/* =========================================================
   QiChao 设计系统 (阶段0)
   原创实现：变量化主题、卡片 UI、深色模式、响应式。
   ========================================================= */

:root {
    --qc-accent: #4f7cff;
    --qc-accent-weak: rgba(79, 124, 255, .12);
    --qc-radius: 16px;
    --qc-radius-sm: 10px;

    --qc-bg: #f5f6f9;
    --qc-surface: #ffffff;
    --qc-surface-2: #fbfbfd;
    --qc-text: #1f2330;
    --qc-text-weak: #6b7280;
    --qc-border: #e8eaf0;
    --qc-shadow: 0 6px 24px rgba(20, 24, 40, .06);
    --qc-shadow-hover: 0 12px 36px rgba(20, 24, 40, .12);

    --qc-container: 1200px;
    --qc-gap: 24px;
    --qc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
    --qc-bg: #0f1117;
    --qc-surface: #171a23;
    --qc-surface-2: #1d212c;
    --qc-text: #e7e9f0;
    --qc-text-weak: #9aa2b3;
    --qc-border: #272c39;
    --qc-shadow: 0 6px 24px rgba(0, 0, 0, .35);
    --qc-shadow-hover: 0 12px 36px rgba(0, 0, 0, .5);
    --qc-accent-weak: rgba(79, 124, 255, .18);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.qc-body {
    margin: 0;
    background: var(--qc-bg);
    color: var(--qc-text);
    font-family: var(--qc-font);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background .25s ease, color .25s ease;
}

a { color: var(--qc-accent); text-decoration: none; }
a:hover { opacity: .85; }
img { max-width: 100%; height: auto; }

.qc-container {
    width: 100%;
    max-width: var(--qc-container);
    margin: 0 auto;
    padding: 0 20px;
}

.screen-reader-text {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden; clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}
.qc-skip-link:focus {
    position: fixed; left: 16px; top: 16px; z-index: 999;
    width: auto; height: auto; clip: auto;
    background: var(--qc-surface); padding: 10px 16px; border-radius: var(--qc-radius-sm);
}

/* ---------- 卡片 ---------- */
.qc-card {
    background: var(--qc-surface);
    border: 1px solid var(--qc-border);
    border-radius: var(--qc-radius);
    box-shadow: var(--qc-shadow);
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}

/* ---------- 按钮 ---------- */
.qc-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 16px; border-radius: 999px; border: 1px solid transparent;
    font-size: 14px; font-weight: 600; cursor: pointer; line-height: 1;
    transition: background .2s ease, color .2s ease, border-color .2s ease, transform .1s ease;
}
.qc-btn:active { transform: translateY(1px); }
.qc-btn--primary { background: var(--qc-accent); color: #fff; }
.qc-btn--primary:hover { opacity: 1; filter: brightness(1.06); }
.qc-btn--ghost { background: transparent; color: var(--qc-text); border-color: var(--qc-border); }
.qc-btn--ghost:hover { border-color: var(--qc-accent); color: var(--qc-accent); }

/* ---------- 顶部导航 ---------- */
.qc-header {
    position: sticky; top: 0; z-index: 100;
    background: color-mix(in srgb, var(--qc-surface) 88%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--qc-border);
}
.qc-header__inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.qc-brand { flex: 0 0 auto; font-size: 20px; font-weight: 800; }
.qc-brand__text { color: var(--qc-text); }
.qc-brand img { max-height: 40px; width: auto; }

.qc-nav { flex: 1 1 auto; }
.qc-menu { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.qc-menu li { position: relative; }
.qc-menu a {
    display: block; padding: 8px 14px; border-radius: var(--qc-radius-sm);
    color: var(--qc-text); font-weight: 500;
}
.qc-menu a:hover, .qc-menu .current-menu-item > a {
    background: var(--qc-accent-weak); color: var(--qc-accent); opacity: 1;
}
.qc-menu .sub-menu {
    position: absolute; top: 100%; left: 0; min-width: 180px;
    background: var(--qc-surface); border: 1px solid var(--qc-border);
    border-radius: var(--qc-radius-sm); box-shadow: var(--qc-shadow);
    list-style: none; margin: 6px 0 0; padding: 6px;
    opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: .18s ease;
}
.qc-menu li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }

.qc-header__actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.qc-search-toggle, .qc-theme-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 50%;
    border: 1px solid var(--qc-border); background: var(--qc-surface);
    color: var(--qc-text); cursor: pointer; transition: .2s ease;
}
.qc-search-toggle:hover, .qc-theme-toggle:hover { border-color: var(--qc-accent); color: var(--qc-accent); }
.qc-theme-toggle .qc-icon-moon { display: none; }
[data-theme="dark"] .qc-theme-toggle .qc-icon-sun { display: none; }
[data-theme="dark"] .qc-theme-toggle .qc-icon-moon { display: inline; }

.qc-menu-toggle { display: none; flex-direction: column; gap: 4px; width: 38px; height: 38px; align-items: center; justify-content: center; background: none; border: 1px solid var(--qc-border); border-radius: 10px; cursor: pointer; }
.qc-menu-toggle span { width: 18px; height: 2px; background: var(--qc-text); border-radius: 2px; transition: .2s; }

/* 搜索栏 */
.qc-searchbar { border-top: 1px solid var(--qc-border); padding: 14px 0; background: var(--qc-surface); }
.qc-searchform { display: flex; gap: 8px; }
.qc-searchform__input {
    flex: 1; padding: 10px 16px; border-radius: 999px;
    border: 1px solid var(--qc-border); background: var(--qc-surface-2); color: var(--qc-text); font-size: 14px;
}
.qc-searchform__input:focus { outline: none; border-color: var(--qc-accent); }
.qc-searchform__btn { padding: 0 20px; border-radius: 999px; border: none; background: var(--qc-accent); color: #fff; font-weight: 600; cursor: pointer; }

/* ---------- 布局 ---------- */
.qc-main { padding: var(--qc-gap) 0 48px; }
.qc-layout { display: grid; gap: var(--qc-gap); align-items: start; }
.qc-layout--sidebar { grid-template-columns: minmax(0, 1fr) 320px; }
.qc-layout--full { grid-template-columns: minmax(0, 1fr); }
.qc-sidebar__inner { display: flex; flex-direction: column; gap: var(--qc-gap); position: sticky; top: 84px; }
.qc-sidebar .widget { padding: 18px; }
.widget-title { margin: 0 0 12px; font-size: 16px; }

.qc-page-head { margin-bottom: var(--qc-gap); }
.qc-page-title { margin: 0; font-size: 26px; font-weight: 800; }
.qc-page-title span { color: var(--qc-accent); }
.qc-page-desc { color: var(--qc-text-weak); margin-top: 6px; }

/* ---------- 卡片网格 ---------- */
.qc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--qc-gap); }
.qc-post-card { overflow: hidden; display: flex; flex-direction: column; }
.qc-post-card:hover { box-shadow: var(--qc-shadow-hover); transform: translateY(-3px); border-color: color-mix(in srgb, var(--qc-accent) 40%, var(--qc-border)); }
.qc-post-card__cover { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--qc-surface-2); }
.qc-post-card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.qc-post-card:hover .qc-post-card__cover img { transform: scale(1.05); }
.qc-post-card__body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.qc-post-card__title { margin: 0; font-size: 17px; line-height: 1.45; }
.qc-post-card__title a { color: var(--qc-text); }
.qc-post-card__title a:hover { color: var(--qc-accent); }
.qc-post-card__excerpt { margin: 0; color: var(--qc-text-weak); font-size: 13.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.qc-tag {
    align-self: flex-start; font-size: 12px; padding: 3px 10px; border-radius: 999px;
    background: var(--qc-accent-weak); color: var(--qc-accent); font-weight: 600;
}

/* 元信息 */
.qc-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: auto; color: var(--qc-text-weak); font-size: 12.5px; }
.qc-meta__author { display: inline-flex; align-items: center; gap: 6px; color: var(--qc-text-weak); }
.qc-avatar { border-radius: 50%; }
.qc-meta__cats a { color: var(--qc-text-weak); }

/* ---------- 单篇 ---------- */
.qc-single { padding: 28px; }
.qc-single__title { margin: 0 0 14px; font-size: 28px; font-weight: 800; line-height: 1.35; }
.qc-single__cover { margin: 20px 0; border-radius: var(--qc-radius-sm); overflow: hidden; }
.qc-prose { font-size: 16px; }
.qc-prose img { border-radius: var(--qc-radius-sm); }
.qc-prose h2 { font-size: 22px; margin-top: 1.6em; }
.qc-prose h3 { font-size: 19px; margin-top: 1.4em; }
.qc-prose pre { background: var(--qc-surface-2); border: 1px solid var(--qc-border); border-radius: var(--qc-radius-sm); padding: 16px; overflow: auto; }
.qc-prose blockquote { margin: 1.2em 0; padding: 8px 18px; border-left: 3px solid var(--qc-accent); background: var(--qc-accent-weak); border-radius: 0 var(--qc-radius-sm) var(--qc-radius-sm) 0; }
.qc-tags { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.qc-tags a { font-size: 12px; padding: 4px 12px; border-radius: 999px; background: var(--qc-surface-2); border: 1px solid var(--qc-border); color: var(--qc-text-weak); }

/* ---------- 分页 ---------- */
.qc-pagination { margin-top: var(--qc-gap); }
.qc-pagination .nav-links { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.qc-pagination .page-numbers {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 12px; border-radius: var(--qc-radius-sm);
    background: var(--qc-surface); border: 1px solid var(--qc-border); color: var(--qc-text);
}
.qc-pagination .page-numbers.current { background: var(--qc-accent); border-color: var(--qc-accent); color: #fff; }
.qc-pagination .page-numbers:hover { border-color: var(--qc-accent); color: var(--qc-accent); opacity: 1; }

/* ---------- 空状态 / 404 ---------- */
.qc-empty { padding: 48px 28px; text-align: center; }
.qc-empty .qc-searchform { max-width: 420px; margin: 16px auto 0; }
.qc-404 h1 { font-size: 72px; margin: 0; color: var(--qc-accent); }
.qc-404 .qc-btn { margin-top: 16px; }

/* ---------- 页脚 ---------- */
.qc-footer { background: var(--qc-surface); border-top: 1px solid var(--qc-border); margin-top: 40px; }
.qc-footer__inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding: 40px 20px; }
.qc-footer__brand p { color: var(--qc-text-weak); margin: 6px 0 0; }
.qc-footer__menu { list-style: none; display: flex; gap: 18px; margin: 0; padding: 0; flex-wrap: wrap; }
.qc-footer__menu a { color: var(--qc-text-weak); }
.qc-footer__bottom { border-top: 1px solid var(--qc-border); padding: 16px 0; text-align: center; color: var(--qc-text-weak); font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .qc-layout--sidebar { grid-template-columns: minmax(0, 1fr); }
    .qc-sidebar { display: none; }
}
@media (max-width: 768px) {
    .qc-grid { grid-template-columns: minmax(0, 1fr); }
    .qc-nav {
        position: fixed; inset: 64px 0 auto 0; background: var(--qc-surface);
        border-bottom: 1px solid var(--qc-border); padding: 12px 20px;
        transform: translateY(-130%); transition: transform .25s ease; box-shadow: var(--qc-shadow);
    }
    .qc-nav.is-open { transform: translateY(0); }
    .qc-menu { flex-direction: column; }
    .qc-menu .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; padding-left: 14px; }
    .qc-menu-toggle { display: inline-flex; }
    .qc-single { padding: 20px; }
    .qc-single__title { font-size: 23px; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

/* =========================================================
   阶段1-4 组件
   ========================================================= */

/* ---------- 首页英雄区 ---------- */
.qc-hero { display: grid; grid-template-columns: 2fr 1fr; gap: var(--qc-gap); margin-bottom: var(--qc-gap); }
.qc-hero__main { position: relative; overflow: hidden; min-height: 320px; }
.qc-hero__cover { display: block; height: 100%; }
.qc-hero__cover img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
.qc-hero__overlay { position: absolute; inset: auto 0 0 0; padding: 24px; background: linear-gradient(to top, rgba(0,0,0,.72), transparent); color: #fff; }
.qc-hero__overlay h2 { margin: 8px 0 0; font-size: 22px; }
.qc-hero__overlay h2 a { color: #fff; }
.qc-hero__side { display: flex; flex-direction: column; gap: 12px; }
.qc-hero__item { padding: 14px 16px; }
.qc-hero__item a { color: var(--qc-text); font-weight: 600; display: block; }
.qc-hero__item a:hover { color: var(--qc-accent); }
.qc-hero__item time { color: var(--qc-text-weak); font-size: 12px; }

/* ---------- 首页分区 ---------- */
.qc-home-section { margin-bottom: 36px; }
.qc-home-section__head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }
.qc-home-section__title { margin: 0; font-size: 20px; font-weight: 800; position: relative; padding-left: 12px; }
.qc-home-section__title::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 4px; background: var(--qc-accent); }
.qc-home-section__more { color: var(--qc-text-weak); font-size: 13px; }
.qc-section-title { font-size: 18px; margin: 0 0 14px; }

/* ---------- 等级徽章 ---------- */
.qc-level { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--qc-accent-weak); color: var(--qc-accent); vertical-align: middle; }
.qc-level--4, .qc-level--5 { background: linear-gradient(135deg, #ffb347, #ffcc70); color: #6b3b00; }
.qc-level--6, .qc-level--7 { background: linear-gradient(135deg, #ff6a88, #ff99ac); color: #5a0021; }

/* ---------- 个人中心 ---------- */
.qc-user-head { display: flex; align-items: center; gap: 20px; padding: 24px; margin-bottom: var(--qc-gap); }
.qc-user-head__avatar { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; }
.qc-user-head__name { margin: 0 0 8px; font-size: 22px; display: flex; align-items: center; gap: 10px; }
.qc-user-head__stats { display: flex; gap: 20px; color: var(--qc-text-weak); font-size: 14px; }
.qc-user-head__stats strong { color: var(--qc-text); font-size: 18px; }
.qc-user-head__actions { margin-left: auto; }
.qc-user-body { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: var(--qc-gap); align-items: start; }
.qc-credit-logs { padding: 18px; }
.qc-credit-logs__list { list-style: none; margin: 0; padding: 0; }
.qc-credit-logs__list li { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--qc-border); font-size: 13px; }
.qc-credit-logs__note { flex: 1; color: var(--qc-text); }
.qc-credit-logs__amount.is-plus { color: #18a058; font-weight: 700; }
.qc-credit-logs__amount.is-minus { color: #d03050; font-weight: 700; }
.qc-credit-logs__list time { color: var(--qc-text-weak); font-size: 12px; }

/* ---------- 点赞 ---------- */
.qc-like { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--qc-border); background: var(--qc-surface); color: var(--qc-text); cursor: pointer; }
.qc-like.is-liked { border-color: var(--qc-accent); color: var(--qc-accent); background: var(--qc-accent-weak); }

/* ---------- 下载/付费框 ---------- */
.qc-download { padding: 22px; margin-top: var(--qc-gap); }
.qc-download h3 { margin: 0 0 14px; }
.qc-download__pwd { margin-left: 12px; color: var(--qc-text-weak); }
.qc-download__pwd code { background: var(--qc-surface-2); padding: 2px 8px; border-radius: 6px; }
.qc-download__locked { text-align: center; padding: 16px; background: var(--qc-surface-2); border-radius: var(--qc-radius-sm); }
.qc-download__money { font-weight: 600; margin: 0 0 12px; }
.qc-download__methods { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.qc-download__recharge { margin: 12px 0 0; font-size: 13px; }
.qc-download__recharge a { color: var(--qc-accent); }

/* ---------- VIP 开通 ---------- */
.qc-vip { padding: 24px; }
.qc-vip__title { margin: 0 0 12px; }
.qc-vip__status { margin: 0 0 16px; color: var(--qc-text-weak); }
.qc-vip__status.is-vip { color: var(--qc-accent); font-weight: 600; }
.qc-vip__note { margin: 0 0 16px; }
.qc-vip__plans { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.qc-vip__plan { border: 1px solid var(--qc-border); border-radius: var(--qc-radius-sm); padding: 18px; text-align: center; background: var(--qc-surface-2); }
.qc-vip__plan-name { font-size: 16px; font-weight: 700; }
.qc-vip__plan-days { color: var(--qc-text-weak); margin: 4px 0 10px; font-size: 13px; }
.qc-vip__plan-price { margin-bottom: 14px; }
.qc-vip__money { font-size: 22px; font-weight: 700; color: var(--qc-accent); }
.qc-vip__credit { display: block; font-size: 12px; color: var(--qc-text-weak); margin-top: 2px; }
.qc-vip__buy { display: flex; flex-direction: column; gap: 8px; }
.qc-vip__tip { margin: 14px 0 0; font-size: 13px; color: var(--qc-text-weak); }

/* ---------- 投稿表单 ---------- */
.qc-submit-form { padding: 24px; }
.qc-submit-form h3 { margin: 0 0 16px; }
.qc-input { width: 100%; padding: 12px 14px; border-radius: var(--qc-radius-sm); border: 1px solid var(--qc-border); background: var(--qc-surface-2); color: var(--qc-text); font-size: 14px; font-family: inherit; }
.qc-input:focus { outline: none; border-color: var(--qc-accent); }
.qc-submit-tip { margin-left: 12px; color: var(--qc-text-weak); font-size: 13px; }

/* ---------- 评论 ---------- */
.qc-comments { padding: 24px; margin-top: var(--qc-gap); }
.qc-comment-list { list-style: none; margin: 0 0 20px; padding: 0; }
.qc-comment-list .children { list-style: none; padding-left: 24px; }
.qc-comment-list .comment-body { padding: 14px 0; border-bottom: 1px dashed var(--qc-border); }

/* ---------- 提示气泡 ---------- */
.qc-toast { position: fixed; left: 50%; bottom: 40px; translate: -50% 0; background: var(--qc-text); color: var(--qc-bg); padding: 12px 22px; border-radius: 999px; font-size: 14px; box-shadow: var(--qc-shadow-hover); opacity: 0; transition: opacity .25s ease, bottom .25s ease; z-index: 999; }
.qc-toast.is-show { opacity: 1; bottom: 52px; }

@media (max-width: 1024px) {
    .qc-user-body { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 768px) {
    .qc-hero { grid-template-columns: minmax(0, 1fr); }
    .qc-user-head { flex-wrap: wrap; }
    .qc-user-head__actions { margin-left: 0; width: 100%; }
}

/* ---------- 阶段6：推广横幅 / 快捷发布栏 / 模块区 ---------- */
.qc-promo-banner {
    max-width: var(--qc-container);
    margin: var(--qc-gap) auto 0;
    padding: 0 var(--qc-gap);
}

.qc-quickbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    max-width: var(--qc-container);
    margin: var(--qc-gap) auto 0;
    padding: 14px 18px;
    background: var(--qc-surface);
    border: 1px solid var(--qc-border);
    border-radius: var(--qc-radius);
    box-shadow: var(--qc-shadow);
}
.qc-quickbar__label { font-weight: 700; color: var(--qc-text-weak); margin-right: 4px; }
.qc-quickbar__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--qc-surface-2);
    border: 1px solid var(--qc-border);
    color: var(--qc-text);
    font-size: 14px;
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.qc-quickbar__item:hover { background: var(--qc-accent-weak); border-color: var(--qc-accent); opacity: 1; transform: translateY(-1px); }
.qc-quickbar__icon { font-size: 15px; }

.qc-grid--module { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.qc-module--navlink .qc-grid--module { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }

.qc-mcard { display: flex; flex-direction: column; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease; }
.qc-mcard:hover { transform: translateY(-3px); box-shadow: var(--qc-shadow-hover); }
.qc-mcard__cover {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, var(--qc-accent-weak), var(--qc-surface-2));
}
.qc-mcard__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.qc-mcard:hover .qc-mcard__cover img { transform: scale(1.05); }
.qc-mcard__ph {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%;
    font-size: 64px; font-weight: 800; line-height: 1;
    color: var(--qc-accent); opacity: .22;
    text-transform: uppercase; letter-spacing: 2px;
    background: radial-gradient(120% 120% at 30% 20%, rgba(255,255,255,.35), transparent 60%);
}
.qc-mcard__body { padding: 14px; display: flex; flex-direction: column; gap: 6px; }
.qc-mcard__title { font-size: 15px; margin: 0; line-height: 1.4; }
.qc-mcard__title a { color: var(--qc-text); }
.qc-mcard__title a:hover { color: var(--qc-accent); opacity: 1; }
.qc-mcard__price { color: #e0533d; font-weight: 700; font-size: 15px; }
.qc-mcard__excerpt { margin: 0; color: var(--qc-text-weak); font-size: 13px; }

/* 后台模块开关样式 */
.qc-switch { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 7b2 风格：轮播 ---------- */
.qc-carousel { position: relative; max-width: var(--qc-container); margin: var(--qc-gap) auto 0; padding: 0 var(--qc-gap); }
.qc-carousel__track {
    display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory;
    scrollbar-width: none; -ms-overflow-style: none; border-radius: var(--qc-radius);
}
.qc-carousel__track::-webkit-scrollbar { display: none; }
.qc-slide { flex: 0 0 calc(50% - 8px); scroll-snap-align: start; }
.qc-slide__cover { position: relative; display: block; aspect-ratio: 21 / 9; border-radius: var(--qc-radius); overflow: hidden; background: var(--qc-surface-2); }
.qc-slide__cover img { width: 100%; height: 100%; object-fit: cover; }
.qc-slide__ph { display: flex; align-items: center; justify-content: center; height: 100%; padding: 20px; font-size: 22px; font-weight: 800; color: var(--qc-accent); text-align: center; }
.qc-slide__mask { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.72)); }
.qc-slide__caption { position: absolute; left: 18px; right: 18px; bottom: 16px; color: #fff; font-size: 18px; font-weight: 700; line-height: 1.4; display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.qc-carousel__btn {
    position: absolute; top: 50%; translate: 0 -50%; z-index: 2;
    width: 40px; height: 40px; border-radius: 50%; border: none; cursor: pointer;
    background: rgba(0,0,0,.45); color: #fff; font-size: 24px; line-height: 1;
    display: flex; align-items: center; justify-content: center; transition: background .2s ease;
}
.qc-carousel__btn:hover { background: var(--qc-accent); }
.qc-carousel__btn--prev { left: calc(var(--qc-gap) + 8px); }
.qc-carousel__btn--next { right: calc(var(--qc-gap) + 8px); }

/* ---------- 7b2 风格：瀑布信息流 ---------- */
.qc-feed { max-width: var(--qc-container); margin: var(--qc-gap) auto 0; padding: 0 var(--qc-gap); }
.qc-feed__head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.qc-feed__title { font-size: 20px; margin: 0; position: relative; padding-left: 14px; }
.qc-feed__title::before { content: ""; position: absolute; left: 0; top: 50%; translate: 0 -50%; width: 5px; height: 20px; border-radius: 3px; background: var(--qc-accent); }
.qc-waterfall { columns: 4 240px; column-gap: 18px; }
.qc-waterfall > .qc-post-card { break-inside: avoid; margin: 0 0 18px; display: inline-block; width: 100%; }
.qc-loadmore-wrap { text-align: center; margin: 28px 0 8px; }
.qc-loadmore { min-width: 180px; }

/* ---------- 商品购买框 ---------- */
.qc-buybox { margin-top: var(--qc-gap); padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.qc-buybox__price { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.qc-buybox__money { font-size: 26px; font-weight: 800; color: #e0533d; }
.qc-buybox__credit { color: var(--qc-text-weak); }
.qc-buybox__sales { margin-left: auto; color: var(--qc-text-weak); font-size: 13px; }
.qc-buybox__methods { display: flex; gap: 10px; flex-wrap: wrap; }
.qc-buybox__owned { color: #2e9e5b; font-weight: 600; margin: 0; }
.qc-buybox__tip { margin: 0; color: var(--qc-text-weak); font-size: 13px; min-height: 18px; }
.qc-buybox__recharge { margin: 0; font-size: 13px; }
.qc-buybox__recharge a { color: var(--qc-accent); }

/* ---------- 余额充值 + 收银台 ---------- */
.qc-recharge { max-width: 560px; margin: var(--qc-gap) auto; padding: 22px; display: flex; flex-direction: column; gap: 16px; }
.qc-recharge__head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.qc-recharge__title { font-size: 18px; font-weight: 700; }
.qc-recharge__balance { color: var(--qc-text-weak); font-size: 14px; }
.qc-recharge__amounts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.qc-recharge__preset {
    padding: 14px 8px; border: 1px solid var(--qc-border); border-radius: var(--qc-radius);
    background: var(--qc-surface); color: var(--qc-text); font-size: 16px; font-weight: 700; cursor: pointer;
    transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.qc-recharge__preset:hover { border-color: var(--qc-accent); color: var(--qc-accent); }
.qc-recharge__preset.is-active { border-color: var(--qc-accent); color: #fff; background: var(--qc-accent); }
.qc-recharge__custom label { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--qc-text-weak); }
.qc-recharge__custom input { flex: 1; padding: 10px 12px; border: 1px solid var(--qc-border); border-radius: var(--qc-radius); background: var(--qc-surface); color: var(--qc-text); }
.qc-recharge__methods { display: flex; gap: 10px; flex-wrap: wrap; }
.qc-recharge__note, .qc-recharge__tip { margin: 0; color: var(--qc-text-weak); font-size: 13px; }
.qc-cashier { border-top: 1px dashed var(--qc-border); padding-top: 16px; display: flex; flex-direction: column; gap: 12px; }
.qc-cashier__info p { margin: 0 0 6px; font-size: 14px; }
.qc-cashier__amount { color: #e0533d; font-weight: 700; font-size: 16px; }
.qc-cashier__note { color: var(--qc-text-weak); font-size: 13px; }
.qc-cashier__actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- 受限内容锁定提示 ---------- */
.qc-content-locked {
    margin: var(--qc-gap) 0; padding: 22px; text-align: center;
    border: 1px dashed var(--qc-border); border-radius: var(--qc-radius);
    background: var(--qc-surface);
}
.qc-content-locked__msg { margin: 0 0 14px; color: var(--qc-text-weak); font-size: 14px; }

@media (max-width: 900px) {
    .qc-slide { flex-basis: calc(100% - 0px); }
    .qc-waterfall { columns: 2 160px; }
}
@media (max-width: 560px) {
    .qc-waterfall { columns: 1; }
}

/* ============================================================
 * 阶段8：账号中心（登录弹窗 / 用户下拉 / 个人中心）
 * ============================================================ */

/* 通用模态 */
body.qc-modal-open { overflow: hidden; }
.qc-modal { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; padding: 16px; }
.qc-modal[hidden] { display: none; }
.qc-modal__overlay { position: absolute; inset: 0; background: rgba(15, 17, 23, .55); backdrop-filter: blur(2px); }
.qc-modal__dialog {
    position: relative; z-index: 1; width: 100%; max-width: 380px;
    background: var(--qc-surface); border: 1px solid var(--qc-border);
    border-radius: var(--qc-radius); box-shadow: 0 24px 60px rgba(0,0,0,.28);
    padding: 28px 26px 22px; animation: qc-modal-in .22s ease;
}
@keyframes qc-modal-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.qc-modal__close {
    position: absolute; top: 10px; right: 14px; width: 32px; height: 32px; line-height: 1;
    font-size: 24px; color: var(--qc-text-weak); background: none; border: none; cursor: pointer; border-radius: 8px;
}
.qc-modal__close:hover { color: var(--qc-text); background: var(--qc-surface-2); }

/* 登录弹窗 */
.qc-auth__brand { text-align: center; margin-bottom: 6px; }
.qc-auth__brand img, .qc-auth__brand .custom-logo { max-height: 44px; width: auto; }
.qc-auth__brandtext { font-size: 22px; font-weight: 700; color: var(--qc-text); }
.qc-auth__tabs { display: flex; gap: 18px; justify-content: center; margin: 14px 0 18px; }
.qc-auth__tab {
    background: none; border: none; padding: 4px 2px 8px; font-size: 16px; cursor: pointer;
    color: var(--qc-text-weak); border-bottom: 2px solid transparent; font-weight: 600;
}
.qc-auth__tab.is-active { color: var(--qc-text); border-bottom-color: var(--qc-accent); }

.qc-auth__form { display: none; flex-direction: column; gap: 14px; }
.qc-auth__form.is-active { display: flex; }
.qc-auth__field { position: relative; display: flex; flex-direction: column; gap: 6px; }
.qc-auth__field label { font-size: 12px; color: var(--qc-text-weak); }
.qc-auth__field input {
    width: 100%; padding: 11px 12px; border-radius: var(--qc-radius-sm);
    border: 1px solid var(--qc-border); background: var(--qc-surface-2); color: var(--qc-text); font-size: 14px;
}
.qc-auth__field input:focus { outline: none; border-color: var(--qc-accent); }
.qc-auth__field--password input { padding-right: 40px; }
.qc-auth__eye {
    position: absolute; right: 8px; bottom: 7px; width: 30px; height: 30px;
    background: none; border: none; cursor: pointer; opacity: .45; font-size: 15px;
}
.qc-auth__eye.is-on, .qc-auth__eye:hover { opacity: .9; }
.qc-auth__remember { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--qc-text-weak); }
.qc-auth__submit { width: 100%; justify-content: center; padding: 12px; font-size: 15px; }
.qc-auth__links { display: flex; justify-content: space-between; font-size: 13px; color: var(--qc-text-weak); }
.qc-auth__links a { color: var(--qc-accent); }
.qc-auth__tip { min-height: 18px; margin: 0; font-size: 13px; text-align: center; color: var(--qc-text-weak); }
.qc-auth__tip.is-ok { color: #16a34a; }
.qc-auth__tip.is-err { color: #ef4444; }
.qc-auth__social { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--qc-border); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center; }
.qc-auth__social-label { font-size: 12px; color: var(--qc-text-weak); }
.qc-auth__social-btn { padding: 6px 12px; border-radius: 20px; border: 1px solid var(--qc-border); background: var(--qc-surface-2); color: var(--qc-text); font-size: 13px; cursor: pointer; }
.qc-auth__social-btn:hover { border-color: var(--qc-accent); color: var(--qc-accent); }

/* 头部用户下拉 */
.qc-usermenu { position: relative; }
.qc-usermenu__trigger { padding: 0; width: 38px; height: 38px; border-radius: 50%; overflow: hidden; border: 1px solid var(--qc-border); background: var(--qc-surface); cursor: pointer; }
.qc-usermenu__trigger img { width: 100%; height: 100%; object-fit: cover; display: block; }
.qc-usermenu__trigger:hover { border-color: var(--qc-accent); }
.qc-usermenu__panel {
    position: absolute; right: 0; top: calc(100% + 10px); width: 280px; z-index: 200;
    background: var(--qc-surface); border: 1px solid var(--qc-border); border-radius: var(--qc-radius);
    box-shadow: 0 18px 44px rgba(0,0,0,.18); padding: 16px; animation: qc-modal-in .16s ease;
}
.qc-usermenu__panel[hidden] { display: none; }
.qc-usermenu__head { display: flex; align-items: center; gap: 10px; }
.qc-usermenu__head img { border-radius: 50%; }
.qc-usermenu__id { flex: 1; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.qc-usermenu__id strong { font-size: 15px; color: var(--qc-text); }
.qc-usermenu__logout { color: var(--qc-text-weak); font-size: 18px; }
.qc-usermenu__logout:hover { color: #ef4444; }
.qc-badge-vip { background: linear-gradient(135deg,#f59e0b,#ef4444); color:#fff; font-size: 11px; padding: 1px 7px; border-radius: 10px; font-weight: 700; }
.qc-usermenu__stats { display: flex; margin: 14px 0; text-align: center; }
.qc-usermenu__stats div { flex: 1; display: flex; flex-direction: column; }
.qc-usermenu__stats strong { font-size: 17px; color: var(--qc-text); }
.qc-usermenu__stats span { font-size: 12px; color: var(--qc-text-weak); }
.qc-usermenu__wallet { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--qc-radius-sm); background: var(--qc-surface-2); margin-bottom: 12px; }
.qc-usermenu__wallet > a:first-child { flex: 1; display: flex; flex-direction: column; color: var(--qc-text); }
.qc-usermenu__wallet-label { font-size: 12px; color: var(--qc-text-weak); }
.qc-usermenu__wallet-value { font-size: 18px; font-weight: 700; }
.qc-btn--sm { padding: 6px 14px; font-size: 13px; }
.qc-usermenu__nav { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.qc-usermenu__nav a { padding: 9px 10px; border-radius: var(--qc-radius-sm); color: var(--qc-text); font-size: 13px; }
.qc-usermenu__nav a:hover { background: var(--qc-accent-weak); color: var(--qc-accent); }

/* 个人中心：财富卡 / 设置 */
.qc-wallet-card { display: flex; gap: 12px; flex-wrap: wrap; }
.qc-wallet-card .qc-wallet-item {
    flex: 1; min-width: 130px; padding: 16px; border-radius: var(--qc-radius-sm);
    background: var(--qc-surface-2); border: 1px solid var(--qc-border);
}
.qc-wallet-item__label { font-size: 12px; color: var(--qc-text-weak); }
.qc-wallet-item__value { font-size: 22px; font-weight: 700; color: var(--qc-text); margin-top: 4px; }
.qc-wallet-item__action { margin-top: 10px; }
.qc-user-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 16px; }
.qc-user-tabs a { padding: 8px 14px; border-radius: 20px; border: 1px solid var(--qc-border); color: var(--qc-text); font-size: 14px; }
.qc-user-tabs a.is-active, .qc-user-tabs a:hover { background: var(--qc-accent); color: #fff; border-color: var(--qc-accent); }
.qc-setform { display: flex; flex-direction: column; gap: 14px; max-width: 420px; }
.qc-setform label { font-size: 13px; color: var(--qc-text-weak); display: flex; flex-direction: column; gap: 6px; }
.qc-setform input { padding: 10px 12px; border-radius: var(--qc-radius-sm); border: 1px solid var(--qc-border); background: var(--qc-surface-2); color: var(--qc-text); }
.qc-setform input:focus { outline: none; border-color: var(--qc-accent); }
.qc-setform__tip { min-height: 18px; font-size: 13px; margin: 0; }
.qc-setform__tip.is-ok { color: #16a34a; }
.qc-setform__tip.is-err { color: #ef4444; }

@media (max-width: 420px) {
    .qc-usermenu__panel { width: calc(100vw - 32px); }
}

/* ---------- 移动端自适应增强（修复页头/导航/首页栏目） ---------- */
@media (max-width: 768px) {
    .qc-header__inner { gap: 10px; }
    /* 右侧操作区在移动端右对齐（导航脱离文档流后不再有撑开元素） */
    .qc-header__actions { margin-left: auto; gap: 6px; }
    /* 收起态导航彻底隐藏，避免下垂露出与图标重叠 */
    .qc-nav {
        opacity: 0; visibility: hidden; pointer-events: none;
        transform: translateY(-8px);
        transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
        max-height: calc(100vh - 64px); overflow-y: auto;
    }
    .qc-nav.is-open { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
    /* 快捷发布栏改为横向滚动，避免在小屏堆叠成多行 */
    .qc-quickbar { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
    .qc-quickbar::-webkit-scrollbar { display: none; }
    .qc-quickbar__label { flex: 0 0 auto; }
    .qc-quickbar__item { flex: 0 0 auto; white-space: nowrap; }
    /* 模块区标题与“更多”不挤压 */
    .qc-home-section__head { gap: 8px; }
}
@media (max-width: 480px) {
    .qc-grid--module { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .qc-mcard__ph { font-size: 48px; }
    .qc-slide__caption { font-size: 15px; left: 14px; right: 14px; bottom: 12px; }
    .qc-carousel__btn { width: 32px; height: 32px; font-size: 18px; }
    .qc-single__title { font-size: 21px; }
    .qc-footer__inner { padding: 28px 16px; gap: 18px; }
}

/* ---------- 移动端底部标签栏（参考资源站手机布局） ---------- */
.qc-tabbar { display: none; }
@media (max-width: 768px) {
    body { padding-bottom: 60px; }
    .qc-tabbar {
        display: flex; align-items: center; justify-content: space-around;
        position: fixed; left: 0; right: 0; bottom: 0; z-index: 300;
        height: 56px; padding-bottom: env(safe-area-inset-bottom);
        background: color-mix(in srgb, var(--qc-surface) 94%, transparent);
        backdrop-filter: saturate(180%) blur(12px);
        border-top: 1px solid var(--qc-border);
        box-shadow: 0 -4px 16px rgba(0, 0, 0, .06);
    }
    .qc-tabbar__item {
        flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
        font-size: 11px; color: var(--qc-text-weak);
        background: none; border: none; cursor: pointer; padding: 6px 0; text-decoration: none;
    }
    .qc-tabbar__item svg { width: 22px; height: 22px; }
    .qc-tabbar__item span { line-height: 1; }
    .qc-tabbar__item.is-active, .qc-tabbar__item:hover { color: var(--qc-accent); opacity: 1; }
    .qc-tabbar__pub {
        flex: 0 0 auto; width: 46px; height: 46px; margin-top: -20px;
        display: flex; align-items: center; justify-content: center;
        border: 3px solid var(--qc-surface); cursor: pointer; border-radius: 50%;
        background: var(--qc-accent); color: #fff;
        box-shadow: 0 8px 18px color-mix(in srgb, var(--qc-accent) 45%, transparent);
    }
    .qc-tabbar__pub svg { width: 24px; height: 24px; }
    /* 移动端两列瀑布流（贴近 guaqi 卡片密度） */
    .qc-waterfall { columns: 2; column-gap: 12px; }
    .qc-waterfall > .qc-post-card { margin-bottom: 12px; }
    .qc-post-card__body { padding: 12px 12px 14px; gap: 8px; }
    .qc-post-card__title { font-size: 14.5px; }
    .qc-post-card__excerpt { font-size: 12.5px; }
    .qc-meta { gap: 8px; font-size: 11.5px; }
}

/* ---------- 卡片精修：占位封面 / 标题截断 / 底部作者与统计 ---------- */
.qc-post-card__ph {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%;
    font-size: 56px; font-weight: 800; line-height: 1;
    color: var(--qc-accent); opacity: .22; text-transform: uppercase;
    background: radial-gradient(120% 120% at 30% 20%, rgba(255, 255, 255, .35), transparent 60%);
}
.qc-post-card__title a {
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.qc-post-card__foot {
    display: flex; align-items: center; justify-content: space-between; gap: 8px;
    margin-top: auto; padding-top: 4px;
}
.qc-post-card__author {
    display: inline-flex; align-items: center; gap: 6px; min-width: 0;
    color: var(--qc-text-weak); font-size: 12.5px;
}
.qc-post-card__author img { border-radius: 50%; flex: 0 0 auto; }
.qc-post-card__author span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qc-post-card__stats { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--qc-text-weak); font-size: 12px; }
.qc-post-card__stats > span { display: inline-flex; align-items: center; gap: 3px; }
.qc-post-card__stats svg { width: 14px; height: 14px; opacity: .8; }

/* 移动端：两列等高网格（取代瀑布流的参差），封面统一压住版面 */
@media (max-width: 768px) {
    .qc-waterfall { columns: auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .qc-waterfall > .qc-post-card { display: flex; flex-direction: column; width: auto; margin: 0; }
    .qc-post-card__cover { aspect-ratio: 16 / 10; }
    .qc-post-card__ph { font-size: 44px; }
    .qc-post-card__stats { gap: 7px; font-size: 11px; }
    .qc-post-card__author { font-size: 11.5px; }
}