:root {
  --color-primary: #111827;
  --color-primary-hover: #030712;
  --color-accent: #2563eb;
  --color-surface: #ffffff;
  --color-page: #f9fafb;
  --color-aside: #f3f4f6;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-subtle: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;
  --color-price: #111827;
  --color-danger: #dc2626;
  --color-warn: #d97706;
  --color-ring: #2563eb;
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--color-text);
  background: var(--color-page);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--color-text);
  background: var(--color-page);
}

.page-shell {
  display: grid;
  place-content: center;
  min-height: 100vh;
  padding: 40px 20px;
}

.auth-layout {
  width: min(100vw - 40px, 520px);
  padding: 46px 54px 38px;
  border: 1px solid var(--color-border);
  border-radius: 22px;
  background: var(--color-surface);
  box-shadow: 0 18px 50px rgba(17, 24, 39, .08);
}

.product-heading {
  display: flex;
  align-items: center;
  gap: 15px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--color-subtle);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .13em;
}

h1 {
  margin: 0;
  color: var(--color-text);
  font-size: clamp(24px, 5vw, 31px);
  line-height: 1.2;
}

.intro {
  margin: 23px 0 26px;
  color: var(--color-muted);
  font-size: 15px;
}

.auth-form { display: grid; gap: 10px; }

label {
  margin-top: 6px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 650;
}

input {
  width: 100%;
  height: 51px;
  border: 1px solid var(--color-border-strong);
  border-radius: 12px;
  padding: 0 15px;
  outline: none;
  color: var(--color-text);
  background: var(--color-surface);
  font: inherit;
  transition: border-color .16s, box-shadow .16s;
}

input::placeholder { color: var(--color-subtle); }

input:focus {
  border-color: var(--color-ring);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .14);
}

button {
  width: 100%;
  min-height: 51px;
  margin-top: 16px;
  border: 0;
  border-radius: 12px;
  color: white;
  background: var(--color-primary);
  box-shadow: 0 8px 18px rgba(17, 24, 39, .12);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

button:hover { background: var(--color-primary-hover); }
button:focus-visible { outline: 3px solid rgba(37, 99, 235, .3); outline-offset: 3px; }

.switch-link, .legal {
  color: var(--color-muted);
  text-align: center;
  font-size: 14px;
}

.switch-link { margin: 24px 0 0; }
.legal { margin: 26px 0 -70px; }

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.alert {
  margin: -8px 0 17px;
  border: 1px solid rgba(220, 38, 38, .22);
  border-radius: 10px;
  padding: 11px 13px;
  color: var(--color-danger);
  background: rgba(220, 38, 38, .06);
  font-size: 14px;
}

.account-detail {
  display: grid;
  gap: 7px;
  margin-top: 30px;
  border: 1px solid var(--color-border);
  border-radius: 13px;
  padding: 16px;
}

.account-detail span { color: var(--color-muted); font-size: 13px; }
.account-detail strong { overflow-wrap: anywhere; }

.success-note {
  margin-top: 15px;
  border-radius: 11px;
  padding: 13px;
  color: var(--color-text);
  background: var(--color-aside);
  font-size: 14px;
}

.secondary-button {
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  background: var(--color-surface);
  box-shadow: none;
}

.secondary-button:hover {
  color: var(--color-text);
  background: var(--color-aside);
}

.home-shell {
  width: min(1180px, calc(100% - 48px));
  min-height: 100vh;
  margin: 0 auto;
}

.site-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 82px;
  border-bottom: 1px solid var(--color-border);
}

.wordmark {
  width: max-content;
  color: var(--color-text);
  font-size: 21px;
  font-weight: 850;
  letter-spacing: -.04em;
}

.wordmark:hover { text-decoration: none; }

.nav-links, .nav-actions {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-actions { justify-content: flex-end; gap: 20px; }

.nav-links a, .nav-login, .nav-account {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-links a:hover, .nav-login:hover, .nav-account:hover {
  color: var(--color-text);
  text-decoration: none;
}

.nav-register {
  border-radius: 9px;
  padding: 10px 17px;
  color: white;
  background: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
}

.nav-register:hover { background: var(--color-primary-hover); text-decoration: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  align-items: center;
  gap: clamp(50px, 8vw, 110px);
  min-height: 620px;
  padding: 80px 0 92px;
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 25px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}

.hero-kicker span {
  width: 25px;
  height: 2px;
  background: var(--color-accent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(44px, 5.2vw, 72px);
  line-height: 1.08;
  letter-spacing: -.065em;
}

.hero h1 em {
  color: var(--color-muted);
  font-style: normal;
  font-weight: 780;
}

.hero-summary {
  max-width: 570px;
  margin: 28px 0 0;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 34px;
}

.home-primary, .home-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border-radius: 10px;
  padding: 0 23px;
  font-size: 15px;
  font-weight: 750;
}

.home-primary {
  color: white;
  background: var(--color-primary);
}

.home-primary:hover {
  color: white;
  background: var(--color-primary-hover);
  text-decoration: none;
}

.home-secondary {
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  background: var(--color-surface);
}

.home-secondary:hover { background: var(--color-aside); text-decoration: none; }

.hero-note {
  margin: 18px 0 0;
  color: var(--color-subtle);
  font-size: 12px;
}

.product-preview {
  overflow: hidden;
  border: 1px solid var(--color-border-strong);
  border-radius: 20px;
  background: var(--color-surface);
  box-shadow: 24px 28px 0 var(--color-aside), 0 28px 70px rgba(17, 24, 39, .12);
  transform: rotate(1.2deg);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 58px;
  border-bottom: 1px solid var(--color-border);
  padding: 0 20px;
}

.preview-toolbar strong { font-size: 14px; }

.preview-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-primary);
}

.preview-status {
  margin-left: auto;
  color: var(--color-subtle);
  font-size: 11px;
}

.preview-body { padding: 24px; }

.preview-search {
  display: flex;
  align-items: center;
  height: 51px;
  border: 1px solid var(--color-border-strong);
  border-radius: 10px;
  padding-left: 16px;
  color: var(--color-muted);
  font-size: 14px;
}

.preview-search b {
  display: grid;
  place-items: center;
  align-self: stretch;
  min-width: 76px;
  margin-left: auto;
  border-radius: 0 9px 9px 0;
  color: white;
  background: var(--color-primary);
  font-size: 13px;
}

.preview-label {
  margin: 23px 0 10px;
  color: var(--color-subtle);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
}

.platform-list { border-top: 1px solid var(--color-border); }

.platform-list div {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  min-height: 57px;
  border-bottom: 1px solid var(--color-border);
}

.platform-index { color: var(--color-subtle); font-size: 11px; }
.platform-list strong { font-size: 14px; }
.platform-list small { color: var(--color-subtle); font-size: 9px; letter-spacing: .12em; }

.preview-foot {
  display: flex;
  justify-content: space-between;
  margin-top: 22px;
  color: var(--color-muted);
  font-size: 11px;
}

.preview-foot strong { color: var(--color-accent); }

.platform-section {
  padding: 31px 0 50px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.pricing-section {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  align-items: end;
  gap: 70px;
  padding: 100px 0;
  border-bottom: 1px solid var(--color-border);
}

.pricing-section .section-caption { margin-bottom: 18px; }

.pricing-section h2 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(30px, 4vw, 45px);
  letter-spacing: -.045em;
}

.pricing-section > p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.75;
}

.section-caption {
  margin: 0 0 20px;
  color: var(--color-subtle);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .14em;
}

.platform-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 5vw, 60px);
}

.platform-strip span {
  color: var(--color-text);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 800;
  letter-spacing: -.04em;
}

.platform-strip i { width: 4px; height: 4px; border-radius: 50%; background: var(--color-border-strong); }

.workflow-section { padding: 105px 0 115px; }

.workflow-section > header { max-width: 550px; }

.workflow-section h2, .home-cta h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 45px);
  letter-spacing: -.045em;
}

.workflow-section > header > p:last-child {
  margin: 18px 0 0;
  color: var(--color-muted);
  line-height: 1.7;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 55px;
  border-top: 1px solid var(--color-border-strong);
}

.workflow-grid article {
  min-height: 220px;
  padding: 28px 34px 28px 0;
}

.workflow-grid article + article {
  border-left: 1px solid var(--color-border);
  padding-left: 34px;
}

.workflow-grid article > span { color: var(--color-accent); font-size: 12px; font-weight: 800; }
.workflow-grid h3 { margin: 50px 0 10px; font-size: 19px; }
.workflow-grid p { margin: 0; color: var(--color-muted); font-size: 14px; line-height: 1.7; }

.home-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-radius: 22px;
  padding: 48px 52px;
  color: white;
  background: var(--color-primary);
}

.home-cta .section-caption { color: var(--color-subtle); }
.home-cta h2 { max-width: 700px; }

.home-primary.inverse {
  flex: 0 0 auto;
  color: var(--color-primary);
  background: var(--color-surface);
}

.home-primary.inverse:hover { background: var(--color-aside); }

.site-footer {
  display: flex;
  justify-content: space-between;
  padding: 35px 0 45px;
  color: var(--color-subtle);
  font-size: 12px;
}

.site-footer strong { color: var(--color-text); font-size: 14px; }

@media (max-width: 560px) {
  .page-shell { align-content: start; padding: 20px 14px; }
  .auth-layout { width: 100%; padding: 32px 24px 28px; border-radius: 20px; }
  .legal { margin-bottom: 0; }

  .home-shell { width: min(100% - 28px, 1180px); }
  .site-nav { grid-template-columns: 1fr auto; min-height: 68px; }
  .nav-links { display: none; }
  .nav-actions { gap: 13px; }
  .nav-login { display: none; }
  .nav-register { padding: 9px 13px; }
  .hero { grid-template-columns: 1fr; gap: 58px; min-height: 0; padding: 68px 0 86px; }
  .hero h1 { font-size: clamp(41px, 13vw, 56px); }
  .hero-summary { font-size: 16px; }
  .product-preview { box-shadow: 12px 14px 0 var(--color-aside), 0 18px 50px rgba(17, 24, 39, .1); transform: none; }
  .preview-body { padding: 18px; }
  .platform-section { padding-top: 28px; }
  .workflow-section { padding: 80px 0; }
  .pricing-section { grid-template-columns: 1fr; gap: 24px; padding: 75px 0; }
  .workflow-grid { grid-template-columns: 1fr; }
  .workflow-grid article { min-height: 170px; padding: 25px 0; }
  .workflow-grid article + article { border-top: 1px solid var(--color-border); border-left: 0; padding-left: 0; }
  .workflow-grid h3 { margin-top: 34px; }
  .home-cta { align-items: flex-start; flex-direction: column; padding: 35px 28px; }
  .home-cta .home-primary { width: 100%; }
}

@media (min-width: 561px) and (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 680px; }
  .product-preview { width: min(520px, 80%); justify-self: center; }
}