/* ============================================================================
   开发文档板块（dev_docs）—— 视觉规范：Apple 式留白/大标题 + 小米式橙色点缀
   变量命名与站点一致（--bg / --card-bg / --text / --primary …），
   深色由 main_page/css/theme.css 的 [data-theme="dark"] 覆盖。
   本文件在 theme.css 之前引入。
   ========================================================================== */

/* ---------- 浅色默认值（深色由 theme.css 覆盖） ---------- */
:root {
  --bg: #fbfbfd;
  --card-bg: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: #d2d2d7;
  --primary: #0071e3;          /* 主强调色：Apple 蓝 */
  --primary-dark: #0060c0;
  --primary-light: #5ac8fa;
  --secondary: #ff6900;        /* 次强调色：小米橙 */
  --success: #1a7f37;
  --warning: #9a6700;
  --danger: #c0392b;
  --input-bg: #f5f5f7;
  --hover-bg: #f5f5f7;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .05);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, .06), 0 20px 48px rgba(0, 0, 0, .10);
  --dd-max: 1180px;
  --dd-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
             "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.dd-body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--dd-font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.dd-body::before {           /* 顶部柔和光晕，模拟 Apple 产品页底纹 */
  content: "";
  position: fixed; inset: 0 0 auto 0; height: 520px;
  background:
    radial-gradient(900px 320px at 50% -160px, rgba(0, 113, 227, .10), transparent 70%),
    radial-gradient(700px 260px at 88% -120px, rgba(255, 105, 0, .07), transparent 70%);
  pointer-events: none; z-index: 0;
}

a { color: var(--primary); text-decoration: none; }

kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px; color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: 5px;
  padding: 1px 5px; background: var(--card-bg);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .86em; padding: 2px 6px; border-radius: 6px;
  background: var(--input-bg); border: 1px solid var(--border);
  color: var(--text);
  word-break: break-all;
}

/* ============================================================================
   导航
   ========================================================================== */
.dd-nav {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  background: var(--bg);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border);
}
.dd-nav-inner {
  max-width: var(--dd-max); margin: 0 auto;
  height: 56px; padding: 0 22px;
  display: flex; align-items: center; gap: 22px;
}
.dd-brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.dd-brand-logo {
  width: 30px; height: 30px; border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--primary), var(--primary-light));
  color: #fff; font-size: 13px;
  box-shadow: 0 4px 12px rgba(0, 113, 227, .22);
}
.dd-brand-text { font-size: 15.5px; font-weight: 600; letter-spacing: -.01em; }
.dd-brand-text em {
  font-style: normal; font-size: 11px; font-weight: 600;
  letter-spacing: .08em; color: var(--secondary);
  margin-left: 6px; text-transform: uppercase;
}
.dd-nav-links { display: flex; align-items: center; gap: 20px; margin-left: 8px; }
.dd-nav-links a {
  color: var(--text-secondary); font-size: 13.5px; padding: 4px 0;
  transition: color .18s;
}
.dd-nav-links a:hover { color: var(--text); text-decoration: none; }
.dd-nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.dd-icon-btn {
  width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid transparent; background: transparent;
  color: var(--text-secondary); font-size: 13.5px; cursor: pointer;
  transition: .18s;
}
.dd-icon-btn:hover {
  color: var(--text); background: var(--hover-bg); border-color: var(--border);
  text-decoration: none;
}

/* ============================================================================
   主体
   ========================================================================== */
.dd-main {
  position: relative; z-index: 1;
  max-width: var(--dd-max); margin: 0 auto;
  padding: 0 22px 64px;
}
body.dd-locked .dd-main,
body.dd-locked .dd-footer { display: none; }

/* ---------- Hero ---------- */
.dd-hero { padding: 74px 0 46px; text-align: center; }
.dd-kicker {
  display: inline-block; font-size: 12px; font-weight: 700;
  letter-spacing: .16em; color: var(--secondary); text-transform: uppercase;
}
.dd-hero h1 {
  margin: 12px 0 14px;
  font-size: clamp(38px, 5.2vw, 60px);
  font-weight: 700; letter-spacing: -.022em; line-height: 1.06;
}
.dd-lede {
  margin: 0 auto 30px; max-width: 640px;
  font-size: clamp(15.5px, 1.4vw, 19px);
  color: var(--text-secondary); line-height: 1.55;
}

.dd-search {
  position: relative; max-width: 520px; margin: 0 auto;
  display: flex; align-items: center;
}
.dd-search > i {
  position: absolute; left: 16px; color: var(--text-secondary); font-size: 13.5px;
  pointer-events: none;
}
.dd-search input {
  width: 100%; font: inherit; font-size: 14.5px;
  padding: 12px 44px 12px 40px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--card-bg); color: var(--text);
  box-shadow: var(--shadow);
  transition: border-color .18s, box-shadow .18s;
  -webkit-appearance: none;
}
.dd-search input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 16%, transparent);
}
.dd-search kbd { position: absolute; right: 14px; }

.dd-meta {
  margin-top: 22px; display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px 22px; font-size: 13px; color: var(--text-secondary);
}
.dd-meta i { margin-right: 5px; opacity: .8; }
.dd-meta b { color: var(--text); font-weight: 600; }
.dd-meta-gate { color: var(--secondary); }

/* ---------- 板块 ---------- */
.dd-section { margin-top: 46px; }
.dd-sec-head {
  display: flex; align-items: flex-end; gap: 20px; flex-wrap: wrap;
  padding-bottom: 16px; margin-bottom: 22px;
  border-bottom: 1px solid var(--border);
}
.dd-sec-titles { flex: 1 1 420px; }
.dd-sec-kicker {
  font-size: 11.5px; font-weight: 700; letter-spacing: .14em;
  color: var(--secondary); text-transform: uppercase;
}
.dd-sec-head h2 {
  margin: 6px 0 6px; font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700; letter-spacing: -.018em;
}
.dd-sec-head p { margin: 0; color: var(--text-secondary); font-size: 14px; max-width: 720px; }

.dd-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 500;
  padding: 9px 18px; border-radius: 999px;
  border: 1px solid var(--primary); color: var(--primary);
  background: transparent; transition: .18s; white-space: nowrap;
}
.dd-btn:hover {
  background: var(--primary); color: #fff; text-decoration: none;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--primary) 28%, transparent);
}
.dd-btn i { transition: transform .18s; }
.dd-btn:hover i { transform: translateX(3px); }

/* ---------- 文档卡片 ---------- */
.dd-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 18px;
}
.dd-card {
  position: relative; display: flex; flex-direction: column;
  padding: 22px 22px 18px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  color: inherit; text-decoration: none;
  transition: transform .22s cubic-bezier(.2, .7, .3, 1), border-color .22s, box-shadow .22s;
}
.dd-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  box-shadow: var(--shadow-lg); text-decoration: none;
}
.dd-card:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 35%, transparent); }
.dd-card.dd-hidden { display: none; }
.dd-hidden { display: none !important; }   /* 搜索过滤：卡片 / 空板块通用 */

.dd-card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.dd-ico {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; font-size: 16px;
}
.dd-ico-blue   { background: color-mix(in srgb, var(--primary) 12%, transparent);   color: var(--primary); }
.dd-ico-orange { background: color-mix(in srgb, var(--secondary) 14%, transparent); color: var(--secondary); }
.dd-ico-green  { background: color-mix(in srgb, var(--success) 13%, transparent);   color: var(--success); }

.dd-tag {
  margin-left: auto; font-size: 11.5px; font-weight: 600;
  padding: 3px 10px; border-radius: 999px; letter-spacing: .02em;
}
.dd-tag-ok   { color: var(--success); background: color-mix(in srgb, var(--success) 12%, transparent); }
.dd-tag-warn { color: var(--warning); background: color-mix(in srgb, var(--warning) 14%, transparent); }

.dd-card h3 {
  margin: 0 0 8px; font-size: 17.5px; font-weight: 650;
  letter-spacing: -.01em; line-height: 1.35;
}
.dd-card > p {
  margin: 0 0 14px; color: var(--text-secondary); font-size: 13.6px; line-height: 1.62;
  flex: 1 1 auto;
}
.dd-feats {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px;
}
.dd-feats span {
  font-size: 11.8px; color: var(--text-secondary);
  padding: 3px 9px; border-radius: 999px;
  background: var(--input-bg); border: 1px solid var(--border);
}
.dd-open {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13.5px; font-weight: 550; color: var(--primary);
  padding-top: 12px; border-top: 1px solid var(--border);
}
.dd-open i { transition: transform .18s; }
.dd-card:hover .dd-open i { transform: translateX(4px); }

.dd-empty {
  display: none; padding: 40px 20px; text-align: center;
  color: var(--text-secondary); font-size: 14px;
  border: 1px dashed var(--border); border-radius: var(--radius-lg);
}
.dd-empty.show { display: block; }

/* ---------- 子分组：按客户端 / 服务端分类 ---------- */
.dd-subgroup { margin-top: 30px; }
.dd-subgroup:first-of-type { margin-top: 0; }
.dd-subtitle {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  margin: 0 0 14px; font-size: 15.5px; font-weight: 650; letter-spacing: -.01em;
}
.dd-subtitle i { color: var(--primary); font-size: 13px; }
.dd-subtitle span { font-size: 12.6px; font-weight: 400; color: var(--text-secondary); }

/* 通栏细卡（文档总览） */
.dd-card-slim { flex-direction: row; align-items: center; gap: 16px; padding: 15px 20px; }
.dd-card-slim .dd-ico { flex: 0 0 auto; }
.dd-slim-text { display: flex; flex-direction: column; gap: 3px; flex: 1 1 auto; min-width: 0; }
.dd-slim-text b { font-size: 15px; font-weight: 650; }
.dd-slim-text em { font-style: normal; font-size: 12.8px; color: var(--text-secondary); line-height: 1.55; }
.dd-card-slim .dd-open { border-top: 0; padding-top: 0; white-space: nowrap; flex: 0 0 auto; }

/* ---------- 更多板块（规划中） ---------- */
.dd-coming-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px;
}
.dd-coming-item {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 18px; border: 1px dashed var(--border); border-radius: var(--radius-lg);
  color: var(--text-secondary); font-size: 13.6px; background: transparent;
}
.dd-coming-item i { color: var(--text-secondary); opacity: .7; }
.dd-coming-item span em {
  font-style: normal; font-size: 11px; letter-spacing: .06em;
  color: var(--secondary); margin-left: 6px;
}

/* ---------- 维护须知 ---------- */
.dd-maintain {
  margin-top: 54px; padding: 26px 26px 22px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.dd-maint-title {
  margin: 0 0 18px; font-size: 16px; font-weight: 650;
  display: flex; align-items: center; gap: 9px;
}
.dd-maint-title i { color: var(--secondary); }
.dd-maint-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px 22px;
}
.dd-maint-grid h4 {
  margin: 0 0 6px; font-size: 12px; font-weight: 650; letter-spacing: .04em;
  color: var(--text-secondary); text-transform: uppercase;
}
.dd-maint-grid code { display: inline-block; }
.dd-maint-note {
  margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 13px; color: var(--text-secondary);
}

/* ---------- 页脚 ---------- */
.dd-footer {
  margin-top: 40px; padding: 26px 22px 40px;
  text-align: center; color: var(--text-secondary); font-size: 12.8px;
  border-top: 1px solid var(--border);
}

/* ============================================================================
   登录门禁
   ========================================================================== */
#admin-login-overlay.dd-gate {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding: 20px;
}
.dd-gate-card {
  width: 380px; max-width: 100%;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 24px; box-shadow: var(--shadow-lg);
  padding: 36px 32px 28px; text-align: center;
}
.dd-gate-logo {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 20px;
  display: grid; place-items: center; font-size: 24px; color: #fff;
  background: linear-gradient(145deg, var(--primary), var(--primary-light));
  box-shadow: 0 10px 26px color-mix(in srgb, var(--primary) 30%, transparent);
}
.dd-gate-card h2 { margin: 0 0 6px; font-size: 22px; font-weight: 700; letter-spacing: -.01em; }
.dd-gate-card > p { margin: 0 0 22px; color: var(--text-secondary); font-size: 13.6px; }
.dd-gate-card input {
  width: 100%; font: inherit; font-size: 14px;
  margin-bottom: 12px; padding: 12px 15px;
  border: 1.5px solid var(--border); border-radius: 12px;
  background: var(--input-bg); color: var(--text);
  transition: border-color .18s, box-shadow .18s;
}
.dd-gate-card input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 14%, transparent);
}
.dd-gate-err { min-height: 18px; font-size: 12.6px; color: var(--danger); margin-bottom: 8px; }
.admin-login-btn {
  width: 100%; font: inherit; font-size: 14.5px; font-weight: 600;
  padding: 12px; border: none; border-radius: 12px; cursor: pointer;
  color: #fff; background: var(--primary);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: .18s;
}
.admin-login-btn:hover { background: var(--primary-dark); }
.admin-login-btn:disabled { opacity: .6; cursor: default; }
.dd-gate-back {
  display: inline-block; margin-top: 16px;
  font-size: 13px; color: var(--text-secondary);
}
.dd-gate-back:hover { color: var(--text); }

/* ============================================================================
   响应式
   ========================================================================== */
@media (max-width: 860px) {
  .dd-nav-links { display: none; }
  .dd-hero { padding: 52px 0 34px; }
  .dd-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .dd-card-slim { flex-wrap: wrap; }
  .dd-card-slim .dd-open { width: 100%; }
}
@media (max-width: 520px) {
  .dd-main { padding: 0 16px 48px; }
  .dd-nav-inner { padding: 0 16px; gap: 12px; }
  .dd-search input { font-size: 14px; }
  .dd-search kbd { display: none; }
}