/* ============ 设计基础 ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0b0e14;
  --bg-soft: #10141c;
  --surface: #141a24;
  --surface-2: #1a212e;
  --surface-3: #202837;
  --line: rgba(255, 255, 255, .08);
  --line-strong: rgba(255, 255, 255, .16);
  --text: #f2f6fa;
  --muted: #9aa7b5;
  --muted-2: #68758a;
  --accent: #2dd4bf;
  --accent-2: #38bdf8;
  --amber: #f5b14c;
  --violet: #a78bfa;
  --green: #34d399;
  --red: #f87171;
  --r: 8px;
  --r-sm: 6px;
  --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --shadow: 0 18px 50px rgba(0, 0, 0, .35);
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(45, 212, 191, .28); color: #fff; }
a { color: var(--accent); text-decoration: none; }
button { font: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.page-bg {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(56, 189, 248, .06), transparent 34%),
    linear-gradient(180deg, var(--bg), var(--bg-soft) 60%, var(--bg));
}
.hero-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 42%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 42%);
  opacity: .65;
}
.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  padding: 10px 16px; border-radius: var(--r-sm); background: var(--surface-3); color: var(--text);
}
.skip-link:focus { left: 8px; }

/* ============ 顶部导航 ============ */
.nav {
  position: sticky; top: 0; z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 14, 20, .82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px; height: 68px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 50%; overflow: hidden; flex-shrink: 0;
  display: grid; place-items: center;
}
.brand-mark img { width: 100%; height: 100%; object-fit: cover; }
.brand-name { white-space: nowrap; }
.brand-ver {
  padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .04);
}
.accent { color: var(--accent); }
.links { display: flex; gap: 24px; }
.links a { position: relative; color: var(--muted); font-size: 14px; font-weight: 500; transition: color .15s; padding: 6px 0; }
.links a:hover { color: var(--text); }
.links a.active { color: var(--text); }
.links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-auth { display: flex; align-items: center; gap: 10px; }
.lang-select {
  width: auto; padding: 7px 10px; font-size: 12.5px; border-radius: var(--r-sm); cursor: pointer;
}
.menu-btn {
  display: none; width: 40px; height: 40px; place-items: center; border-radius: var(--r-sm);
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--text);
}
.mobile-menu {
  display: none; flex-direction: column; gap: 2px; padding: 8px 20px 16px;
  border-top: 1px solid var(--line); background: rgba(11, 14, 20, .98);
}
.mobile-menu a, .mobile-menu .mobile-auth a {
  padding: 13px 10px; color: var(--muted); font-size: 15px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
}
.mobile-menu a:last-child, .mobile-menu .mobile-auth a:last-child { border-bottom: 0; }
.mobile-menu .mobile-auth { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 12px 0 4px; }
.mobile-menu.hidden { display: none; }

/* ============ 按钮与表单 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--r-sm); font-size: 14px; font-weight: 600;
  border: 1px solid transparent; transition: transform .12s, box-shadow .12s, background .12s, border-color .12s;
  white-space: nowrap; min-height: 40px;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--accent); color: #06231f; box-shadow: 0 8px 24px rgba(45, 212, 191, .22); }
.btn-primary:hover { background: #4de3cf; box-shadow: 0 10px 30px rgba(45, 212, 191, .32); }
.btn-cyan { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06231f; box-shadow: 0 8px 24px rgba(56, 189, 248, .22); }
.btn-cyan:hover { box-shadow: 0 12px 32px rgba(56, 189, 248, .34); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: rgba(255, 255, 255, .03); }
.btn-ghost:hover { border-color: rgba(45, 212, 191, .5); box-shadow: 0 0 0 3px rgba(45, 212, 191, .1); }
.btn-danger { border-color: rgba(248, 113, 113, .4); color: var(--red); background: rgba(248, 113, 113, .08); }
.btn-danger:hover { border-color: rgba(248, 113, 113, .65); box-shadow: 0 0 0 3px rgba(248, 113, 113, .1); }
.btn-lg { padding: 13px 26px; font-size: 15px; min-height: 48px; }
.btn-sm { padding: 7px 12px; font-size: 13px; min-height: 32px; }

input, select, textarea {
  width: 100%; padding: 11px 13px; color: var(--text);
  background: rgba(10, 14, 20, .78); border: 1px solid var(--line-strong);
  border-radius: var(--r-sm); font-size: 14px; font-family: var(--font); outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(45, 212, 191, .12); }
textarea { resize: vertical; line-height: 1.6; }
label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 6px; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 76px 0; }
.section-alt { background: rgba(255, 255, 255, .018); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 44px; }
.section-head.left { text-align: left; margin-left: 0; }
.section-head h2 { font-size: 30px; line-height: 1.25; margin-top: 12px; font-weight: 750; }
.section-head p { color: var(--muted); margin-top: 12px; line-height: 1.75; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 700; color: var(--accent); border: 1px solid rgba(45, 212, 191, .28);
  background: rgba(45, 212, 191, .07); text-transform: uppercase;
}
.eyebrow svg { width: 13px; height: 13px; }
.panel {
  border-radius: var(--r); border: 1px solid var(--line); background: var(--surface);
  padding: 26px; backdrop-filter: blur(8px);
}
.panel h2 { font-size: 22px; margin-bottom: 6px; }
.panel .sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.form-grid { display: grid; gap: 16px; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; flex-wrap: wrap; }
.hint { font-size: 12px; color: var(--muted); margin-top: 12px; line-height: 1.7; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.loading, .empty { text-align: center; color: var(--muted); padding: 60px 0; font-size: 14px; }
.loading { display: flex; align-items: center; justify-content: center; gap: 10px; }
.loading::before {
  content: ""; width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--line-strong); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ 首页 ============ */
.hero { padding: 78px 0 56px; text-align: center; position: relative; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--line-strong); color: var(--muted); background: rgba(255, 255, 255, .04);
  font-size: 13px; margin-bottom: 24px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(52, 211, 153, .5); animation: pulse 1.8s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, .5); } 70% { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); } 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); } }
.hero h1 { font-size: clamp(36px, 6.2vw, 64px); line-height: 1.12; font-weight: 800; letter-spacing: 0; }
.hero h1 .grad { background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 52%, var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { max-width: 660px; margin: 22px auto 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-actions.left { justify-content: flex-start; }
.hero-stats { margin: 46px auto 0; max-width: 780px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat-chip {
  padding: 16px; border-radius: var(--r); border: 1px solid var(--line);
  background: rgba(20, 26, 36, .72); backdrop-filter: blur(8px);
}
.stat-chip .num { font-size: 26px; font-weight: 800; color: var(--text); font-variant-numeric: tabular-nums; }
.stat-chip .lab { color: var(--muted); font-size: 12px; margin-top: 4px; }
.announce {
  display: inline-flex; align-items: center; gap: 12px; margin-bottom: 22px; padding: 9px 16px;
  border-radius: 999px; border: 1px solid rgba(52, 211, 153, .3); background: rgba(52, 211, 153, .07);
  color: #bfe8d8; font-size: 13px; max-width: 100%;
}
.ann-tag { padding: 2px 9px; border-radius: 999px; background: rgba(52, 211, 153, .18); color: var(--green); font-weight: 700; }

.app-showcase { padding: 70px 0 84px; }
.showcase-grid { display: grid; grid-template-columns: .92fr 1.18fr; gap: 44px; align-items: center; }
.showcase-text h2 { font-size: 30px; line-height: 1.3; margin-top: 12px; }
.showcase-text p { color: var(--muted); line-height: 1.8; margin-top: 14px; }
.trust-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.trust-chip {
  padding: 7px 12px; border-radius: var(--r-sm); font-size: 12.5px; color: var(--muted);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .03);
}
.trust-chip b { color: var(--text); font-weight: 600; }

.mock-dash {
  border-radius: var(--r); border: 1px solid var(--line-strong); overflow: hidden;
  background: var(--surface); box-shadow: var(--shadow), 0 0 0 1px rgba(45, 212, 191, .04);
}
.mock-top { display: flex; align-items: center; gap: 6px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.mock-dot { width: 9px; height: 9px; border-radius: 50%; }
.mock-dot.r { background: #f87171; } .mock-dot.y { background: var(--amber); } .mock-dot.g { background: var(--green); }
.mock-title { margin-left: 8px; color: var(--muted); font-size: 11.5px; }
.mock-title b { color: var(--text); font-weight: 600; }
.mock-body { display: flex; min-height: 320px; }
.mock-side { width: 86px; border-right: 1px solid var(--line); padding: 16px 10px; display: flex; flex-direction: column; gap: 10px; background: rgba(255,255,255,.015); }
.mock-menu { height: 18px; border-radius: 5px; background: rgba(255, 255, 255, .06); }
.mock-menu.active { background: linear-gradient(90deg, rgba(45, 212, 191, .35), rgba(45, 212, 191, .14)); }
.mock-main { flex: 1; padding: 16px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mock-kpi { padding: 11px; border-radius: var(--r-sm); border: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.mock-kpi b { color: var(--text); font-size: 16px; display: block; font-variant-numeric: tabular-nums; }
.mock-kpi span { color: var(--muted); font-size: 10.5px; }
.mock-chart { position: relative; flex: 1; display: flex; align-items: flex-end; gap: 7px; padding: 12px; border-radius: var(--r-sm); border: 1px solid var(--line); min-height: 110px; background: rgba(255,255,255,.015); }
.bar { width: 12%; border-radius: 3px 3px 0 0; background: linear-gradient(180deg, rgba(45, 212, 191, .85), rgba(56, 189, 248, .3)); }
.b1 { height: 42%; } .b2 { height: 64%; } .b3 { height: 50%; } .b4 { height: 78%; } .b5 { height: 58%; } .b6 { height: 88%; } .b7 { height: 70%; }
.mock-list { display: flex; flex-direction: column; gap: 6px; }
.mock-row { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: var(--r-sm); border: 1px solid var(--line); font-size: 11px; color: var(--muted); background: rgba(255,255,255,.015); }
.chip { padding: 2px 8px; border-radius: 999px; font-size: 10px; background: rgba(167, 139, 250, .14); color: var(--violet); }
.chip.tk { background: rgba(45, 212, 191, .12); color: var(--accent); }
.good { color: var(--green); margin-left: auto; }
.mock-ai {
  margin-left: auto; display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px;
  border-radius: 999px; font-size: 10px; font-weight: 700; color: var(--amber);
  border: 1px solid rgba(245, 177, 76, .35); background: rgba(245, 177, 76, .09);
}

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature {
  padding: 24px; border-radius: var(--r); border: 1px solid var(--line);
  background: var(--surface); transition: border-color .15s, box-shadow .15s, transform .15s;
}
.feature:hover { border-color: rgba(45, 212, 191, .45); transform: translateY(-3px); box-shadow: 0 14px 36px rgba(0, 0, 0, .25); }
.feature .icon {
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 16px;
  color: var(--accent); border: 1px solid rgba(45, 212, 191, .28); background: rgba(45, 212, 191, .08);
}
.feature .icon svg { width: 22px; height: 22px; }
.feature h3 { font-size: 16px; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 13.5px; line-height: 1.75; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.step { padding: 22px; border-radius: var(--r); border: 1px solid var(--line); background: var(--surface); }
.step-num {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 14px;
  font-weight: 800; color: var(--accent); border: 1px solid rgba(45, 212, 191, .4); background: rgba(45, 212, 191, .08);
}
.step h3 { font-size: 15px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 13px; line-height: 1.7; }

.faq-wrap { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq { border-radius: var(--r); border: 1px solid var(--line); background: var(--surface); overflow: hidden; }
.faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 16px 18px;
  background: transparent; border: 0; color: var(--text); font-size: 14px; font-weight: 600; text-align: left;
}
.faq-arrow { color: var(--accent); font-size: 18px; flex-shrink: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; color: var(--muted); font-size: 13px; line-height: 1.75; padding: 0 18px; }
.faq.open .faq-a { padding-bottom: 16px; }

.testimonials { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.testimonial { padding: 22px; border-radius: var(--r); border: 1px solid var(--line); background: var(--surface); }
.testimonial .quote { color: var(--muted); font-size: 13.5px; line-height: 1.8; }
.testimonial .author { display: flex; align-items: center; gap: 10px; margin-top: 16px; }
.testimonial .avatar-mini {
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 800;
  color: var(--text); background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.testimonial .author b { font-size: 13px; display: block; }
.testimonial .author span { font-size: 11.5px; color: var(--muted-2); }

.cta-band { padding: 76px 0; border-top: 1px solid var(--line); background: linear-gradient(180deg, rgba(45, 212, 191, .05), rgba(56, 189, 248, .06)); }
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: 32px; }
.cta-inner p { color: var(--muted); margin-top: 12px; line-height: 1.7; }

/* ============ 内页 ============ */
.page-hero { padding: 76px 0 54px; text-align: center; }
.page-hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.2; }
.page-hero p { max-width: 660px; margin: 16px auto 0; color: var(--muted); line-height: 1.85; }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.split-grid.gap-lg { gap: 22px; }
.help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.check-list { list-style: none; display: flex; flex-direction: column; gap: 11px; margin-top: 14px; }
.check-list li { color: var(--muted); font-size: 14px; line-height: 1.65; display: flex; gap: 10px; }
.check-list li::before { content: ""; width: 17px; height: 17px; border-radius: 50%; margin-top: 1px; flex-shrink: 0; background: rgba(52, 211, 153, .14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2334d399' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/10px no-repeat; }
.check-list li b { color: var(--text); font-weight: 600; }

.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: stretch; }
.price-card {
  border-radius: var(--r); border: 1px solid var(--line); background: var(--surface); padding: 26px; position: relative;
  display: flex; flex-direction: column; gap: 14px;
}
.price-card.hot { border-color: rgba(45, 212, 191, .5); box-shadow: 0 0 34px rgba(45, 212, 191, .12); }
.price-card .tag {
  position: absolute; top: -11px; right: 18px; padding: 4px 12px; border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06231f; font-size: 12px; font-weight: 700;
}
.price-card h3 { font-size: 17px; }
.price-card .desc { color: var(--muted); font-size: 13px; line-height: 1.65; min-height: 42px; }
.price-card .price { font-size: 30px; font-weight: 800; color: var(--accent); }
.price-card .price small { font-size: 13px; color: var(--muted); font-weight: 400; }
.price-card ul { list-style: none; display: flex; flex-direction: column; gap: 10px; font-size: 13.5px; flex: 1; }
.price-card li { display: flex; gap: 9px; color: var(--muted); line-height: 1.5; }
.price-card li::before { content: "✓"; color: var(--green); font-weight: 700; flex-shrink: 0; }
.price-card .btn { margin-top: 8px; }

.auth-layout { max-width: 470px; margin: 60px auto; }
.switch-link { text-align: center; margin-top: 18px; color: var(--muted); font-size: 14px; }
.user-card { display: flex; align-items: center; gap: 14px; }
.avatar {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 20px;
  color: var(--accent); border: 1px solid rgba(45, 212, 191, .4); background: rgba(45, 212, 191, .08);
}
.user-meta .name { font-size: 16px; font-weight: 700; display: flex; align-items: center; }
.user-meta .sub { color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 11.5px; margin-left: 8px;
  border: 1px solid rgba(167, 139, 250, .45); color: var(--violet); background: rgba(167, 139, 250, .1);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 26px; }
.stat-box { border-radius: var(--r); border: 1px solid var(--line); background: var(--surface-2); padding: 18px; }
.stat-box .num { font-size: 26px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.stat-box .lab { color: var(--muted); font-size: 12px; margin-top: 4px; }
.store-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 13px 15px; border-radius: var(--r-sm); border: 1px solid var(--line); background: rgba(255, 255, 255, .02); margin-bottom: 10px;
}
.store-row .info { display: flex; align-items: center; gap: 12px; min-width: 0; }
.platform-tag {
  padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  border: 1px solid rgba(45, 212, 191, .4); color: var(--accent); background: rgba(45, 212, 191, .08);
}
.platform-tag.p1688 { border-color: rgba(245, 177, 76, .45); color: var(--amber); background: rgba(245, 177, 76, .08); }
.download-box { text-align: center; padding: 48px 22px; }
.download-box .big { font-size: 32px; font-weight: 800; }
.download-box .meta { color: var(--muted); margin: 12px 0 26px; font-size: 14px; }
.changelog { text-align: left; max-width: 560px; margin: 26px auto 0; }
.changelog h4 { color: var(--text); font-size: 14px; margin-bottom: 10px; }
.changelog li { color: var(--muted); font-size: 13px; line-height: 2; list-style: none; }
.changelog li::before { content: "▹ "; color: var(--accent); }
.dl-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 28px 0; }
.dl-step { display: flex; align-items: center; gap: 10px; padding: 12px; border-radius: var(--r); border: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.dl-step .step-num { margin: 0; width: 28px; height: 28px; font-size: 13px; }
.dl-step span { color: var(--muted); font-size: 12.5px; text-align: left; line-height: 1.45; }
.qr-wrap { margin: 20px auto; text-align: center; }
.qr-wrap img { width: 140px; height: 140px; border-radius: var(--r-sm); border: 1px solid var(--line-strong); background: #fff; padding: 8px; }
.qr-wrap p { color: var(--muted); font-size: 12px; margin-top: 8px; }
.news-item { padding: 14px 0; border-bottom: 1px solid var(--line); }
.news-item h3 { font-size: 15px; }
.news-item p { color: var(--muted); font-size: 13px; line-height: 1.7; margin: 6px 0; }

.legal-panel { line-height: 1.95; color: var(--muted); }
.legal-panel h3 { color: var(--text); margin: 24px 0 10px; font-size: 16px; }
.legal-panel h3:first-child { margin-top: 0; }
.legal-panel p { margin-bottom: 8px; }

.agree-row { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--muted); line-height: 1.6; }
.agree-row input { width: 17px; height: 17px; margin-top: 1px; accent-color: var(--accent); cursor: pointer; flex-shrink: 0; }
.agree-hint { font-size: 12px; color: var(--amber); margin-top: -4px; }
.modal-overlay {
  position: fixed; inset: 0; background: rgba(4, 6, 10, .72); z-index: 9999;
  display: flex; align-items: center; justify-content: center; padding: 20px; backdrop-filter: blur(4px);
}
.modal {
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r);
  max-width: 640px; width: 100%; max-height: 82vh; display: flex; flex-direction: column; overflow: hidden;
  box-shadow: var(--shadow);
}
.modal-head { padding: 18px 22px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.modal-head h3 { margin: 0; font-size: 18px; }
.modal-close {
  width: 34px; height: 34px; border-radius: var(--r-sm); border: 1px solid var(--line-strong);
  background: transparent; color: var(--muted); display: grid; place-items: center; font-size: 18px; line-height: 1;
}
.modal-close:hover { color: var(--text); border-color: var(--text); }
.modal-body { padding: 20px 22px; overflow-y: auto; flex: 1; color: var(--muted); line-height: 1.85; font-size: 14px; }
.modal-foot { padding: 16px 22px; border-top: 1px solid var(--line); text-align: center; }

/* ============ 登录注册增强 ============ */
.auth-panel { padding: 30px; }
.auth-tabs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 4px;
  border: 1px solid var(--line); border-radius: var(--r); background: rgba(255, 255, 255, .02); margin-bottom: 20px;
}
.auth-tab {
  padding: 10px 12px; border: 0; border-radius: var(--r-sm); background: transparent;
  color: var(--muted); font-size: 14px; font-weight: 600; transition: background .15s, color .15s;
}
.auth-tab:hover { color: var(--text); }
.auth-tab.active { background: var(--surface-3); color: var(--text); box-shadow: 0 2px 10px rgba(0,0,0,.2); }
.auth-pane.hidden { display: none; }
.pass-field { position: relative; }
.pass-field input { padding-right: 46px; }
.eye-btn {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 36px; height: 36px; border: 0; background: transparent; color: var(--muted-2);
  display: grid; place-items: center; border-radius: var(--r-sm); transition: color .15s;
}
.eye-btn:hover { color: var(--accent); }
.eye-btn svg { width: 18px; height: 18px; }
.strength-row { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.strength-track { flex: 1; height: 6px; border-radius: 999px; background: rgba(255,255,255,.07); overflow: hidden; }
.strength-bar { height: 100%; width: 0; border-radius: 999px; transition: width .2s, background .2s; }
.strength-label { width: 44px; text-align: right; font-size: 12px; color: var(--muted); }
.pass-reqs { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 10px; }
.pass-reqs li { font-size: 12px; color: var(--muted-2); display: inline-flex; align-items: center; gap: 5px; }
.pass-reqs li::before { content: "○"; color: var(--muted-2); }
.pass-reqs li.ok { color: var(--green); }
.pass-reqs li.ok::before { content: "✓"; color: var(--green); }
.captcha-row { display: flex; gap: 10px; align-items: stretch; }
.captcha-row input { flex: 1; min-width: 0; }
.captcha-img {
  flex-shrink: 0; width: 124px; height: 44px; padding: 0; overflow: hidden; cursor: pointer;
  border: 1px solid var(--line-strong); border-radius: var(--r-sm); background: #fff;
}
.captcha-img img { width: 124px; height: 44px; object-fit: cover; display: block; }
.captcha-hint { font-size: 11.5px; color: var(--muted-2); margin-top: 6px; }
.code-row { display: flex; gap: 10px; align-items: center; }
.code-row input { flex: 1; min-width: 0; }
.code-row .btn { flex-shrink: 0; }
.auth-divider { display: flex; align-items: center; gap: 12px; color: var(--muted-2); font-size: 12px; margin: 20px 0 14px; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.third-party { display: flex; justify-content: center; }
.third-party .btn svg { width: 18px; height: 18px; color: var(--green); }
.wechat-modal .wechat-body { text-align: center; }
.wechat-qr { width: 220px; height: 220px; border-radius: var(--r-sm); border: 1px solid var(--line-strong); background: #fff; padding: 10px; margin: 6px auto 14px; }
.wechat-body p { color: var(--muted); font-size: 13px; line-height: 1.7; }
.wechat-body code { padding: 2px 7px; border-radius: 5px; background: rgba(255,255,255,.06); color: var(--accent); font-size: 12px; }
.wechat-placeholder {
  width: 64px; height: 64px; margin: 6px auto 16px; border-radius: 50%; color: var(--green);
  border: 1px solid rgba(52, 211, 153, .4); background: rgba(52, 211, 153, .08);
  display: grid; place-items: center;
}
.wechat-placeholder svg { width: 30px; height: 30px; }
.wechat-body h3 { color: var(--text); margin-bottom: 8px; }

/* ============ 页脚 ============ */
.footer { border-top: 1px solid var(--line); background: rgba(8, 11, 16, .94); margin-top: 64px; }
.footer-inner {
  max-width: 1180px; margin: 0 auto; padding: 40px 24px 30px;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.25fr; gap: 30px;
}
.footer-brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 16px; margin-bottom: 10px; }
.footer-brand .brand-mark { width: 28px; height: 28px; }
.footer p, .footer-meta { color: var(--muted); font-size: 12.5px; line-height: 1.7; }
.footer-col { display: flex; flex-direction: column; gap: 9px; }
.footer-col h4 { font-size: 14px; margin-bottom: 6px; color: var(--text); }
.footer-col a { color: var(--muted); font-size: 13px; transition: color .15s; }
.footer-col a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.social-btn {
  padding: 7px 15px; border-radius: 999px; font-size: 12.5px; color: var(--muted);
  border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .03); transition: border-color .15s, color .15s;
}
.social-btn:hover { color: var(--accent); border-color: rgba(45, 212, 191, .4); }
.footer-meta { margin-top: 14px; }
.footer-beian {
  text-align: center;
  padding: 14px 24px 18px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
}
.footer-beian a {
  color: var(--muted-2);
  transition: color .15s;
}
.footer-beian a:hover { color: var(--accent); }

/* ============ Toast ============ */
.toast {
  position: fixed; right: 22px; bottom: 22px; z-index: 999; max-width: 400px;
  padding: 13px 18px; border-radius: var(--r); font-size: 13.5px; line-height: 1.5;
  border: 1px solid var(--line-strong); background: rgba(16, 20, 28, .98); color: var(--text);
  box-shadow: var(--shadow); cursor: pointer;
}
.toast.hidden { display: none; }
.toast.err { border-color: rgba(248, 113, 113, .55); }
.toast.ok { border-color: rgba(52, 211, 153, .55); }

/* ============ 动效 ============ */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .links { display: none; }
  .menu-btn { display: grid; }
  .mobile-menu:not(.hidden) { display: flex; }
  .showcase-grid { grid-template-columns: 1fr; gap: 34px; }
  .showcase-text { text-align: center; }
  .showcase-text .hero-actions { justify-content: center; }
  .trust-bar { justify-content: center; }
  .steps { grid-template-columns: 1fr 1fr; }
  .testimonials { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .features, .pricing, .split-grid, .help-grid { grid-template-columns: 1fr; }
  .dl-steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .nav-inner { padding: 0 16px; height: 62px; }
  .brand-ver { display: none; }
  .container { padding: 0 16px; }
  .hero { padding: 58px 0 44px; }
  .hero h1 { font-size: 34px; }
  .hero-stats { grid-template-columns: 1fr; }
  .steps, .dl-steps, .features, .pricing { grid-template-columns: 1fr; }
  .section, .app-showcase { padding: 54px 0; }
  .section-head h2, .showcase-text h2, .cta-inner h2 { font-size: 25px; }
  .page-hero { padding: 54px 0 40px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .mock-body { min-height: 240px; }
  .mock-side { display: none; }
  .nav-auth .btn-ghost:first-child { display: none; }
  .nav-auth { gap: 8px; }
  .captcha-row { flex-direction: column; align-items: stretch; }
  .captcha-img { width: 100%; height: 56px; }
  .captcha-img img { width: 100%; height: 56px; object-fit: cover; }
  .code-row { flex-direction: column; align-items: stretch; }
  .code-row .btn { width: 100%; }
  .auth-panel { padding: 22px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}