px; padding: 28px; border: 1px solid var(--card-border); border-radius: 20px; background: var(--card); }
.docs-prose h2 { margin: 30px 0 10px; font-size: 22px; }
.docs-prose h2:first-child { margin-top: 0; }
.docs-prose h3 { margin: 22px 0 7px; font-size: 16px; }
.docs-prose ul, .docs-prose ol { padding-left: 22px; margin: 10px 0 18px; }
.docs-prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.docs-callout { margin: 18px 0; padding: 16px 18px; border-left: 3px solid var(--accent); border-radius: 8px; background: color-mix(in srgb, var(--accent) 9%, var(--card)); color: var(--muted); font-size: 14px; line-height: 1.7; }
.status-list { display: grid; gap: 12px; margin: 18px 0 24px; }
.status-row { display: flex; justify-content: space-between; gap: 18px; padding: 15px 16px; border: 1px solid var(--card-border); border-radius: 12px; }
.status-row span:last-child { color: #4ade80; font-size: 13px; font-weight: 700; }
.docs-back { display: inline-flex; margin-top: 24px; color: var(--accent); font-size: 14px; }

footer { text-align: center; padding: 50px 22px 24px; color: var(--muted); font-size: 12px; }

/* Beian */
.beian {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 16px; margin-top: 14px; font-size: 12px; color: var(--muted);
}
.beian a { color: var(--muted); transition: color 0.2s; }
.beian a:hover { color: var(--fg); }
.beian img { width: 20px; height: 20px; margin-right: 6px; vertical-align: middle; }
.beian .divider { opacity: 0.3; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

@media (max-width: 600px) {
  nav { padding: 0 14px; }
  nav .links { gap: 0; }
  nav .links a { padding: 0 8px; font-size: 13px; }
  nav .nav-login { padding: 0 12px; margin-left: 2px; }
  nav .brand { gap: 6px; font-size: 13px; }
  nav .brand img { width: 22px; height: 22px; }
  .home-page .hero { padding-inline: 18px; }
  .home-footer { padding-inline: 14px; }
  .beian { gap: 7px 10px; }
  .beian .divider { display: none; }
  .auth-card { padding: 30px 22px; }
  .commerce-main { padding: 100px 15px 50px; }
  .pricing-grid, .support-layout, .commerce-links, .support-help { grid-template-columns: 1fr; }
  .docs-grid { grid-template-columns: 1fr; }
  .price-card { min-height: 285px; }
  .support-card { padding: 22px 18px; }
  .admin-grid { grid-template-columns: 1fr; }
  .admin-wide { grid-column: auto; }
  .admin-panel-head { flex-direction: column; }
  .admin-audit-row { grid-template-columns: 1fr; gap: 2px; }
  .hero-route-links { gap: 18px; }
}

@media (min-width: 601px) and (max-width: 900px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}