:root {
  --bg: #f3f7fb;
  --bg-elevated: #ffffff;
  --bg-muted: #e4eef7;
  --fg: #122033;
  --fg-muted: #5b6b7d;
  --brand: #1d4ed8;
  --brand-strong: #2563eb;
  --brand-soft: #dbeafe;
  --accent: #0e7490;
  --accent-soft: #cffafe;
  --border: rgba(18, 32, 51, 0.1);
  --ring: rgba(29, 78, 216, 0.4);
  --shadow: 0 24px 60px rgba(18, 50, 90, 0.09);
  --ok: #047857;
  --err: #b91c1c;
  --hero-from: #0a1628;
  --hero-via: #0f1f38;
  --hero-to: #12263f;
  --max: 72rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; }
body {
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-strong); }
button, input, textarea { font: inherit; }
.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 640px) {
  .wrap { padding: 0 2rem; }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4rem;
}
@media (min-width: 640px) {
  .header-inner { height: 4.5rem; }
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--fg);
  white-space: nowrap;
}
.brand:hover { color: var(--fg); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.7rem;
  background: linear-gradient(135deg, var(--brand-strong), var(--accent));
  box-shadow: 0 8px 20px color-mix(in srgb, var(--brand) 35%, transparent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0;
}
.nav-main {
  display: none;
  flex: 1;
  justify-content: center;
  gap: 1.75rem;
}
.nav-main a,
.nav-a {
  color: var(--fg-muted);
  font-size: 0.875rem;
  transition: color 0.15s;
}
.nav-main a:hover,
.nav-a:hover { color: var(--fg); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.875rem;
}
.nav-links .email {
  display: none;
  color: var(--fg-muted);
  font-size: 0.8rem;
}
.nav-toggle {
  display: inline-flex;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}
.nav-toggle:hover { background: var(--bg-muted); }
.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 0.75rem 1.25rem 1rem;
}
.mobile-nav a,
.mobile-nav button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.7rem 0.75rem;
  border: 0;
  border-radius: 0.6rem;
  background: transparent;
  color: var(--fg);
  font-size: 0.9rem;
}
.mobile-nav a:hover,
.mobile-nav button:hover { background: color-mix(in srgb, var(--brand) 8%, transparent); }
.site-header.is-open .mobile-nav { display: block; }
@media (min-width: 900px) {
  .nav-main { display: flex; }
  .nav-toggle { display: none; }
  .nav-links .email { display: inline; }
  .site-header.is-open .mobile-nav { display: none; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 0;
  border-radius: 0.75rem;
  padding: 0.7rem 1.15rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: 0.2s ease;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-sm { height: 2.5rem; padding: 0 1rem; }
.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover { background: var(--brand-strong); color: #fff; }
.btn-ghost {
  background: var(--bg-elevated);
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: color-mix(in srgb, var(--brand) 35%, var(--border)); color: var(--brand); }
.btn-hero {
  background: linear-gradient(90deg, var(--brand), var(--brand-strong));
  color: #fff;
  box-shadow: 0 8px 28px color-mix(in srgb, var(--brand) 50%, transparent);
}
.btn-hero:hover { color: #fff; transform: translateY(-1px); }
.btn-hero-ghost {
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  background: rgba(255, 255, 255, 0.03);
  color: #e2e8f0;
  backdrop-filter: blur(6px);
}
.btn-hero-ghost:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(180deg, var(--hero-from) 0%, var(--hero-via) 65%, var(--hero-to) 100%);
}
.hero-grid {
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    linear-gradient(rgba(125, 211, 252, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 211, 252, 0.25) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero-glow {
  pointer-events: none;
  position: absolute;
  inset: 0;
}
.hero-glow::before,
.hero-glow::after {
  content: "";
  position: absolute;
  width: 60%;
  height: 60%;
  filter: blur(80px);
}
.hero-glow::before {
  top: -20%;
  left: -15%;
  background: radial-gradient(circle, color-mix(in srgb, var(--brand) 45%, transparent), transparent 65%);
}
.hero-glow::after {
  right: -10%;
  bottom: -20%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 40%, transparent), transparent 60%);
}
.hero-inner {
  position: relative;
  display: grid;
  gap: 2.5rem;
  padding: 3.5rem 0 4rem;
  align-items: center;
}
@media (min-width: 980px) {
  .hero-inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    padding: 5rem 0 5.5rem;
    gap: 3rem;
  }
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--accent);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff, #fff 55%, var(--accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-flow {
  margin: 1rem 0 0;
  font-size: 0.95rem;
  font-weight: 550;
  color: color-mix(in srgb, var(--accent-soft) 88%, white);
}
.hero .lead {
  margin: 0.9rem 0 0;
  max-width: 28rem;
  color: rgba(203, 213, 225, 0.92);
  font-size: 0.95rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.window {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  background: linear-gradient(180deg, rgba(16, 28, 48, 0.95), rgba(10, 20, 34, 0.98));
  box-shadow: 0 32px 96px rgba(8, 24, 56, 0.6), inset 0 0 0 1px rgba(125, 211, 252, 0.08);
}
.window::before {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  border-radius: inherit;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 50%, transparent), transparent 30%, transparent 70%, color-mix(in srgb, var(--brand) 40%, transparent));
  opacity: 0.45;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--brand-soft) 15%, transparent);
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 15%, transparent), transparent);
}
.traffic { width: 0.62rem; height: 0.62rem; border-radius: 999px; }
.t-r { background: #ff5f57; }
.t-y { background: #febc2e; }
.t-g { background: #28c840; }
.window-title {
  margin-left: 0.6rem;
  font-size: 0.75rem;
  color: var(--accent);
}
.window-body { display: flex; min-height: 18rem; }
.window-side {
  width: 5.2rem;
  padding: 0.7rem 0.4rem;
  border-right: 1px solid color-mix(in srgb, var(--brand-soft) 10%, transparent);
  background: color-mix(in srgb, var(--brand) 8%, #0a1422);
}
.side-item {
  padding: 0.4rem 0.2rem;
  text-align: center;
  font-size: 0.62rem;
  color: rgba(148, 163, 184, 0.8);
  border-radius: 0.4rem;
}
.side-item.on {
  background: color-mix(in srgb, var(--brand) 45%, transparent);
  color: #fff;
}
.window-main { flex: 1; padding: 0.9rem; }
.window-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.7rem;
  font-size: 0.8rem;
  color: #e2e8f0;
}
.mini-tag {
  border-radius: 0.3rem;
  padding: 0.15rem 0.45rem;
  font-size: 0.65rem;
  background: color-mix(in srgb, var(--accent) 28%, transparent);
  color: color-mix(in srgb, var(--accent-soft) 90%, white);
}
.step-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.45rem;
  padding: 0.5rem 0.65rem;
  border-radius: 0.65rem;
  border: 1px solid color-mix(in srgb, var(--brand-soft) 12%, transparent);
  background: color-mix(in srgb, var(--brand) 8%, #0d1828);
}
.step-row.last {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, #0d1828);
}
.step-n {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
}
.step-row.last .step-n { background: var(--accent); }
.step-row strong { display: block; font-size: 0.78rem; color: #f1f5f9; }
.step-row span { font-size: 0.68rem; color: #94a3b8; }

.section {
  position: relative;
  padding: 4.5rem 0;
}
@media (min-width: 768px) {
  .section { padding: 6rem 0; }
}
.section-muted { background: var(--bg-muted); }
.section-head {
  max-width: 40rem;
  margin: 0 auto 2.75rem;
  text-align: center;
}
.section-head.left {
  margin: 0 0 1.75rem;
  text-align: left;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--brand) 20%, transparent);
  background: color-mix(in srgb, var(--brand) 5%, transparent);
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 550;
}
.pill .dot { background: var(--brand); }
h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.lead {
  margin: 0.85rem 0 0;
  color: var(--fg-muted);
  font-size: 1.05rem;
}
.grid-2 {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 900px) {
  .grid-2 { grid-template-columns: 1.05fr 0.95fr; gap: 3rem; }
}
.grid-4, .grid-3, .feat-grid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 640px) {
  .grid-4, .feat-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 980px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .feat-grid { grid-template-columns: repeat(3, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.card, .hero-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.35rem;
  box-shadow: 0 10px 30px rgba(18, 50, 90, 0.04);
}
.feat {
  position: relative;
  height: 100%;
  overflow: hidden;
  padding: 1.4rem;
  border-radius: 0.9rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 80%, transparent);
  transition: 0.25s ease;
}
.feat:hover {
  border-color: color-mix(in srgb, var(--brand) 30%, var(--border));
  box-shadow: 0 18px 40px color-mix(in srgb, var(--brand) 8%, transparent);
}
.feat-num {
  display: block;
  margin-bottom: 0.85rem;
  font-size: 1.7rem;
  font-weight: 750;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--brand) 40%, transparent);
}
.feat h3 { margin: 0; font-size: 1.05rem; }
.feat p { margin: 0.65rem 0 0; color: var(--fg-muted); font-size: 0.9rem; }
.feat-bar {
  margin-top: 1.1rem;
  height: 2px;
  width: 2rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transition: width 0.3s;
}
.feat:hover .feat-bar { width: 100%; }

.mini {
  padding: 0.85rem 0.95rem;
  border-radius: 0.85rem;
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  background: color-mix(in srgb, var(--bg-elevated) 70%, transparent);
}
.mini .n {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--brand);
}
.mini h3 { margin: 0.25rem 0 0; font-size: 0.92rem; }
.mini p { margin: 0.3rem 0 0; font-size: 0.8rem; color: var(--fg-muted); }

.path {
  border-radius: 1.4rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 90%, transparent);
  padding: 1.6rem 1.4rem;
  box-shadow: var(--shadow);
}
.path-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.2rem;
}
.path-top p {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 650;
}
.path-top h3 { margin: 0.2rem 0 0; font-size: 1.15rem; }
.path ol { list-style: none; margin: 0; padding: 0; position: relative; }
.path ol::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--brand), color-mix(in srgb, var(--accent) 70%, var(--brand)), transparent);
}
.path li {
  position: relative;
  display: flex;
  gap: 1rem;
  padding-bottom: 1.2rem;
}
.path li:last-child { padding-bottom: 0; }
.path .n {
  position: relative;
  z-index: 1;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 0 0 4px var(--bg-elevated);
}
.path li:last-child .n { background: var(--accent); }
.path small { color: var(--fg-muted); font-size: 0.7rem; font-weight: 650; }
.path strong { display: block; font-size: 0.92rem; }
.path p { margin: 0.3rem 0 0; font-size: 0.86rem; color: var(--fg-muted); }

.benefit {
  position: relative;
  padding-left: 1rem;
}
.benefit::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), color-mix(in srgb, var(--accent) 80%, transparent));
}
.benefit h3 { margin: 0; font-size: 1rem; }
.benefit p { margin: 0.45rem 0 0; font-size: 0.88rem; color: var(--fg-muted); }

.faq { display: grid; gap: 0.7rem; max-width: 48rem; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--bg-elevated);
  padding: 0.15rem 1rem;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 0.95rem 0;
  font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq details p {
  margin: 0 0 1rem;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

.page {
  padding: 2rem 0 4rem;
}
.narrow { max-width: 28rem; margin: 0 auto; }
.wide { max-width: 58rem; margin: 0 auto; }
.page-title { font-size: 1.6rem; margin: 0 0 0.4rem; letter-spacing: -0.03em; }
label { display: block; font-size: 0.82rem; color: var(--fg-muted); margin-bottom: 0.85rem; }
input, .md-box {
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  background: #fff;
  color: var(--fg);
}
input:focus, .md-box:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border));
  box-shadow: 0 0 0 3px var(--ring);
}
.msg { display: none; border-radius: 0.7rem; padding: 0.7rem 0.85rem; margin-bottom: 0.9rem; font-size: 0.85rem; }
.msg.err { display: block; background: #fef2f2; color: var(--err); }
.msg.ok { display: block; background: #ecfdf5; color: var(--ok); }
.msg.run { display: block; background: var(--brand-soft); color: var(--brand); }
.progress {
  display: none;
  height: 6px;
  margin-top: 12px;
  border-radius: 999px;
  background: var(--bg-muted);
  overflow: hidden;
}
.progress.show { display: block; }
.progress > span {
  display: block;
  height: 100%;
  width: 40%;
  background: var(--brand);
  border-radius: 999px;
  animation: progress-slide 1.2s ease-in-out infinite;
}
@keyframes progress-slide {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(320%); }
}
.keybox {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  background: #0b1b33;
  color: #d7e6ff;
  border-radius: 0.8rem;
  padding: 0.9rem;
  font-size: 1rem;
  letter-spacing: 0.04em;
  word-break: break-all;
}
.pay-row { display: flex; flex-wrap: wrap; gap: 0.65rem; margin-top: 0.75rem; }
.qr { width: 220px; height: 220px; object-fit: contain; background: #fff; border: 1px solid var(--border); border-radius: 0.8rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 0.82rem;
}
.chip:hover { background: #c7dbfe; text-decoration: none; }
.chip-wrap { display: inline-flex; align-items: center; }
.chip-wrap .chip { border-radius: 999px 0 0 999px; }
.chip-x {
  border: 0;
  background: #c7dbfe;
  color: var(--brand);
  border-radius: 0 999px 999px 0;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
  font-size: 0.82rem;
  line-height: 1;
}
.chip-x:hover { background: #fee2e2; color: var(--err); }
.add-row { display: flex; gap: 0.5rem; margin: 0.65rem 0 0.9rem; }
.add-row input { margin: 0; flex: 1; }
.query-list { margin: 0; padding-left: 1.15rem; color: var(--fg-muted); font-size: 0.9rem; }
.query-list li { margin: 0.35rem 0; }
.md-box {
  min-height: 320px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  resize: vertical;
  background: #fbfcfe;
}
.resume-list { display: grid; gap: 0.5rem; margin: 0.75rem 0; }
.resume-item {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  cursor: pointer;
  background: #fff;
}
.resume-item.active { border-color: var(--brand); background: #f3f8ff; }
.resume-item small { color: var(--fg-muted); }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-muted);
  padding: 2.5rem 0 2rem;
  color: var(--fg-muted);
  font-size: 0.85rem;
}
.footer-grid {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}
.site-footer .brand { margin-bottom: 0.6rem; }
.site-footer p { margin: 0; }
.site-footer nav { display: grid; gap: 0.4rem; }
.site-footer h4 {
  margin: 0 0 0.6rem;
  color: var(--fg);
  font-size: 0.8rem;
}
.site-footer a { color: var(--fg-muted); }
.site-footer a:hover { color: var(--fg); }