/* Pinterest 收藏 · 官网样式
   零依赖:系统字体 + 主题变量;浅色/深色跟随系统,也可手动切换。 */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f7f5f8;
  --surface: #ffffff;
  --surface-2: #f2eff4;
  --text: #161219;
  --text-soft: #453f4a;
  --muted: #6e6473;
  --line: #e9e3ee;
  --line-strong: #d7cedd;
  --brand: #b32c48;
  --brand-strong: #8e1f3a;
  --brand-soft: #fceff2;
  --on-brand: #ffffff;
  --ok: #2f9e6b;
  --shadow: 0 24px 70px rgba(22, 18, 25, 0.1);
  --shadow-sm: 0 8px 24px rgba(22, 18, 25, 0.06);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: #0f0d11;
    --bg-soft: #151218;
    --surface: #191520;
    --surface-2: #211b28;
    --text: #f4eef3;
    --text-soft: #c9bdc7;
    --muted: #9d8f9f;
    --line: #2a2430;
    --line-strong: #3a3142;
    --brand: #d4576f;
    --brand-strong: #e5788c;
    --brand-soft: #2a1a20;
    --on-brand: #1a0d12;
    --ok: #4fc08d;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0f0d11;
  --bg-soft: #151218;
  --surface: #191520;
  --surface-2: #211b28;
  --text: #f4eef3;
  --text-soft: #c9bdc7;
  --muted: #9d8f9f;
  --line: #2a2430;
  --line-strong: #3a3142;
  --brand: #d4576f;
  --brand-strong: #e5788c;
  --brand-soft: #2a1a20;
  --on-brand: #1a0d12;
  --ok: #4fc08d;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.35);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--brand-strong);
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

p {
  margin: 0;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

code,
pre {
  font-family: var(--mono);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 16px;
}

.wrap {
  width: min(var(--maxw), calc(100% - 48px));
  margin-inline: auto;
}

@media (max-width: 560px) {
  .wrap {
    width: min(var(--maxw), calc(100% - 32px));
  }
}

/* ---------- 顶部导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

.brand span small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 9px;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav a:hover {
  background: var(--surface-2);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.lang-switch a,
.lang-switch span {
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
}

.lang-switch span {
  background: var(--surface-2);
  color: var(--text);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  background: var(--surface-2);
  color: var(--text);
}

@media (max-width: 860px) {
  .site-nav {
    display: none;
  }

  .site-header .wrap {
    height: 58px;
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) 0 clamp(36px, 6vw, 72px);
  background: linear-gradient(180deg, var(--bg-soft), var(--bg) 78%);
  background:
    radial-gradient(900px 480px at 12% -8%, color-mix(in srgb, var(--brand) 16%, transparent), transparent 65%),
    linear-gradient(180deg, var(--bg-soft), var(--bg) 78%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(2.15rem, 4.6vw, 3.55rem);
  font-weight: 750;
}

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

.hero-lead {
  margin-top: 18px;
  max-width: 34em;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.35vw, 1.14rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--brand);
  color: var(--on-brand);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--brand-strong);
  color: var(--on-brand);
}

.btn-ghost {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--text);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 13px;
}

.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-meta li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line-strong);
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 界面示意 ---------- */

.mock {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.mock-dots {
  display: inline-flex;
  gap: 6px;
}

.mock-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--line-strong);
}

.mock-dots i:nth-child(1) { background: #f26d6d; }
.mock-dots i:nth-child(2) { background: #f4bf4f; }
.mock-dots i:nth-child(3) { background: #5dc47a; }

.mock-url {
  flex: 1;
  height: 22px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 10.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
}

.mock-body {
  display: grid;
  grid-template-columns: 36% minmax(0, 1fr);
  min-height: 380px;
}

.mock-left {
  padding: 12px 10px;
  border-right: 1px solid var(--line);
  background: var(--surface-2);
}

.mock-left-head {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
}

.mock-count {
  padding: 0 6px;
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
}

.mock-plus {
  margin-left: auto;
  color: var(--muted);
  font-size: 14px;
}

.mock-chips {
  display: flex;
  gap: 5px;
  margin-top: 10px;
  font-size: 10px;
  color: var(--muted);
}

.mock-chips span {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface);
}

.mock-chips .is-on {
  background: var(--text);
  color: var(--bg);
}

.mock-search {
  margin-top: 9px;
  height: 24px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--muted);
  font-size: 10px;
  display: flex;
  align-items: center;
}

.mock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  margin-top: 10px;
}

.mock-card {
  height: 84px;
  border-radius: 9px;
  background: var(--surface-2);
  background: linear-gradient(150deg, color-mix(in srgb, var(--brand) 22%, var(--surface-2)), var(--surface));
  border: 1px solid var(--line);
}

.mock-card:nth-child(2n) {
  height: 68px;
}

.mock-right {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.mock-address {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 42px;
  padding: 0 10px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 10.5px;
  overflow: hidden;
}

.mock-address .field {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
  height: 26px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.mock-ph {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.mock-ico {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
}

.mock-ico-lead {
  opacity: 0.7;
}

.mock-tag {
  flex: 0 0 auto;
  padding: 1px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 9.5px;
  line-height: 1.55;
}

.mock-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.mock-account {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 30px;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  font-size: 10.5px;
  color: var(--muted);
}

.mock-avatar {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--brand), var(--brand-strong));
}

.mock-name {
  color: var(--text);
  font-weight: 700;
}

.mock-on {
  color: var(--ok);
  font-weight: 600;
}

.mock-feed {
  flex: 1;
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  align-content: start;
}

.mock-pin {
  position: relative;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  background: linear-gradient(160deg, color-mix(in srgb, var(--brand) 14%, var(--surface-2)), var(--surface-2));
  height: 128px;
}

.mock-pin:nth-child(2) { height: 104px; }
.mock-pin:nth-child(3) { height: 140px; }
.mock-pin:nth-child(4) { height: 96px; }
.mock-pin:nth-child(5) { height: 126px; }
.mock-pin:nth-child(6) { height: 112px; }

.mock-save {
  position: absolute;
  left: 6px;
  bottom: 6px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--brand);
  color: var(--on-brand);
  font-size: 9.5px;
  font-weight: 700;
}

.mock-save-on {
  background: color-mix(in srgb, var(--text) 82%, transparent);
  color: var(--bg);
}

.mock-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 5px;
  border-radius: 50%;
  background: var(--ok);
  vertical-align: 1px;
}

.mock-note {
  position: absolute;
  right: 10px;
  bottom: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  color: var(--muted);
  font-size: 10px;
  backdrop-filter: blur(6px);
}

@media (max-width: 620px) {
  .mock-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .mock-left {
    display: none;
  }
}

/* ---------- 通用区块 ---------- */

.section {
  padding: clamp(56px, 9vw, 104px) 0;
}

.section-soft {
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.section-head {
  max-width: 44rem;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.section-head h2 {
  margin-top: 14px;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 720;
}

.section-head p {
  margin-top: 12px;
  color: var(--text-soft);
}

/* ---------- 功能 ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.feature {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.feature:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
}

.feature h3 {
  margin-top: 14px;
  font-size: 1.02rem;
  font-weight: 680;
}

.feature p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

/* ---------- 三步 ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.step::before {
  counter-increment: step;
  content: '0' counter(step);
  display: block;
  color: var(--brand);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.step h3 {
  margin-top: 8px;
  font-size: 1.02rem;
  font-weight: 680;
}

.step p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

/* ---------- 安装 ---------- */

.install-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

@media (max-width: 900px) {
  .install-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.install-copy h2 {
  margin-top: 14px;
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  font-weight: 720;
}

.install-copy p {
  margin-top: 12px;
  color: var(--text-soft);
}

.install-notes {
  margin-top: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.install-notes li {
  display: flex;
  gap: 9px;
}

.install-notes li::before {
  content: '›';
  color: var(--brand);
  font-weight: 700;
}

.code-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.code-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.copy-btn {
  margin-left: auto;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-soft);
  font: inherit;
  font-size: 11.5px;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

.code-card pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  color: var(--text);
  font-size: 12.5px;
  line-height: 1.75;
}

.code-card .cmt {
  color: var(--muted);
}

/* ---------- 推广 ---------- */

.promo {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.promo img {
  width: 64px;
  height: 64px;
  border-radius: 15px;
  flex: 0 0 auto;
  box-shadow: var(--shadow-sm);
}

.promo-copy {
  flex: 1;
  min-width: 0;
}

.promo-copy strong {
  display: block;
  font-size: 1.02rem;
  font-weight: 680;
}

.promo-copy p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13.5px;
}

@media (max-width: 640px) {
  .promo {
    flex-wrap: wrap;
  }
}

/* ---------- FAQ ---------- */

.faq {
  display: grid;
  gap: 10px;
  max-width: 52rem;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
}

.faq summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  font-weight: 620;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  margin-left: auto;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  transition: transform 0.15s ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq .answer {
  padding: 0 18px 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.faq .answer p + p {
  margin-top: 8px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  padding: clamp(40px, 6vw, 64px) 0 32px;
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 0.8fr));
  gap: 28px;
}

@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.footer-brand p {
  margin-top: 10px;
  max-width: 30rem;
  color: var(--muted);
  font-size: 13.5px;
}

.footer-col h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-col ul {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--text-soft);
  font-size: 14px;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}

@media (max-width: 520px) {
  .site-header .wrap {
    gap: 10px;
  }

  .brand span small {
    display: none;
  }

  .brand span {
    font-size: 14px;
  }

  .header-actions {
    gap: 6px;
  }

  .lang-switch a,
  .lang-switch span {
    padding: 3px 8px;
    font-size: 11px;
  }

  .theme-toggle {
    width: 30px;
    height: 30px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }
}

@media (max-width: 560px) {
  .mock-address .mock-actions,
  .mock-address .mock-tag {
    display: none;
  }
}