/* ===== 站点外壳（M6a：对齐旧 hidns 主题的粘性导航与四列页脚） ===== */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--nav-bg); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); box-shadow: var(--nav-shadow); transition: background 0.3s ease; }
.site-header-inner { width: 100%; height: 64px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.brand { display: inline-flex; align-items: center; padding: 6px 12px; border-radius: 8px; color: var(--text); text-decoration: none; flex-shrink: 0; transition: background 0.2s ease; }
.brand:hover { background: var(--surface-2); color: var(--text); }
.brand img { display: block; width: 120px; height: auto; }
.logo-dark { display: none !important; }
[data-theme="dark"] .logo-dark { display: block !important; }
[data-theme="dark"] .logo-light { display: none !important; }

.site-nav { flex: 1; display: flex; align-items: center; justify-content: center; gap: 4px; }
.site-nav a, .site-nav .link-button { padding: 8px 14px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--text-muted); text-decoration: none; transition: background 0.2s ease, color 0.2s ease; }
.site-nav a:hover, .site-nav .link-button:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--text); }
.site-nav .nav-mobile-only, .site-nav form.nav-mobile-only { display: none; }
.site-nav form { display: inline; margin: 0; }

.nav-end { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.btn-nav-ghost, .btn-nav-primary { display: inline-flex; align-items: center; padding: 8px 16px; border-radius: 8px; font-size: 14px; white-space: nowrap; text-decoration: none; transition: background 0.2s ease, opacity 0.2s ease; }
.btn-nav-ghost { color: var(--text); font-weight: 500; }
.btn-nav-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-nav-primary { background: var(--primary); color: var(--primary-text); font-weight: 600; }
.btn-nav-primary:hover { opacity: 0.85; color: var(--primary-text); }

/* 圆形幽灵图标按钮（主题、语言、GitHub、汉堡） */
.icon-btn { width: 40px; height: 40px; border: 0; border-radius: 50%; background: transparent; color: var(--text-muted); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; padding: 0; text-decoration: none; transition: background 0.2s ease, color 0.2s ease; }
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.icon-btn svg { width: 20px; height: 20px; }
.theme-toggle svg { width: 24px; height: 24px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
.nav-burger { display: none; border-radius: 8px; }

/* GitHub 星标：纯 CSS 悬停提示 */
.gh-star { position: relative; display: flex; align-items: center; }
.gh-star .icon-btn { opacity: 0.6; transition: opacity 0.2s ease; }
.gh-star .icon-btn svg { width: 22px; height: 22px; }
.gh-star:hover .icon-btn, .gh-star:focus-within .icon-btn { opacity: 1; }
.gh-tip { position: absolute; top: 0; right: calc(100% + 8px); background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; white-space: nowrap; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1); opacity: 0; pointer-events: none; transform: translateX(4px); transition: opacity 0.2s ease, transform 0.2s ease; z-index: 100; color: var(--text); font-size: 12px; }
.gh-star:hover .gh-tip, .gh-star:focus-within .gh-tip { opacity: 1; transform: translateX(0); }

/* 下拉菜单（语言、用户） */
.menu-wrap { position: relative; }
.menu { position: absolute; top: calc(100% + 8px); right: 0; min-width: 160px; padding: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-menu); z-index: 100; display: none; }
.menu.open { display: block; }
.menu-title { padding: 6px 12px 10px; font-size: 12px; font-weight: 700; opacity: 0.5; text-transform: uppercase; letter-spacing: 0.05em; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.menu a, .menu .menu-item { display: flex; align-items: center; gap: 8px; width: 100%; padding: 8px 12px; border: 0; border-radius: 8px; background: transparent; font: inherit; font-size: 14px; color: var(--text); text-decoration: none; cursor: pointer; text-align: left; transition: background 0.15s ease; }
.menu a:hover, .menu .menu-item:hover { background: var(--surface-2); color: var(--text); }
.menu a[aria-current="true"] { background: var(--primary); color: var(--primary-text); }
.menu .is-danger { color: var(--danger); }
.menu .is-danger:hover { background: var(--danger-bg); color: var(--danger); }
.menu svg { width: 16px; height: 16px; flex-shrink: 0; }
.menu hr { border: 0; border-top: 1px solid var(--border); margin: 6px 0; }
.menu form { margin: 0; }
.menu .check-mark { margin-left: auto; }

/* 头像：首字母在下，Gravatar 图片盖在上面（加载失败或没有头像时图片被隐藏） */
.avatar-btn { position: relative; width: 40px; height: 40px; padding: 2px; border: 0; border-radius: 50%; background: transparent; cursor: pointer; transition: box-shadow 0.2s ease; }
.avatar-btn:hover { box-shadow: 0 0 0 3px var(--primary); }
.avatar-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.avatar { position: relative; display: block; width: 36px; height: 36px; border-radius: 50%; overflow: hidden; background: var(--primary); color: var(--primary-text); font-size: 15px; font-weight: 700; line-height: 36px; text-align: center; text-transform: uppercase; }
.avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.avatar img.is-broken { display: none; }


@media (max-width: 1024px) {
  .nav-burger { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 4px; padding: 8px 16px 16px; background: var(--surface); border-top: 1px solid var(--border); box-shadow: var(--nav-shadow); }
  .site-header.is-open .site-nav { display: flex; }
  .site-nav a, .site-nav .link-button { display: block; width: 100%; padding: 10px 12px; font-size: 14px; color: var(--text); text-align: left; }
  .site-nav .nav-mobile-only { display: block; }
  .site-nav form.nav-mobile-only { display: block; }
  .btn-nav-ghost, .btn-nav-primary { display: none; }
  .gh-tip { display: none; }
}

@media (max-width: 480px) {
  .gh-star { display: none; }
  .brand { padding: 6px 4px; }
  .brand img { width: 104px; }
  .nav-end { gap: 4px; }
}

.site-main { padding-top: 32px; padding-bottom: 48px; }
.site-main-bare { padding: 0; }
.site-page { min-height: 100vh; display: flex; flex-direction: column; }
.site-page > main { flex: 1 0 auto; }

.site-footer { background: var(--footer-bg); padding: 40px 2rem; }
.footer-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand-name { font-size: 1rem; font-weight: 700; color: var(--text); margin: 0 0 8px; }
.footer-brand-desc { font-size: 14px; opacity: 0.7; margin: 0 0 8px; line-height: 1.5; }
.footer-copy { font-size: 12px; opacity: 0.5; margin: 0; }
.footer-col-title { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.5; margin: 0 0 12px; }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 14px; color: var(--text); text-decoration: none; opacity: 0.7; transition: opacity 0.2s ease; }
.footer-links a:hover { opacity: 1; text-decoration: underline; color: var(--text); }
.footer-extra { max-width: 1280px; margin: 24px auto 0; font-size: 12px; opacity: 0.5; }
@media (max-width: 1024px) { .footer-inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .footer-inner { grid-template-columns: 1fr; } .site-footer { padding: 32px 16px; } }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius); border: 1px solid transparent;
  font: inherit; font-weight: 500; line-height: 1.4; text-decoration: none; cursor: pointer;
}
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn[disabled], .btn.is-disabled { opacity: 0.55; cursor: not-allowed; }
.btn-sm { padding: 4px 10px; font-size: 0.875rem; }
.btn-primary { background: var(--primary); color: var(--primary-text); }
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-text); }
.btn-secondary { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: var(--primary); color: var(--text); }
.btn-danger { background: var(--danger); color: var(--danger-on); }
.btn-danger:hover { filter: brightness(1.1); color: var(--danger-on); }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--surface-2); }

/* ===== 表单 ===== */
.field { display: flex; flex-direction: column; gap: 6px; }
.label { font-weight: 500; }
.label .req { color: var(--danger); margin-left: 3px; }
.hint { margin: 0; color: var(--text-muted); font-size: 0.875rem; }
.error-text { margin: 0; color: var(--danger); font-size: 0.875rem; }
.input, .select, .textarea {
  width: 100%; padding: 8px 12px; font: inherit;
  background: var(--input-bg); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
}
.textarea { min-height: 120px; resize: vertical; }
.input::placeholder, .textarea::placeholder { color: var(--text-muted); opacity: 1; }
/* 聚焦：边框用文字色、不加光圈（旧版 .hidns-form-input:focus 引用的 --primary 从未定义，实际回落为文字色） */
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--text); box-shadow: none; }
.input[disabled], .select[disabled], .textarea[disabled] { background: var(--surface-2); color: var(--text-muted); cursor: not-allowed; }
.is-invalid, .input.is-invalid:focus, .select.is-invalid:focus, .textarea.is-invalid:focus { border-color: var(--danger); }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--primary); }

/* ===== 卡片 ===== */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600; }
.card-body { padding: 18px; }
.card-footer { padding: 12px 18px; border-top: 1px solid var(--border); background: var(--surface-2); border-radius: 0 0 var(--radius) var(--radius); }

/* ===== 提示条 / 徽章 ===== */
.alert { padding: 12px 16px; border-radius: var(--radius); border: 1px solid currentColor; }
.alert-info { background: var(--info-bg); color: var(--info); }
.alert-success { background: var(--success-bg); color: var(--success); }
.alert-warning { background: var(--warning-bg); color: var(--warning); }
.alert-danger { background: var(--danger-bg); color: var(--danger); }

.badge { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 0.8125rem; font-weight: 500; border: 1px solid currentColor; background: var(--surface-2); color: var(--text-muted); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-dark { background: color-mix(in srgb, var(--text) 10%, var(--surface)); color: var(--text); }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { background: var(--surface-2); font-weight: 600; white-space: nowrap; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: var(--surface-2); }

/* ===== 分页 ===== */
.pagination { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; justify-content: center; margin-top: 16px; }
.page-link { padding: 6px 14px; border: 1px solid var(--border-strong); border-radius: var(--radius); text-decoration: none; background: var(--surface); }
.page-link.is-disabled { color: var(--text-muted); border-color: var(--border); pointer-events: none; }
.page-status { color: var(--text-muted); }

/* ===== 工单气泡 ===== */
.ticket-bubble { max-width: 760px; padding: 12px 16px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.ticket-bubble.is-staff { background: var(--info-bg); border-color: var(--info); }
.ticket-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 0.875rem; }
.ticket-quote { margin: 0 0 8px; padding: 6px 12px; border-left: 3px solid var(--border-strong); color: var(--text-muted); background: var(--surface-2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.ticket-body { white-space: pre-wrap; overflow-wrap: anywhere; }

/* ===== DNSSEC / 密钥展示块 ===== */
.ds-block { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 14px 16px; }
.ds-title { margin: 0 0 8px; }
.ds-list { margin: 0; display: flex; flex-direction: column; gap: 10px; }
.ds-row { display: flex; flex-direction: column; gap: 4px; }
.ds-row dt { color: var(--text-muted); font-size: 0.875rem; }
.ds-row dd { margin: 0; display: flex; flex-wrap: wrap; align-items: flex-start; gap: 8px; }
.ds-value { flex: 1 1 280px; overflow-wrap: anywhere; word-break: break-all; background: var(--surface-2); padding: 6px 10px; border-radius: var(--radius-sm); }

/* ===== 样式指南页专用 ===== */
.sg-panes { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; align-items: start; }
.sg-pane { background: var(--bg); color: var(--text); border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 20px; }
.sg-pane > h2 { margin-top: 0; }
.sg-section { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.sg-section > h3 { margin: 0; color: var(--text-muted); font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.04em; }
.sg-swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.sg-sw { border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; font-size: 0.75rem; }
.sg-sw i { display: block; height: 36px; }
.sg-sw span { display: block; padding: 4px 6px; background: var(--surface); color: var(--text); }
.sw-bg { background: var(--bg); } .sw-surface { background: var(--surface); } .sw-surface-2 { background: var(--surface-2); }
.sw-text { background: var(--text); } .sw-text-muted { background: var(--text-muted); }
.sw-border { background: var(--border); } .sw-border-strong { background: var(--border-strong); }
.sw-primary { background: var(--primary); } .sw-success { background: var(--success); } .sw-warning { background: var(--warning); }
.sw-danger { background: var(--danger); } .sw-info { background: var(--info); }
.sw-success-bg { background: var(--success-bg); } .sw-warning-bg { background: var(--warning-bg); }
.sw-danger-bg { background: var(--danger-bg); } .sw-info-bg { background: var(--info-bg); }

/* ===== 语言切换 / 认证页 / 用户中心 ===== */
.auth-wrap { max-width: 560px; margin: 0 auto; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.phone-row { display: grid; grid-template-columns: 96px 1fr; gap: 8px; }
/* .site-nav form 见站点外壳 */
.link-button { background: none; border: 0; padding: 0; font: inherit; color: var(--text-muted); cursor: pointer; text-decoration: none; }
.link-button:hover { color: var(--text); text-decoration: underline; }
.filter-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; align-items: end; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--text-muted); }
.kv dd { margin: 0; overflow-wrap: anywhere; }
.inline-form { display: inline-flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0; }
@media (max-width: 600px) { .kv { grid-template-columns: 1fr; } }

/* M3: 邀请码 */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: .75rem; margin: 0 0 1.25rem; }
.stat { padding: .75rem 1rem; border: 1px solid var(--border, #e5e7eb); border-radius: .5rem; background: var(--card, transparent); }
.stat-value { display: block; font-size: 1.5rem; font-weight: 600; line-height: 1.2; }
.stat-label { display: block; font-size: .8rem; opacity: .7; }
.notice-list { margin: .5rem 0 .75rem 1.25rem; padding: 0; }
.notice-list li { margin: .35rem 0; }
.notice-list ul { margin: .25rem 0 .25rem 1.25rem; }

/* M4: 域名与后缀 */
.input-narrow { width: 7rem; }
details > summary { cursor: pointer; padding: 4px 0; }
details[open] > summary { margin-bottom: 8px; }
.mt-2 { margin-top: .5rem; }

/* CSS-only modal (no JS; CSP safe) */
.modal{display:none;position:fixed;inset:0;z-index:50;align-items:center;justify-content:center;padding:16px}
.modal:target{display:flex}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.45)}
.modal-box{position:relative;background:var(--surface,#fff);color:inherit;border-radius:8px;padding:20px;width:100%;max-width:440px;box-shadow:0 10px 30px rgba(0,0,0,.3)}

/* AdminPanel：两步验证二维码与恢复码 */
.qr { display: flex; justify-content: center; padding: 8px; background: #fff; border-radius: 8px; max-width: 260px; }
.qr svg { width: 100%; height: auto; }
.codes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; }
.codes li { padding: 8px 12px; border: 1px solid var(--border, #ccc); border-radius: 6px; text-align: center; }
a.stat{text-decoration:none;color:inherit}
.whois{margin:0;white-space:pre-wrap;word-break:break-all;font-family:ui-monospace,monospace;font-size:.85rem}
.sg-grad { height: 36px; border-radius: var(--radius-sm); background: var(--grad); }
.sw-secondary { background: var(--secondary); } .sw-accent { background: var(--accent); } .sw-input-bg { background: var(--input-bg); }

/* 通用分页 x-theme::pager（对齐旧版 hn-pager） */
.pager { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0.375rem; margin: 1rem 0 0.5rem; }
.pager-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 2.5rem; height: 2.5rem; padding: 0 0.875rem; box-sizing: border-box; font-size: 0.875rem; font-weight: 500; line-height: 1; text-decoration: none; color: var(--text); background: var(--surface-2); border: 1px solid var(--border); border-radius: 0.5rem; user-select: none; transition: background 0.15s, color 0.15s, border-color 0.15s; }
a.pager-btn:hover { color: var(--primary); background: rgba(87, 13, 248, 0.08); border-color: var(--primary); }
.pager-btn.is-active { color: var(--primary-text); background: var(--primary); border-color: var(--primary); box-shadow: 0 4px 6px -1px rgba(87, 13, 248, 0.35); }
.pager-btn.is-disabled { opacity: 0.35; pointer-events: none; }
.pager-btn.is-gap { border-color: transparent; background: transparent; min-width: 1.5rem; padding: 0; }

/* 问号提示（M6a6 起公共：注册页邮箱白名单、域名详情 NS 白名单）。.tip-host 是定位容器。 */
.tip-host { position: relative; }
.tip { display: inline; }
.tip-btn { display: inline-flex; vertical-align: -3px; margin-left: 2px; padding: 0; background: none; border: 0; color: inherit; cursor: help; }
.tip-btn svg { width: 16px; height: 16px; }
.tip-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 50%; }
.tip-pop { display: none; position: absolute; z-index: 20; top: 100%; left: 0; right: 0; max-width: 360px; margin-top: 6px; padding: 10px 12px; background: var(--surface); color: var(--text); border: 1px solid var(--border-strong); border-radius: 10px; box-shadow: var(--shadow-menu); font-size: 0.8rem; line-height: 1.6; overflow-wrap: anywhere; }
.tip-pop strong { display: block; margin-bottom: 2px; font-weight: 600; }
.tip:hover .tip-pop, .tip:focus-within .tip-pop { display: block; }
.btn-dark { background: #374151; color: #ffffff; border-color: transparent; }
.btn-dark:hover { background: #1f2937; color: #ffffff; }
[data-theme="dark"] .btn-dark { background: #4b5563; }
[data-theme="dark"] .btn-dark:hover { background: #6b7280; }