:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --surface: #ffffff;
  --surface-2: #f1f3f9;
  --border: #e5e8f0;
  --border-strong: #d6dbe7;
  --text: #0f172a;
  --muted: #535d73;
  --faint: #7d879c;
  --violet: #6d4dff;
  --blue: #2f6bff;
  --grad-text: linear-gradient(120deg, #6d4dff 0%, #4f5dff 45%, #1f7bff 100%);
  --grad-btn: linear-gradient(135deg, #6d4dff 0%, #2f6bff 100%);
  --ok: #059669;
  --amber: #b45309;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px -8px rgba(15, 23, 42, 0.08);
  --shadow: 0 24px 60px -24px rgba(30, 41, 90, 0.25);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html.modal-open { overflow: hidden; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: rgba(109, 77, 255, 0.18); }

a { color: inherit; text-decoration: none; }
img, svg { display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.01em; }
p { margin: 0; }
button { font: inherit; color: inherit; }

:focus-visible { outline: 2px solid var(--violet); outline-offset: 3px; border-radius: 8px; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ic {
  width: 20px; height: 20px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.sr-copy { position: fixed; top: -1000px; left: 0; opacity: 0; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 820px; }
.muted { color: var(--faint); font-size: 13px; }

/* ---------- 背景 ---------- */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.glow { position: absolute; border-radius: 50%; filter: blur(80px); }
.g1 { width: 640px; height: 640px; left: -200px; top: -260px; background: radial-gradient(circle, rgba(109, 77, 255, 0.22), transparent 65%); }
.g2 { width: 600px; height: 600px; right: -200px; top: 40px; background: radial-gradient(circle, rgba(56, 189, 248, 0.2), transparent 65%); }
.g3 { width: 720px; height: 720px; left: 30%; top: 1400px; background: radial-gradient(circle, rgba(109, 77, 255, 0.1), transparent 65%); }
.grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, #000 25%, transparent 75%);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: var(--radius-sm); border: 1px solid transparent;
  font-weight: 600; font-size: 15px; line-height: 1.2; white-space: nowrap; cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, opacity 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 9px 14px; font-size: 14px; border-radius: 10px; }
.btn-lg { padding: 15px 26px; font-size: 16px; border-radius: 14px; }
.btn-primary {
  background: var(--grad-btn); color: #fff;
  box-shadow: 0 10px 24px -10px rgba(79, 70, 229, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn-primary:hover { box-shadow: 0 16px 32px -12px rgba(79, 70, 229, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.25); }
.btn-ghost { background: #fff; border-color: var(--border-strong); color: var(--text); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: #c3cadb; background: #fbfcff; }
.btn-light { background: #fff; color: #1e1b4b; box-shadow: 0 12px 28px -12px rgba(15, 23, 42, 0.35); }
.btn:disabled, .btn.is-disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }

.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px;
  background: #fff; border: 1px solid var(--border); cursor: pointer; color: var(--text);
}

/* ---------- 导航 ---------- */
.nav { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid transparent; transition: border-color 0.3s; }
.nav::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(246, 247, 251, 0.7);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  transition: background-color 0.3s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav.scrolled::before, .nav.open::before { background: rgba(255, 255, 255, 0.88); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand-mark { width: 30px; height: 30px; }
.brand.small { font-size: 15px; }
.brand.small .brand-mark { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 4px; margin-left: 12px; }
.nav-links a { padding: 8px 12px; border-radius: 8px; color: var(--muted); font-size: 14.5px; transition: color 0.2s, background-color 0.2s; }
.nav-links a:hover { color: var(--text); background: rgba(15, 23, 42, 0.05); }
.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.lang {
  display: inline-flex; align-items: center; gap: 4px; padding: 8px 12px; border-radius: 10px;
  background: #fff; border: 1px solid var(--border); cursor: pointer; font-size: 13.5px; color: var(--faint);
}
.lang .active { color: var(--text); font-weight: 700; }
.lang .sep { opacity: 0.5; }
.show-sm { display: none; }

/* ---------- 首屏 ---------- */
.hero { padding: 72px 0 40px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px 6px 10px; border-radius: 999px;
  background: #fff; border: 1px solid var(--border); font-size: 13px; color: var(--muted); box-shadow: var(--shadow-sm);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); animation: pulse 2.4s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}
.hero h1 { margin-top: 22px; font-size: clamp(40px, 6vw, 66px); font-weight: 800; line-height: 1.08; letter-spacing: -0.025em; }
.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { margin-top: 20px; font-size: 18px; color: var(--muted); max-width: 540px; }
.hero-price { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px 10px; margin-top: 28px; }
.price-main { font-size: 44px; font-weight: 800; letter-spacing: -0.02em; }
.price-unit { color: var(--muted); }
.price-alt {
  margin-left: 4px; padding: 4px 12px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: #075985; background: #e0f2fe; border: 1px solid #bae6fd;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.stats { display: grid; grid-template-columns: repeat(4, auto); justify-content: start; gap: 12px 36px; margin: 40px 0 0; padding: 0; list-style: none; }
.stats li { display: flex; flex-direction: column; }
.stats b { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.stats small { font-size: 14px; margin-left: 2px; font-weight: 600; }
.stats li > span { font-size: 13px; color: var(--faint); }

.hero-visual { position: relative; display: grid; place-items: center; min-height: 460px; padding: 40px 0; }
.acct-card {
  position: relative; width: min(100%, 400px); padding: 28px; border-radius: 26px;
  background: linear-gradient(160deg, #ffffff, #f7f8ff);
  border: 1px solid var(--border);
  box-shadow: 0 40px 80px -30px rgba(49, 46, 129, 0.35), 0 1px 0 rgba(255, 255, 255, 0.9) inset;
  animation: float 7s ease-in-out infinite;
}
.acct-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(140deg, rgba(109, 77, 255, 0.55), transparent 40%, transparent 60%, rgba(47, 107, 255, 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.acct-card::after {
  content: ""; position: absolute; inset: 15% 5% -12%; z-index: -1; border-radius: 50%;
  background: radial-gradient(circle, rgba(109, 77, 255, 0.28), transparent 70%); filter: blur(40px);
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.acct-top { display: flex; justify-content: space-between; align-items: center; }
.acct-region { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; transition: opacity 0.25s, transform 0.25s; }
.acct-region.swap { opacity: 0; transform: translateY(-4px); }
.acct-status { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ok); font-weight: 600; }
.acct-label { margin-top: 36px; font-size: 13px; color: var(--faint); letter-spacing: 0.08em; text-transform: uppercase; }
.acct-mail { margin-top: 6px; font-family: var(--mono); font-size: 20px; letter-spacing: 0.02em; color: #1e293b; }
.acct-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 28px; }
.acct-grid div { padding: 12px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--border); }
.acct-grid small { display: block; font-size: 12px; color: var(--faint); }
.acct-grid b { font-size: 16px; }
.acct-foot { display: flex; align-items: center; gap: 8px; margin-top: 22px; font-size: 13px; color: var(--muted); }
.acct-foot .ic { width: 18px; height: 18px; color: var(--violet); }
.float-chip {
  position: absolute; display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 14px;
  font-size: 13.5px; font-weight: 600; background: #fff; border: 1px solid var(--border);
  box-shadow: 0 16px 36px -16px rgba(30, 41, 90, 0.35);
}
.float-chip .ic { width: 18px; height: 18px; color: var(--blue); }
.chip-a { top: 28px; right: 0; animation: float 6s ease-in-out infinite reverse; }
.chip-b { bottom: 0; left: 0; animation: float 8s ease-in-out infinite; }

.code {
  display: inline-grid; place-items: center; min-width: 40px; height: 40px; padding: 0 8px; border-radius: 12px;
  font-size: 13px; font-weight: 800; letter-spacing: 0.06em; color: #4338ca;
  background: linear-gradient(145deg, #eef2ff, #e0f2fe); border: 1px solid #c7d2fe;
}
.code.lg { min-width: 56px; height: 56px; border-radius: 16px; font-size: 16px; }
.code .ic { width: 20px; height: 20px; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head.left { text-align: left; margin-left: 0; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-head h2 { margin-top: 10px; font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.02em; }
.section-head p { margin-top: 14px; color: var(--muted); }

.features { padding-top: 32px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature {
  padding: 26px 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.feature:hover { border-color: #c7d2fe; transform: translateY(-3px); box-shadow: var(--shadow); }
.f-icon {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: #4338ca;
  background: linear-gradient(145deg, #eef2ff, #e0f2fe); border: 1px solid #c7d2fe;
}
.feature h3 { margin-top: 18px; font-size: 17px; }
.feature p { margin-top: 8px; color: var(--muted); font-size: 14.5px; }

/* ---------- 商品 ---------- */
.region-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.region-grid.single { grid-template-columns: 1fr; max-width: 920px; margin: 0 auto; }
.region-card {
  position: relative; display: flex; flex-direction: column; padding: 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.region-card:hover { transform: translateY(-4px); border-color: #c7d2fe; box-shadow: var(--shadow); }
.region-card.is-out { opacity: 0.6; }
.region-card.other { border-style: dashed; box-shadow: none; }
.rc-top { display: flex; justify-content: space-between; align-items: center; }
.stock { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.stock::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.stock.ok { color: var(--ok); background: #ecfdf5; }
.stock.out { color: var(--amber); background: #fffbeb; }
.region-card h3 { margin-top: 18px; font-size: 19px; }
.region-card p { margin-top: 4px; color: var(--muted); font-size: 14px; }
.rc-bottom { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: auto; padding-top: 22px; }
.rc-price { font-size: 22px; font-weight: 800; letter-spacing: -0.01em; }
.rc-price small { font-size: 13px; font-weight: 500; color: var(--faint); }

.product-card {
  position: relative; display: grid; grid-template-columns: 1.35fr 0.9fr; border-radius: 26px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.product-card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--grad-btn);
}
.pc-main { padding: 36px; }
.pc-head { display: flex; align-items: center; gap: 16px; }
.pc-head h3 { font-size: 24px; font-weight: 800; }
.pc-head p { margin-top: 2px; color: var(--muted); font-size: 15px; }
.pc-points { margin: 28px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.pc-points li { display: flex; align-items: center; gap: 12px; font-size: 15.5px; }
.pc-points .ic {
  width: 24px; height: 24px; padding: 4px; border-radius: 50%; color: #fff; background: var(--grad-btn); stroke-width: 2.4;
}
.pc-side {
  display: flex; flex-direction: column; align-items: stretch; justify-content: center; gap: 10px; padding: 36px;
  background: linear-gradient(180deg, #f8f9ff, #f1f4ff); border-left: 1px solid var(--border);
}
.pc-side .stock { align-self: flex-start; }
.pc-price { font-size: 48px; font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }
.pc-price small { font-size: 16px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.pc-alt { color: var(--muted); font-size: 15px; margin-bottom: 8px; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0; padding: 0; list-style: none; }
.step { position: relative; padding: 26px 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.step-no { display: block; font-size: 34px; font-weight: 800; letter-spacing: -0.02em; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.step h3 { margin-top: 10px; font-size: 17px; }
.step p { margin-top: 8px; color: var(--muted); font-size: 14.5px; }

/* ---------- 教程 ---------- */
.guide-body { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 24px; align-items: start; }
.guide-steps { margin: 0; padding: 8px; list-style: none; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.guide-steps li { display: flex; gap: 16px; padding: 18px; }
.guide-steps li + li { border-top: 1px solid var(--border); }
.g-no {
  display: grid; place-items: center; flex: none; width: 32px; height: 32px; border-radius: 50%;
  background: var(--grad-btn); font-weight: 700; font-size: 14px; color: #fff;
}
.guide-steps h4 { font-size: 16px; }
.guide-steps p { margin-top: 4px; color: var(--muted); font-size: 14.5px; }
.warn-card { padding: 24px; border-radius: var(--radius); background: #fffbeb; border: 1px solid #fcd34d; }
.warn-head { display: flex; align-items: center; gap: 10px; color: var(--amber); font-size: 16px; }
.warn-card ul { margin: 14px 0 0; padding-left: 18px; color: #78350f; font-size: 14.5px; }
.warn-card li + li { margin-top: 10px; }
.warn-card b { color: #451a03; }

/* ---------- 常见问题 ---------- */
.accordion { border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-sm); }
.accordion details + details { border-top: 1px solid var(--border); }
.accordion summary {
  position: relative; padding: 20px 56px 20px 24px; cursor: pointer; list-style: none; font-weight: 600; font-size: 16px;
  transition: background-color 0.2s;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: ""; position: absolute; right: 24px; top: 50%; width: 10px; height: 10px; margin-top: -7px;
  border-right: 2px solid var(--faint); border-bottom: 2px solid var(--faint); transform: rotate(45deg); transition: transform 0.25s;
}
.accordion details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.accordion summary:hover { background: #fafbfe; }
.accordion details p { padding: 0 24px 22px; color: var(--muted); font-size: 15px; }

/* ---------- 条款 ---------- */
.terms { margin: 0; padding: 8px 24px; list-style: none; counter-reset: term; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.terms li { position: relative; counter-increment: term; padding: 16px 0 16px 40px; color: var(--muted); font-size: 15px; }
.terms li + li { border-top: 1px solid var(--border); }
.terms li::before {
  content: counter(term); position: absolute; left: 0; top: 16px; display: grid; place-items: center; width: 26px; height: 26px;
  border-radius: 8px; font-size: 13px; font-weight: 700; color: #4338ca; background: #eef2ff;
}

/* ---------- 联系 ---------- */
.cta-band {
  position: relative; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  padding: 44px 48px; border-radius: 28px; overflow: hidden; color: #fff;
  background: linear-gradient(120deg, #6d4dff 0%, #4f5dff 45%, #2f6bff 100%);
  box-shadow: 0 30px 60px -30px rgba(79, 70, 229, 0.7);
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; top: -120px; width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.25), transparent 70%); pointer-events: none;
}
.cta-band h2 { font-size: clamp(24px, 3.2vw, 32px); font-weight: 800; }
.cta-band p { margin-top: 8px; color: #e0e7ff; }

/* ---------- 页脚 ---------- */
.footer { padding: 36px 0 56px; border-top: 1px solid var(--border); background: rgba(255, 255, 255, 0.6); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; }
.footer-inner .muted:first-of-type { flex: 1; min-width: 240px; }

.fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 40; display: grid; place-items: center; width: 54px; height: 54px;
  border-radius: 50%; background: var(--grad-btn); color: #fff; box-shadow: 0 14px 30px -10px rgba(79, 70, 229, 0.7);
  transition: transform 0.2s;
}
.fab:hover { transform: scale(1.06); }
.fab .ic { width: 24px; height: 24px; }
.fab.is-disabled { opacity: 0.6; }

/* ---------- 下单弹窗 ---------- */
.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute; inset: 0; background: rgba(15, 23, 42, 0.45);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); opacity: 0; transition: opacity 0.2s;
}
.modal-panel {
  position: relative; width: 100%; max-width: 560px; max-height: calc(100vh - 40px); overflow-y: auto; overscroll-behavior: contain;
  padding: 28px; border-radius: 24px; background: var(--panel); border: 1px solid var(--border);
  box-shadow: 0 40px 100px -30px rgba(15, 23, 42, 0.5);
  opacity: 0; transform: translateY(16px) scale(0.98); transition: opacity 0.2s, transform 0.2s;
}
.modal.show .modal-backdrop { opacity: 1; }
.modal.show .modal-panel { opacity: 1; transform: none; }
.modal-close { position: absolute; top: 18px; right: 18px; }
.modal-panel h2 { font-size: 22px; font-weight: 800; }
.co-block { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--border); }
.co-block:first-of-type { border-top: 0; padding-top: 0; }
.co-step { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.co-step > span:first-child {
  display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; font-size: 13px; font-weight: 700;
  background: var(--grad-btn); color: #fff;
}
.net-badge { margin-left: auto; padding: 3px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 700; color: #047857; background: #ecfdf5; border: 1px solid #a7f3d0; }
.co-row { display: grid; grid-template-columns: 1fr auto; gap: 14px; }
.co-row.single { grid-template-columns: 1fr; }
.co-fixed { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field[hidden] { display: none; }
.field-label { font-size: 13px; color: var(--faint); }
.select-wrap { position: relative; }
.select-wrap select {
  width: 100%; height: 44px; padding: 0 40px 0 14px; border-radius: var(--radius-sm); appearance: none; -webkit-appearance: none;
  background: #fff; border: 1px solid var(--border-strong); color: var(--text); font: inherit; font-size: 15px; cursor: pointer;
}
.select-wrap .ic { position: absolute; right: 12px; top: 12px; pointer-events: none; color: var(--muted); }
.stepper { display: inline-flex; align-self: flex-start; align-items: center; height: 44px; border-radius: var(--radius-sm); background: #fff; border: 1px solid var(--border-strong); }
.stepper button { display: grid; place-items: center; width: 42px; height: 100%; background: none; border: 0; cursor: pointer; color: var(--text); }
.stepper button:disabled { opacity: 0.3; cursor: not-allowed; }
.stepper output { min-width: 32px; text-align: center; font-weight: 700; }
.co-total { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 16px; padding: 14px 16px; border-radius: 14px; background: #f5f3ff; border: 1px solid #ddd6fe; }
.co-total > span:first-child { color: var(--muted); font-size: 14px; }
.co-amount { font-size: 15px; font-weight: 600; }
.co-amount b { font-size: 26px; font-weight: 800; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.co-amount small { color: var(--faint); font-weight: 500; }
.pay { display: grid; grid-template-columns: 148px 1fr; gap: 18px; align-items: center; }
.qr { width: 148px; height: 148px; padding: 10px; border-radius: 14px; background: #fff; border: 1px solid var(--border); }
.qr svg { width: 100%; height: 100%; }
.pay-info { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; min-width: 0; }
.addr {
  display: block; width: 100%; padding: 10px 12px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border);
  font-family: var(--mono); font-size: 13.5px; line-height: 1.5; word-break: break-all; user-select: all;
}
.note { display: flex; gap: 8px; margin-top: 14px; font-size: 13.5px; color: var(--muted); }
.note.warn { color: var(--amber); }
.note .ic { width: 18px; height: 18px; margin-top: 2px; }
.order-code { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--border); font-size: 14px; color: var(--muted); }
.order-code code { font-family: var(--mono); font-size: 16px; font-weight: 700; color: var(--text); letter-spacing: 0.04em; }
.co-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.co-actions .btn { flex: 1 1 200px; }

.toast {
  position: fixed; left: 50%; bottom: 32px; z-index: 200; padding: 10px 18px; border-radius: 999px;
  background: #0f172a; color: #fff; font-size: 14px; box-shadow: var(--shadow);
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none; transition: opacity 0.25s, transform 0.25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero-inner { grid-template-columns: 1fr; gap: 24px; }
  .hero-visual { min-height: 380px; }
  .feature-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .region-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-body { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; display: none; flex-direction: column; gap: 2px; margin: 0; padding: 10px 16px 16px;
    background: #fff; border-bottom: 1px solid var(--border); box-shadow: 0 24px 40px -20px rgba(15, 23, 42, 0.25);
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a { padding: 12px; font-size: 16px; }
  .show-sm { display: inline-grid; }
  .hide-sm { display: none; }
  .product-card { grid-template-columns: 1fr; }
  .pc-side { border-left: 0; border-top: 1px solid var(--border); }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 64px 0; }
  .hero { padding: 40px 0 16px; }
  .lead { font-size: 16px; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .hero-cta .btn { flex: 1 1 100%; }
  .hero-visual { min-height: 340px; padding: 36px 0; }
  .acct-card { padding: 22px; }
  .acct-mail { font-size: 17px; }
  .float-chip { font-size: 12.5px; padding: 8px 12px; }
  .chip-a { top: 0; right: 0; }
  .chip-b { bottom: 0; left: 0; }
  .feature-grid, .steps { grid-template-columns: 1fr; }
  .region-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .region-grid.single { grid-template-columns: 1fr; }
  .region-card { padding: 16px; }
  .region-card h3 { margin-top: 14px; font-size: 17px; }
  .region-card p { font-size: 13px; }
  .region-card.other { grid-column: 1 / -1; }
  .rc-bottom { flex-direction: column; align-items: stretch; gap: 10px; padding-top: 14px; }
  .rc-bottom .btn { width: 100%; }
  .rc-price { font-size: 20px; }
  .pc-main, .pc-side { padding: 24px 20px; }
  .pc-head h3 { font-size: 21px; }
  .pc-price { font-size: 40px; }
  .cta-band { padding: 32px 24px; }
  .cta-band .btn { width: 100%; }
  .modal { padding: 0; align-items: end; }
  .modal-panel { max-width: none; max-height: 92vh; border-radius: 24px 24px 0 0; padding: 24px 18px calc(24px + env(safe-area-inset-bottom)); }
  .co-row { grid-template-columns: 1fr; }
  .pay { grid-template-columns: 1fr; justify-items: center; }
  .pay-info { align-items: stretch; width: 100%; }
  .pay-info .btn { align-self: stretch; }
  .fab { right: 16px; bottom: 16px; }
}

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