styles.css

:root {
  --ink: #16211d;
  --muted: #66746d;
  --line: #d8e2dc;
  --paper: #fbfcf8;
  --panel: #ffffff;
  --mint: #3ab795;
  --mint-dark: #167e67;
  --coral: #ef6f5e;
  --amber: #f2b84b;
  --sky: #4a9fd8;
  --violet: #7a6ff0;
  --shadow: 0 18px 50px rgba(31, 49, 43, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(58, 183, 149, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(74, 159, 216, 0.08) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(216, 226, 220, 0.85);
  background: rgba(251, 252, 248, 0.9);
  backdrop-filter: blur(16px);
}

.nav-shell {
  display: flex;
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  background: var(--ink);
  box-shadow: 5px 5px 0 var(--mint);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover {
  color: var(--ink);
  background: #edf6f1;
}

.section-band {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 84px 0;
}

.hero {
  display: grid;
  min-height: calc(100vh - 72px);
  align-items: center;
  gap: 48px;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.9fr);
  padding-top: 54px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--mint-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(46px, 8vw, 86px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.24;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 800;
}

.primary-action {
  color: #ffffff;
  background: var(--ink);
}

.secondary-action {
  border: 1px solid var(--line);
  background: #ffffff;
}

.hero-visual {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.browser-bar {
  display: flex;
  gap: 8px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #f4f7f3;
}

.browser-bar span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--coral);
}

.browser-bar span:nth-child(2) {
  background: var(--amber);
}

.browser-bar span:nth-child(3) {
  background: var(--mint);
}

.preview-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 18px;
}

.preview-card {
  display: flex;
  min-height: 132px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: #fbfcf8;
}

.preview-card.tall {
  min-height: 278px;
  background: #eaf8f3;
  grid-row: span 2;
}

.preview-card.wide {
  background: #fff6df;
  grid-column: span 2;
}

.preview-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.preview-card strong {
  font-size: 24px;
}

.meter {
  overflow: hidden;
  height: 9px;
  border-radius: 999px;
  background: #d8e2dc;
}

.meter i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--mint-dark);
}

.meter-fill {
  width: 72%;
}

.summary-section {
  padding-top: 36px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-heading p:last-child {
  color: var(--muted);
}

.component-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.component-strip span {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 13px;
  background: #ffffff;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 8px 24px rgba(31, 49, 43, 0.06);
}

.hook-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.hook-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(31, 49, 43, 0.07);
}

.hook-card p {
  color: var(--muted);
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.hook-tag,
.level,
.pending-pill {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  border-radius: 999px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 900;
}

.hook-tag {
  color: #063c31;
  background: #dff5ec;
}

.level {
  color: #6b4a05;
  background: #fff1cd;
}

.counter-demo,
.callback-demo,
.submit-demo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: auto 0 18px;
}

.counter-demo button,
.callback-demo button,
.record-form button,
.submit-demo button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  padding: 0 14px;
  color: #ffffff;
  background: var(--ink);
  font-weight: 800;
}

.counter-demo button {
  width: 42px;
  padding: 0;
  font-size: 20px;
}

.counter-demo strong {
  display: grid;
  width: 64px;
  height: 48px;
  place-items: center;
  border-radius: 8px;
  background: #f4f7f3;
  font-size: 24px;
}

.task-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.task-list li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
}

.task-list li::before {
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--mint);
  content: "";
}

.status-panel,
.store-demo,
.storage-demo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: auto 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #f7faf7;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 6px rgba(58, 183, 149, 0.16);
}

.status-panel small {
  display: block;
  color: var(--muted);
}

.theme-demo {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
  margin: auto 0 18px;
}

.theme-swatch {
  display: grid;
  min-height: 80px;
  place-items: center;
  border-radius: 8px;
  font-weight: 900;
}

.theme-swatch.dark {
  color: #ffffff;
  background: #18231f;
}

.theme-swatch.light {
  border: 1px solid var(--line);
  background: #fbfcf8;
}

.cart-demo {
  display: grid;
  gap: 8px;
  margin: auto 0 18px;
}

.cart-demo div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 8px;
  padding: 10px 12px;
  background: #f7faf7;
}

.cart-demo .cart-total {
  color: #ffffff;
  background: var(--mint-dark);
}

.input-demo,
.form-demo,
.record-form label {
  display: grid;
  gap: 8px;
  margin: auto 0 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.input-demo input,
.form-demo input,
.record-form input,
.record-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fbfcf8;
}

.record-form textarea {
  min-height: 92px;
  resize: vertical;
}

.form-demo small {
  color: var(--muted);
  font-weight: 500;
}

.muted-band {
  width: 100%;
  max-width: none;
  border-block: 1px solid var(--line);
  background: rgba(234, 248, 243, 0.7);
}

.muted-band > * {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.mini-table {
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr auto;
  overflow: hidden;
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.mini-table span,
.mini-table strong {
  padding: 10px;
  background: #ffffff;
}

.search-demo,
.deferred-demo,
.measure-demo,
.modal-demo,
.debug-demo,
.style-demo,
.comment-demo {
  margin-top: auto;
}

.search-demo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #ffffff;
}

.typing-line {
  overflow: hidden;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pending-pill {
  color: #063c31;
  background: #dff5ec;
}

.deferred-demo {
  display: grid;
  gap: 8px;
}

.deferred-demo div {
  border-radius: 8px;
  padding: 10px 12px;
  background: #f7faf7;
  color: var(--muted);
  font-weight: 800;
}

.measure-box {
  display: grid;
  min-height: 96px;
  place-items: center;
  border: 2px solid var(--sky);
  border-radius: 8px;
  background: #eef7fd;
  color: #175579;
  font-weight: 900;
}

.measure-ruler {
  width: 70%;
  height: 8px;
  margin-top: 12px;
  border-radius: 999px;
  background: repeating-linear-gradient(
    90deg,
    var(--sky),
    var(--sky) 8px,
    #d7ecfa 8px,
    #d7ecfa 16px
  );
}

.modal-demo,
.style-demo {
  display: grid;
  gap: 9px;
}

.modal-demo span,
.modal-demo strong,
.style-demo span,
.debug-demo code,
.store-demo,
.storage-demo {
  border-radius: 8px;
  padding: 10px 12px;
  background: #f7faf7;
}

.debug-demo code {
  display: block;
  overflow-wrap: anywhere;
  color: #31443c;
}

.style-demo span:first-child {
  color: #593a00;
  background: #fff1cd;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.form-band {
  width: 100%;
  max-width: none;
  background: #ffffff;
}

.form-band > * {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.form-layout {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.3fr 0.85fr 0.85fr;
}

.featured-card {
  background: #f7fbff;
}

.record-form {
  display: grid;
  gap: 14px;
  margin-top: auto;
}

.record-form button {
  justify-self: start;
}

.comment-demo {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border-radius: 8px;
  padding: 14px;
  background: #f7faf7;
}

.avatar {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--coral);
  font-weight: 900;
}

.comment-demo p {
  margin: 0;
}

.submit-demo {
  flex-wrap: wrap;
}

.submit-demo span {
  color: var(--muted);
  font-weight: 800;
}

.roadmap-section {
  padding-bottom: 96px;
}

.roadmap {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.roadmap li {
  display: grid;
  gap: 18px;
  grid-template-columns: 70px 1fr;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(31, 49, 43, 0.06);
}

.roadmap li > span {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  background: var(--ink);
  font-weight: 900;
}

.roadmap h3 {
  margin-bottom: 4px;
}

.roadmap p {
  margin-bottom: 0;
  color: var(--muted);
}

.footer {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 24px max(16px, calc((100% - 1180px) / 2));
  background: var(--ink);
  color: #ffffff;
}

.footer p {
  margin: 0;
}

.footer a {
  font-weight: 900;
}

@media (max-width: 980px) {
  .hero,
  .hook-grid,
  .compact-grid,
  .form-layout {
    grid-template-columns: 1fr 1fr;
  }

  .hero-content {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .nav-shell {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .section-band {
    width: min(100% - 24px, 1180px);
    padding: 58px 0;
  }

  .hero,
  .hook-grid,
  .compact-grid,
  .form-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 44px;
  }

  h1 {
    font-size: 44px;
  }

  .preview-grid,
  .theme-demo {
    grid-template-columns: 1fr;
  }

  .preview-card.tall,
  .preview-card.wide {
    min-height: 132px;
    grid-column: auto;
    grid-row: auto;
  }

  .roadmap li {
    grid-template-columns: 1fr;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}