/* ===== 设计变量 ===== */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --text: #14161a;
  --text-soft: #4a5260;
  --muted: #6b7482;
  --border: #e3e6eb;
  --border-strong: #cfd5de;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --star: #c2820a;
  --bili: #e0628b;
  --ok: #147d5b;
  --warn: #9a5b00;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1116;
    --surface: #171b22;
    --surface-2: #1e232c;
    --text: #e9ecf1;
    --text-soft: #c2c9d4;
    --muted: #939eae;
    --border: #262c36;
    --border-strong: #333b47;
    --accent: #6ea8fe;
    --accent-soft: #1b2739;
    --star: #e0b048;
    --bili: #f08aae;
    --ok: #4ecb9a;
    --warn: #e0b048;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px -16px rgba(0, 0, 0, .6);
  }
}

:root[data-theme="dark"] {
  --bg: #0e1116; --surface: #171b22; --surface-2: #1e232c; --text: #e9ecf1;
  --text-soft: #c2c9d4; --muted: #939eae; --border: #262c36; --border-strong: #333b47;
  --accent: #6ea8fe; --accent-soft: #1b2739; --star: #e0b048; --bili: #f08aae;
  --ok: #4ecb9a; --warn: #e0b048;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px -16px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ===== 顶栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
}

.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(140deg, var(--accent), #7c4dff);
  color: #fff; font-weight: 700; font-size: 15px;
  display: grid; place-items: center; flex: none;
}
.brand h1 { margin: 0; font-size: 17px; line-height: 1.2; letter-spacing: -.01em; }
.brand p { margin: 2px 0 0; font-size: 12px; color: var(--muted); }

.segmented {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.segmented button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-soft);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  cursor: pointer;
}
.segmented button[aria-pressed="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.icon-button {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 7px 13px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.icon-button:hover { border-color: var(--border-strong); color: var(--text); }

/* ===== 布局 ===== */
.layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.sidebar h2 {
  margin: 2px 4px 10px;
  font-size: 12px;
  text-transform: none;
  letter-spacing: .04em;
  color: var(--muted);
  font-weight: 700;
}
.cat-nav { display: flex; flex-direction: column; gap: 2px; }
.cat-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 13.5px;
}
.cat-nav a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); }
.cat-nav a[aria-current="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.cat-nav .nav-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
  background: var(--surface-2);
  border-radius: 999px;
  padding: 1px 7px;
}
.cat-nav a[aria-current="true"] .nav-count { background: transparent; color: var(--accent); }

.content { min-width: 0; }

/* ===== 工具条 ===== */
.toolbar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  margin-bottom: 16px;
}
.field { display: flex; align-items: center; gap: 8px; }
.field label { font-size: 12.5px; color: var(--muted); }
.field input[type="search"],
.field select {
  font: inherit;
  font-size: 13.5px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  min-width: 150px;
}
.field input[type="search"]:focus, .field select:focus { background: var(--surface); }
.switch { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-soft); cursor: pointer; }
.stat-line { margin-left: auto; font-size: 12.5px; color: var(--muted); }
.stat-line strong { color: var(--text); font-weight: 600; }

/* ===== 提示条 ===== */
.notice {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 13.5px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
}
.notice[data-kind="warn"] { border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); background: color-mix(in srgb, var(--warn) 8%, var(--surface)); }
.notice[data-kind="error"] { border-color: var(--border-strong); background: var(--surface-2); }
.notice strong { color: var(--text); }

/* ===== 分区 ===== */
.section { margin-bottom: 34px; scroll-margin-top: 88px; }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.section-head h2 { margin: 0; font-size: 19px; letter-spacing: -.01em; }
.section-head .emoji { font-size: 20px; }
.section-head .desc { margin: 0; font-size: 13px; color: var(--muted); }
.section-head .badge {
  font-size: 12px; font-weight: 600; color: var(--accent);
  background: var(--accent-soft); border-radius: 999px; padding: 2px 10px;
}
.section-head .more { margin-left: auto; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 14px;
}

/* ===== 卡片 ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow);
}
.card-top { display: flex; gap: 10px; align-items: flex-start; }
.card-avatar {
  width: 34px; height: 34px; border-radius: 8px; flex: none;
  background: var(--surface-2); object-fit: cover;
}
.card-title { min-width: 0; flex: 1; }
.card-title h3 { margin: 0; font-size: 15.5px; line-height: 1.35; letter-spacing: -.01em; }
.card-title h3 a { color: var(--text); }
.card-title h3 a:hover { color: var(--accent); }
.card-owner { font-weight: 400; color: var(--muted); font-size: 13px; }
.card-metrics { display: flex; gap: 12px; font-size: 12.5px; color: var(--muted); flex: none; }
.card-metrics span { display: inline-flex; align-items: center; gap: 4px; }
.card-metrics .star { color: var(--star); font-weight: 600; }

.desc-zh { margin: 0; font-size: 14px; color: var(--text-soft); }
.desc-en {
  margin: 0; font-size: 12.5px; color: var(--muted);
  border-left: 2px solid var(--border); padding-left: 9px;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.tag {
  font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: var(--surface-2); color: var(--text-soft); border: 1px solid var(--border);
}
.meta-row { display: flex; flex-wrap: wrap; gap: 10px; font-size: 12px; color: var(--muted); align-items: center; }
.lang-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; background: var(--border-strong); }

/* 教程区 */
.tutorials {
  border-top: 1px dashed var(--border);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.tutorials-title {
  display: flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 600; color: var(--bili);
}
.tutorials-title .note { font-weight: 400; color: var(--muted); }
.tut-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.tut-list li { font-size: 13px; line-height: 1.45; }
.tut-list a { color: var(--text); }
.tut-list a:hover { color: var(--bili); }
.tut-meta { display: block; font-size: 11.5px; color: var(--muted); margin-top: 1px; }
.tut-empty { font-size: 12.5px; color: var(--muted); }

/* ===== 账号与收藏 ===== */
.auth { display: flex; align-items: center; gap: 8px; position: relative; }
.auth-login {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--text); color: var(--surface);
  border: 1px solid var(--text); border-radius: 999px;
  padding: 7px 14px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.auth-login:hover { opacity: .88; text-decoration: none; }
.auth-login--warn { background: var(--surface); color: var(--warn); border-color: var(--border-strong); font-weight: 500; }
.auth-user {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 999px; padding: 4px 12px 4px 4px; cursor: pointer;
  font: inherit; font-size: 13px; color: var(--text);
}
.auth-user img { width: 26px; height: 26px; border-radius: 50%; display: block; }
.auth-user .auth-name { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.auth-panel {
  position: absolute; top: calc(100% + 10px); right: 0; width: 330px; z-index: 40;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px;
  font-size: 13px;
}
.auth-panel h2 { margin: 0 0 4px; font-size: 14px; }
.auth-panel .row { display: flex; align-items: center; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.auth-panel .sep { border-top: 1px solid var(--border); margin: 12px 0 0; padding-top: 12px; }
.auth-panel .hint { color: var(--muted); font-size: 12px; line-height: 1.5; margin: 6px 0 0; }
.auth-panel input[type="text"], .auth-panel input[type="search"] {
  font: inherit; font-size: 13px; padding: 6px 9px; min-width: 0; flex: 1;
  color: var(--text); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.auth-panel code {
  display: inline-block; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 2px 7px; font-size: 12.5px; letter-spacing: .04em;
}
.state-badge {
  font-size: 11.5px; font-weight: 600; border-radius: 999px; padding: 2px 9px;
  border: 1px solid var(--border); color: var(--muted); background: var(--surface-2);
}
.state-badge[data-state="ok"] { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.state-badge[data-state="pending"] { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }

.fav-btn {
  appearance: none; cursor: pointer; flex: none;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
  width: 30px; height: 30px; border-radius: 8px; font-size: 15px; line-height: 1;
}
.fav-btn:hover { color: var(--star); border-color: var(--border-strong); }
.fav-btn[aria-pressed="true"] { color: var(--star); border-color: color-mix(in srgb, var(--star) 45%, var(--border)); background: color-mix(in srgb, var(--star) 10%, var(--surface)); }

/* Star 增长曲线 */
.trend { display: flex; align-items: center; gap: 9px; margin-top: 2px; }
.spark { flex: none; }
.spark-line { fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.spark-area { fill: color-mix(in srgb, var(--accent) 13%, transparent); }
.spark--projected .spark-line { stroke: var(--muted); stroke-dasharray: 4 3; }
.spark--projected .spark-area { fill: color-mix(in srgb, var(--muted) 10%, transparent); }
.trend-label { font-size: 11.5px; color: var(--muted); line-height: 1.4; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  z-index: 60; max-width: min(92vw, 460px);
  background: var(--text); color: var(--surface);
  border-radius: 10px; padding: 10px 16px; font-size: 13.5px;
  box-shadow: var(--shadow);
}
.toast[data-kind="error"] { background: #b3261e; color: #fff; }

@media (max-width: 900px) {
  .auth { order: 3; }
  .auth-panel { position: fixed; left: 12px; right: 12px; top: 72px; width: auto; }
}

/* ===== 个人主页 / 收藏页 ===== */
.layout--single { grid-template-columns: minmax(0, 1fr); }

.profile-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-bottom: 22px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center;
}
.profile-avatar { width: 64px; height: 64px; border-radius: 16px; background: var(--surface-2); }
.profile-main { flex: 1; min-width: 220px; }
.profile-main h2 { margin: 0 0 2px; font-size: 19px; letter-spacing: -.01em; }
.profile-main .login { color: var(--muted); font-size: 13.5px; }
.profile-stats { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 10px; font-size: 13px; color: var(--text-soft); }
.profile-stats strong { color: var(--text); }
.profile-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.fav-tools { margin-left: auto; flex-wrap: wrap; }
.fav-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
  display: flex; flex-direction: column; gap: 9px;
}
.fav-card .card-top { align-items: flex-start; }
.fav-saved { font-size: 11.5px; color: var(--muted); margin-left: auto; white-space: nowrap; }
.fav-remove {
  appearance: none; cursor: pointer; flex: none;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
  height: 28px; padding: 0 10px; border-radius: 8px; font: inherit; font-size: 12.5px;
}
.fav-remove:hover { color: #b3261e; border-color: var(--border-strong); }

@media (max-width: 900px) {
  .fav-tools { margin-left: 0; width: 100%; }
}

/* ===== 骨架屏与页脚 ===== */
.skeleton-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; height: 190px;
}
.skeleton-line {
  height: 12px; border-radius: 6px; background: var(--surface-2);
  margin-bottom: 10px; animation: pulse 1.4s ease-in-out infinite;
}
.skeleton-line:nth-child(1) { width: 45%; }
.skeleton-line:nth-child(2) { width: 90%; }
.skeleton-line:nth-child(3) { width: 75%; }
.skeleton-line:nth-child(4) { width: 60%; }
@keyframes pulse { 0%, 100% { opacity: .55; } 50% { opacity: 1; } }

.site-footer {
  max-width: 1440px; margin: 0 auto; padding: 26px 20px 40px;
  border-top: 1px solid var(--border); color: var(--muted); font-size: 12.5px;
}
.site-footer p { margin: 0 0 6px; }
.site-footer a { color: var(--text-soft); }

@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; max-height: none; }
  .cat-nav { flex-direction: row; flex-wrap: wrap; }
  .cat-nav a { border: 1px solid var(--border); }
  .stat-line { margin-left: 0; width: 100%; }
}