:root {
  --paper: #f7f2e8;
  --paper-deep: #eee5d6;
  --ink: #15120f;
  --muted: #6f665b;
  --line: #d8cdbc;
  --accent: #b9462f;
  --accent-dark: #7f2e21;
  --sage: #5f7057;
  --blue: #394c65;
  --white: #fffaf1;
  --shadow: 0 18px 50px rgba(40, 31, 22, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 36px;
  background: rgba(247, 242, 232, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand,
.header-left,
.top-nav,
.hero-actions,
.control-row,
.block-title,
.cover-meta,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
}

.header-left {
  gap: 12px;
}

.top-nav {
  margin-left: auto;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: block;
}

.top-nav {
  gap: 26px;
  color: var(--muted);
  font-size: 14px;
}

.auth-menu {
  position: relative;
}

.top-nav a:hover,
.site-footer a:hover {
  color: var(--accent);
}

.login-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  color: var(--white);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
}

.login-button.signed-in {
  max-width: 180px;
  overflow: hidden;
  color: var(--ink);
  background: transparent;
  border-color: var(--line);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.login-options {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 40;
  width: 150px;
  padding: 8px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.login-options a {
  display: block;
  padding: 10px;
  color: var(--ink);
  border-radius: 4px;
  font-size: 14px;
}

.login-options a:hover {
  background: var(--paper-deep);
}

.account-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 40;
  width: 230px;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.account-menu__name {
  overflow: hidden;
  color: var(--ink);
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-menu__meta {
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.account-menu button {
  width: 100%;
  min-height: 38px;
  margin-top: 12px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}

.account-menu button:hover {
  border-color: var(--ink);
}

.header-action,
.primary-link,
.secondary-link,
.generate-button,
.ghost-button,
.block-title button,
.plan-button {
  min-height: 42px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background 160ms ease,
    color 160ms ease,
    border-color 160ms ease;
}

.header-action,
.primary-link,
.generate-button,
.plan-button {
  padding: 10px 18px;
  color: var(--white);
  background: var(--ink);
}

.secondary-link,
.ghost-button,
.block-title button {
  padding: 10px 16px;
  color: var(--ink);
  background: transparent;
}

.header-action:hover,
.primary-link:hover,
.generate-button:hover,
.secondary-link:hover,
.ghost-button:hover,
.block-title button:hover,
.plan-button:hover {
  transform: translateY(-1px);
}

.header-action:hover,
.primary-link:hover,
.generate-button:hover,
.plan-button:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.plan-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  width: fit-content;
}

.plan-button.inverse {
  color: var(--ink);
  background: var(--white);
  border-color: var(--white);
}

.plan-button.inverse:hover {
  color: var(--white);
  background: var(--accent);
  border-color: var(--accent);
}

.price-card .plan-button.inverse {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.price-card .plan-button.inverse:hover {
  color: var(--white);
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

main {
  overflow: hidden;
}

.hero,
.workspace,
.content-band,
.pricing {
  padding: 74px 36px;
}

.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: flex-end;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 980px;
  margin-bottom: 26px;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(48px, 7vw, 108px);
  font-weight: 500;
  line-height: 0.96;
}

h2 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 42px;
  font-weight: 500;
  line-height: 1.08;
}

h3 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.25;
}

.hero-text {
  max-width: 720px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(160px, 0.35fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  max-width: 1220px;
  margin: 0 auto 34px;
}

.workspace {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.app-grid {
  display: grid;
  grid-template-columns: minmax(460px, 0.88fr) minmax(380px, 440px);
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.generator-panel,
.preview-panel,
.result-block,
.price-card,
.seo-grid article {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.generator-panel {
  display: grid;
  gap: 13px;
  padding: 16px 18px;
}

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

.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 6px;
}

label span {
  color: var(--muted);
  font-size: 14px;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  outline: none;
  line-height: 1.25;
}

input,
select {
  height: 46px;
}

select {
  appearance: none;
  padding-right: 34px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 12px) 50%;
  background-repeat: no-repeat;
  background-size: 6px 6px, 6px 6px;
  text-overflow: ellipsis;
}

textarea {
  min-height: 132px;
  padding-top: 11px;
  line-height: 1.45;
  resize: vertical;
}

textarea.auto-grow {
  min-height: 46px;
  max-height: 150px;
  overflow: hidden;
  resize: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 2px rgba(21, 18, 15, 0.12);
}

.control-row {
  flex-wrap: wrap;
  gap: 12px;
}

.preview-panel {
  display: block;
  padding: 18px;
  background: var(--paper-deep);
}

.cover-preview,
.quota-box {
  display: none;
}

.cover-preview {
  position: relative;
  min-height: 248px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--white);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(21, 18, 15, 0.94), rgba(57, 76, 101, 0.86)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 28px);
  border-radius: 6px;
}

.cover-preview::after {
  content: "";
  position: absolute;
  inset: auto 22px 76px 22px;
  height: 2px;
  background: var(--accent);
}

.cover-meta {
  position: relative;
  z-index: 1;
  justify-content: space-between;
  font-size: 13px;
}

.cover-preview strong {
  position: relative;
  z-index: 1;
  max-width: 260px;
  font-size: 36px;
  line-height: 0.98;
}

.cover-preview p {
  position: relative;
  z-index: 1;
  max-width: 250px;
  margin-bottom: 0;
  color: rgba(255, 250, 241, 0.78);
}

.quota-box {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.quota-box span {
  color: var(--muted);
  font-size: 14px;
}

.quota-box strong {
  display: block;
  margin: 6px 0 8px;
  font-size: 28px;
}

.quota-box p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.xhs-publish-panel {
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.xhs-panel-head,
.xhs-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.xhs-panel-head {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 14px;
}

.xhs-panel-head span {
  color: var(--ink);
  font-weight: 700;
}

.xhs-panel-head button,
.xhs-actions button {
  min-height: 34px;
  padding: 6px 10px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}

.xhs-panel-head button:hover,
.xhs-actions button:hover {
  border-color: var(--ink);
}

.xhs-preview-card,
.platform-card {
  max-height: 520px;
  overflow: hidden;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.xhs-cover {
  height: clamp(180px, 24vw, 240px);
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 18px;
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(21, 18, 15, 0.02), rgba(21, 18, 15, 0.58)),
    radial-gradient(circle at 75% 20%, rgba(255, 250, 241, 0.2), transparent 32%);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 30px;
  line-height: 1.05;
  text-align: center;
}

.xhs-cover.has-image {
  align-items: flex-end;
  justify-content: flex-start;
  color: var(--white);
  font-size: 24px;
  text-align: left;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

.xhs-cover span,
.tweet-image span,
.newsletter-hero span {
  display: inline-block;
  max-width: 92%;
  padding: 8px 10px;
  background: rgba(21, 18, 15, 0.46);
  border-radius: 4px;
}

.xhs-preview-card h3 {
  margin: 14px 16px 8px;
  font-size: 18px;
  line-height: 1.35;
}

.xhs-preview-card p {
  max-height: 210px;
  overflow: auto;
  margin: 0 16px 12px;
  color: var(--ink);
  white-space: pre-wrap;
}

.xhs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 16px 16px;
  color: var(--blue);
  font-size: 14px;
}

.xhs-actions {
  margin-top: 12px;
}

.usage-module {
  position: static;
  z-index: 1;
  width: auto;
  min-width: 0;
  margin: 0;
  padding: 6px 9px;
  background: rgba(255, 250, 241, 0.6);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.usage-module span {
  color: inherit;
  font-size: inherit;
}

.usage-module strong {
  display: block;
  margin-top: 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
}

.platform-card {
  padding: 0;
}

.platform-card p {
  margin: 0 16px 12px;
  white-space: pre-wrap;
}

.platform-card h3 {
  margin: 16px 16px 8px;
}

.platform-tags {
  margin: 0 16px 16px;
  color: var(--blue);
  font-size: 14px;
}

.tweet-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px 8px;
}

.tweet-head small {
  display: block;
  color: var(--muted);
}

.avatar {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  background: var(--ink);
  border-radius: 999px;
  font-weight: 700;
}

.tweet-image,
.video-thumb,
.newsletter-hero {
  height: clamp(160px, 22vw, 220px);
  display: flex;
  align-items: flex-end;
  padding: 18px;
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(21, 18, 15, 0.02), rgba(21, 18, 15, 0.58)),
    radial-gradient(circle at 75% 20%, rgba(255, 250, 241, 0.2), transparent 32%);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 24px;
  line-height: 1.08;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

.platform-card--bilibili h3,
.platform-card--newsletter h3 {
  margin: 16px 16px 10px;
}

.platform-card--youtube {
  display: flex;
  justify-content: center;
  padding: 18px;
  background: #171717;
}

.shorts-phone {
  width: min(260px, 100%);
  overflow: hidden;
  color: var(--white);
  background: #050505;
  border-radius: 18px;
}

.shorts-image {
  min-height: 0;
  aspect-ratio: 9 / 16;
  display: flex;
  align-items: flex-end;
  padding: 18px;
  background-color: #15120f;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.72)),
    linear-gradient(135deg, rgba(21, 18, 15, 0.92), rgba(185, 70, 47, 0.76));
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
}

.shorts-caption {
  padding: 12px 14px 16px;
}

.shorts-caption p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
  white-space: normal;
}

.platform-card--newsletter {
  padding: 20px;
}

.platform-card--newsletter small {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
}

.platform-card--newsletter p {
  margin: 14px 0 0;
}

.platform-card--x .tweet-image {
  height: clamp(150px, 20vw, 210px);
}

.platform-card--bilibili .video-thumb {
  aspect-ratio: 16 / 9;
}

.platform-card--newsletter .newsletter-hero {
  height: clamp(150px, 20vw, 210px);
}

.preview-image-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.preview-image-link:hover .xhs-cover,
.preview-image-link:hover .tweet-image,
.preview-image-link:hover .newsletter-hero {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

.preview-panel > .cover-preview,
.preview-panel > .quota-box {
  display: none;
}

.selectable-item {
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
}

.selectable-item:hover {
  color: var(--ink);
  border-color: rgba(21, 18, 15, 0.28);
}

.selectable-item.selected,
.chip-list li.selected {
  color: var(--ink);
  background: var(--white);
  border-color: var(--ink);
  box-shadow:
    inset 0 0 0 1px var(--ink),
    0 0 0 3px rgba(21, 18, 15, 0.08);
}

.chip-list li {
  cursor: pointer;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  max-width: 1220px;
  margin: 22px auto 0;
}

.result-block {
  min-height: 220px;
  padding: 22px;
}

.result-block.wide {
  grid-column: 1 / -1;
}

.block-title {
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.block-title h3 {
  margin-bottom: 0;
}

.block-title button {
  min-height: 34px;
  padding: 6px 10px;
  font-size: 13px;
}

ol {
  margin: 0;
  padding-left: 24px;
}

ol li {
  margin: 10px 0;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chip-list li {
  padding: 8px 11px;
  color: var(--ink);
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.result-text {
  color: var(--blue);
  font-size: 18px;
}

.source-paths {
  display: grid;
  gap: 10px;
  color: var(--blue);
  font-size: 16px;
  overflow-wrap: anywhere;
}

.source-paths a,
.source-paths p {
  display: block;
  margin: 0;
  padding: 10px 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: default;
}

.source-paths a:hover {
  border-color: var(--ink);
  cursor: pointer;
  text-decoration: underline;
}

.script-lines {
  display: grid;
  gap: 12px;
}

.script-lines p {
  margin: 0;
  padding: 14px;
  background: var(--white);
  border-left: 3px solid var(--accent);
}

.content-band {
  border-bottom: 1px solid var(--line);
}

.seo-grid,
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1220px;
  margin: 0 auto;
}

.seo-grid article,
.price-card {
  min-height: 220px;
  padding: 22px;
}

.price-card {
  display: flex;
  flex-direction: column;
}

.seo-grid article span,
.roadmap-list span {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
}

.seo-grid article p,
.price-card p {
  color: var(--muted);
}

.pricing {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.standalone-page {
  min-height: calc(100vh - 72px);
  padding-top: 96px;
}

.pricing-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.price-card strong {
  display: block;
  margin: 18px 0;
  font-family: "Times New Roman", Georgia, "Songti SC", serif;
  font-size: 38px;
  font-weight: 500;
  font-variant-numeric: lining-nums proportional-nums;
  font-feature-settings: "lnum" 1, "pnum" 1;
  letter-spacing: 0;
}

.price-card.featured {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--line);
}

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

.roadmap-list {
  display: grid;
  max-width: 1220px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.roadmap-list div {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.roadmap-list p {
  margin-bottom: 0;
  font-size: 19px;
}

.site-footer {
  justify-content: space-between;
  gap: 20px;
  padding: 28px 36px;
  color: var(--muted);
}

.site-footer p {
  margin-bottom: 0;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  min-width: 170px;
  padding: 12px 14px;
  color: var(--white);
  background: var(--ink);
  border-radius: 4px;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 20px;
  }

  .top-nav {
    display: none;
  }

  .auth-menu {
    margin-left: auto;
  }

  .hero,
  .app-grid,
  .section-heading,
  .results-grid,
  .seo-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    grid-template-columns: 1fr;
  }

  .xhs-publish-panel {
    grid-column: auto;
    grid-row: auto;
  }

  .hero,
  .workspace,
  .content-band,
  .pricing {
    padding: 52px 20px;
  }

  .hero {
    min-height: auto;
    gap: 34px;
  }

  h1 {
    font-size: 54px;
  }

  h2 {
    font-size: 34px;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 64px;
  }

  .hero,
  .workspace,
  .content-band,
  .pricing {
    padding: 42px 16px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 28px;
  }

  .hero-text,
  .roadmap-list p {
    font-size: 16px;
  }

  .two-columns,
  .roadmap-list div {
    grid-template-columns: 1fr;
  }

  .cover-preview {
    min-height: 260px;
  }

  .cover-preview strong {
    font-size: 34px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 16px;
  }
}