/* ===== Reset & Variables ===== */
:root {
  --bg: #fafafa;
  --white: #ffffff;
  --navy: #131c37;
  --navy-hover: #1a2747;
  --navy-light: #dce1ec;
  --accent: #e34058;
  --accent-hover: #cc1f38;
  --accent-light: #fde8eb;
  --green: #16a34a;
  --green-light: #dcfce7;
  --gold: #eab308;
  --gold-light: #fefce8;
  --purple: #8b5cf6;
  --purple-light: #f3e8ff;
  --text: #142241;
  --text-2: #64748b;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.08);
  --ease: cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

body {
  font-family: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height:1.6;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

a { color:var(--accent); text-decoration:none; transition:color .15s var(--ease); }
a:hover { color:var(--accent-hover); }

input,select,textarea,button { font-family:inherit; font-size:inherit; color:inherit; }
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border-hover); border-radius:3px; }

/* ===== Navbar ===== */
#navbar {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  position: sticky; top:0; z-index:1000;
}
.nav-inner { max-width:1280px; margin:0 auto; display:flex; align-items:center; justify-content:space-between; padding:0 24px; height:64px; }
.logo { font-size:1.2rem; font-weight:700; color:var(--navy) !important; letter-spacing:-.01em; }
.logo span { color:var(--accent); }
.nav-links { display:flex; gap:4px; }
.nav-links a {
  padding:6px 16px; border-radius:var(--radius-xs); color:var(--text-2);
  font-size:.875rem; font-weight:450; transition:all .15s var(--ease);
}
.nav-links a:hover,.nav-links a.active { background:var(--navy-light); color:var(--navy); }
.nav-actions { display:flex; align-items:center; gap:10px; }
.nav-guest { display:flex; gap:8px; }
.nav-user { display:flex; align-items:center; gap:12px; }
.membership-badge { font-size:.72rem; font-weight:600; padding:4px 12px; border-radius:20px; letter-spacing:.02em; }
.badge-free { background:var(--navy-light); color:var(--text-3); }
.badge-vip { background:var(--gold-light); color:#a16207; }
.badge-premium { background:var(--purple-light); color:#7c3aed; }
.user-dropdown { position:relative; cursor:pointer; }
.username { font-weight:500; font-size:.9rem; padding:4px 8px; border-radius:6px; transition:background .15s; }
.username:hover { background:var(--navy-light); }
.dropdown-menu {
  display:none; position:absolute; top:calc(100% + 8px); right:0;
  background:var(--white); border:1px solid var(--border); border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lg); min-width:168px; padding:6px; z-index:100;
}
.user-dropdown:hover .dropdown-menu { display:block; }
.dropdown-menu a { display:block; padding:8px 14px; font-size:.85rem; color:var(--text); border-radius:6px; transition:background .12s; }
.dropdown-menu a:hover { background:var(--navy-light); }
.dropdown-menu hr { margin:6px; border:none; border-top:1px solid var(--border); }
.menu-toggle { display:none; background:none; border:none; font-size:1.3rem; cursor:pointer; color:var(--text); }

/* ===== Buttons ===== */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  padding:10px 22px; border:none; border-radius:var(--radius-xs); font-weight:500;
  font-size:.875rem; cursor:pointer; transition:all .15s var(--ease); white-space:nowrap;
}
.btn-sm { padding:6px 16px; font-size:.82rem; }
.btn-lg { padding:14px 32px; font-size:.95rem; }
.btn-full { width:100%; }
.btn-primary { background:var(--navy); color:#fff; }
.btn-primary:hover { background:var(--navy-hover); }
.btn-accent { background:var(--accent); color:#fff; }
.btn-accent:hover { background:var(--accent-hover); }
.btn-gold { background:var(--gold); color:#0f172a; }
.btn-gold:hover { background:#ca8a04; }
.btn-purple { background:var(--purple); color:#fff; }
.btn-purple:hover { background:#7c3aed; }
.btn-outline { background:transparent; border:1.5px solid var(--border); color:var(--text); }
.btn-outline:hover { border-color:var(--navy); color:var(--navy); background:transparent; }
.btn-secondary { background:var(--navy-light); color:var(--navy); }
.btn-secondary:hover { background:var(--border); }
.btn-ghost { background:transparent; color:var(--text-2); }
.btn-ghost:hover { background:var(--navy-light); color:var(--navy); }
.btn:disabled { opacity:.4; cursor:not-allowed; }

/* ===== Layout ===== */
.page { max-width:1280px; margin:0 auto; padding:48px 24px; }
.page-hero { padding:96px 24px 64px; text-align:center; }
.page-narrow { max-width:720px; }

/* ===== Hero ===== */
.hero-title {
  font-size:3rem; font-weight:700; letter-spacing:-.03em; line-height:1.15;
  color:var(--navy); margin-bottom:16px;
}
.hero-title mark {
  background:linear-gradient(135deg, var(--accent), #f97316);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.hero-subtitle { font-size:1.08rem; color:var(--text-2); margin-bottom:44px; }
.search-box {
  display:flex; max-width:520px; margin:0 auto;
  background:var(--white); border:1.5px solid var(--border); border-radius:50px;
  overflow:hidden; transition:all .2s var(--ease); box-shadow:var(--shadow);
}
.search-box:focus-within { border-color:var(--navy); box-shadow:0 0 0 4px rgba(19,28,55,.06); }
.search-box input {
  flex:1; border:none; padding:15px 24px; font-size:.95rem; outline:none; background:transparent;
}
.search-box input::placeholder { color:var(--text-3); }
.search-box button {
  background:var(--navy); color:#fff; border:none; padding:0 32px;
  font-weight:500; font-size:.9rem; cursor:pointer; transition:background .15s;
}
.search-box button:hover { background:var(--navy-hover); }
.stats-bar { display:flex; justify-content:center; gap:80px; margin-top:40px; }
.stat-item { text-align:center; }
.stat-num { font-size:2rem; font-weight:700; color:var(--navy); }
.stat-label { font-size:.82rem; color:var(--text-3); margin-top:4px; }

/* ===== Section Header ===== */
.section-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:28px; }
.section-header h2 { font-size:1.3rem; font-weight:650; letter-spacing:-.01em; color:var(--navy); }
.section-header a { font-size:.875rem; color:var(--text-3); }
.section-header a:hover { color:var(--text); }
.section-divider { margin:56px 0; }

/* ===== Category Pills ===== */
.category-tabs { display:flex; gap:8px; flex-wrap:wrap; padding:4px 0 32px; }
.cat-tab {
  padding:8px 20px; border-radius:50px; font-size:.84rem; font-weight:450;
  background:var(--white); border:1.5px solid var(--border);
  cursor:pointer; transition:all .15s var(--ease); white-space:nowrap; color:var(--text-2);
}
.cat-tab:hover { border-color:var(--border-hover); color:var(--text); }
.cat-tab.active { background:var(--navy); border-color:var(--navy); color:#fff; }

/* ===== Resource Cards ===== */
.resource-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(290px, 1fr)); gap:20px; }
.resource-card {
  background:var(--white); border-radius:var(--radius); border:1px solid var(--border);
  overflow:hidden; transition:all .25s var(--ease); cursor:pointer;
}
.resource-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); border-color:var(--border-hover); }
.card-cover {
  height:160px; display:flex; align-items:center; justify-content:center;
  position:relative; background:var(--navy-light);
}
.card-cover::after {
  content:''; position:absolute; inset:0;
  background:linear-gradient(180deg, transparent 50%, rgba(0,0,0,.02)); pointer-events:none;
}
.card-membership-tag {
  position:absolute; top:12px; right:12px; font-size:.68rem; font-weight:550;
  padding:4px 12px; border-radius:20px; background:rgba(255,255,255,.9);
  backdrop-filter:blur(8px); color:var(--text-2); z-index:1;
}
.card-body { padding:18px 20px 20px; }
.card-category { font-size:.76rem; font-weight:500; color:var(--accent); margin-bottom:8px; text-transform:uppercase; letter-spacing:.04em; }
.card-title { font-size:.98rem; font-weight:600; margin-bottom:8px; line-height:1.4; color:var(--text);
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-desc { font-size:.82rem; color:var(--text-2); margin-bottom:14px; line-height:1.5;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-footer { display:flex; justify-content:space-between; align-items:center; font-size:.8rem; }
.card-price { font-weight:650; font-size:1rem; color:var(--text); }
.card-price.free { color:var(--green); font-size:.92rem; }
.card-stats { display:flex; gap:14px; color:var(--text-3); font-size:.78rem; }

/* ===== Resource Detail ===== */
.resource-detail { display:grid; grid-template-columns:1fr 340px; gap:32px; }
.detail-main { background:var(--white); border-radius:var(--radius); padding:36px; border:1px solid var(--border); }
.detail-breadcrumb { margin-bottom:20px; font-size:.84rem; color:var(--text-3); }
.detail-breadcrumb a { color:var(--text-2); }
.detail-title { font-size:1.6rem; font-weight:700; letter-spacing:-.02em; margin-bottom:18px; line-height:1.3; }
.detail-meta { display:flex; gap:22px; font-size:.84rem; color:var(--text-3); margin-bottom:22px; flex-wrap:wrap; }
.detail-tags { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:24px; }
.detail-tag { background:var(--navy-light); color:var(--text-2); padding:5px 14px; border-radius:20px; font-size:.8rem; }
.detail-divider { margin:26px 0; border:none; border-top:1px solid var(--border); }
.detail-desc { line-height:1.85; color:var(--text-2); font-size:.92rem; white-space:pre-wrap; }
.detail-hidden { margin-top:16px; padding:20px 24px; border-radius:var(--radius); }
.detail-hidden.unlocked { background:rgba(16,185,129,.08); border:1px solid rgba(16,185,129,.25); }
.detail-hidden.locked { background:rgba(227,64,88,.06); border:1px dashed rgba(227,64,88,.35); text-align:center; }
.detail-hidden-badge { font-size:.78rem; font-weight:600; margin-bottom:12px; }
.detail-hidden.unlocked .detail-hidden-badge { color:var(--green); }
.detail-hidden.locked .detail-hidden-badge { color:var(--accent); }
.detail-sidebar { position:sticky; top:84px; align-self:start; }
.detail-card { background:var(--white); border-radius:var(--radius); border:1px solid var(--border); padding:28px; }
.detail-price { font-size:2.2rem; font-weight:700; letter-spacing:-.02em; margin-bottom:4px; }
.detail-price.free { color:var(--green); }
.detail-price-label { font-size:.8rem; color:var(--text-3); margin-bottom:14px; }
.detail-membership-required { margin:16px 0; padding:10px 16px; border-radius:var(--radius-xs); font-size:.82rem; font-weight:500; text-align:center; }
.membership-free { background:var(--navy-light); color:var(--text-2); }
.membership-vip { background:var(--gold-light); color:#a16207; }
.membership-premium { background:var(--purple-light); color:#7c3aed; }
.detail-info { margin-top:18px; font-size:.8rem; color:var(--text-3); }
.detail-info p { margin-bottom:6px; }

/* ===== Membership ===== */
.membership-hero { padding:72px 24px 48px; text-align:center; }
.membership-hero h1 { font-size:2.2rem; font-weight:700; letter-spacing:-.02em; color:var(--navy); margin-bottom:12px; }
.membership-hero p { font-size:1rem; color:var(--text-2); max-width:480px; margin:0 auto; }
.membership-features { display:flex; justify-content:center; gap:40px; margin:40px 0 0; flex-wrap:wrap; }
.mfeature { display:flex; align-items:center; gap:10px; font-size:.9rem; color:var(--text-2); }
.mfeature-icon { width:40px; height:40px; background:var(--accent-light); border-radius:var(--radius-sm); display:flex; align-items:center; justify-content:center; font-size:1.1rem; }
.mfeature strong { display:block; color:var(--text); font-size:.92rem; }
.mfeature small { font-size:.78rem; color:var(--text-3); }

.membership-plans { display:grid; grid-template-columns:repeat(3, 1fr); gap:24px; margin-top:48px; }
.plan-card {
  background:var(--white); border-radius:var(--radius); border:1px solid var(--border);
  padding:36px 28px; text-align:center; transition:all .25s var(--ease);
  position:relative; display:flex; flex-direction:column;
}
.plan-card:hover { transform:translateY(-2px); box-shadow:var(--shadow-md); }
.plan-card.featured {
  border-color:var(--accent); box-shadow:0 0 0 1px var(--accent);
}
.plan-badge {
  position:absolute; top:0; left:50%; transform:translate(-50%, -50%);
  background:var(--accent); color:#fff; font-size:.7rem; font-weight:600;
  padding:4px 20px; border-radius:20px; letter-spacing:.04em;
}

.plan-icon { width:52px; height:52px; margin:0 auto 18px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1.3rem; }
.plan-icon.free { background:var(--navy-light); }
.plan-icon.vip { background:var(--gold-light); }
.plan-icon.premium { background:var(--purple-light); }
.plan-icon.lifetime { background:#fee2e2; }

.plan-name { font-size:1.05rem; font-weight:650; margin-bottom:8px; color:var(--navy); }
.plan-price { font-size:2.8rem; font-weight:700; letter-spacing:-.03em; color:var(--navy); margin-bottom:4px; }
.plan-price-unit { font-size:.85rem; font-weight:450; color:var(--text-3); display:block; margin-bottom:6px; }
.plan-original { font-size:.85rem; color:var(--text-3); text-decoration:line-through; margin-bottom:24px; }

.plan-features { list-style:none; text-align:left; margin:0 0 28px; flex:1; }
.plan-features li {
  padding:10px 0; font-size:.86rem; color:var(--text-2);
  border-bottom:1px solid var(--border);
  display:flex; align-items:center; gap:8px;
}
.plan-features li:last-child { border-bottom:none; }
.plan-features li::before { content:''; width:18px; height:18px; background:var(--green); border-radius:50%; flex-shrink:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='white' viewBox='0 0 16 16'%3E%3Cpath d='M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:center; }
.plan-btn { margin-top:auto; }

/* ===== Forms ===== */
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:.82rem; font-weight:550; margin-bottom:6px; color:var(--text); }
.form-group input,.form-group select,.form-group textarea {
  width:100%; padding:10px 14px; border:1.5px solid var(--border);
  border-radius:var(--radius-xs); font-size:.9rem; transition:all .15s var(--ease); background:var(--white);
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus {
  outline:none; border-color:var(--navy); box-shadow:0 0 0 3px rgba(19,28,55,.06);
}
.form-group textarea { resize:vertical; min-height:100px; }
.form-group input::placeholder,.form-group textarea::placeholder { color:var(--text-3); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.form-card { background:var(--white); border-radius:var(--radius); padding:36px; border:1px solid var(--border); }

/* ===== Modal ===== */
.modal { display:none; position:fixed; inset:0; background:rgba(0,0,0,.45); z-index:2000;
  align-items:center; justify-content:center; padding:20px; backdrop-filter:blur(4px); }
.modal.show { display:flex; }
.modal-content { background:var(--white); border-radius:var(--radius); padding:36px;
  width:100%; max-width:400px; position:relative; box-shadow:var(--shadow-lg); animation:modalIn .2s var(--ease); }
@keyframes modalIn { from { opacity:0; transform:scale(.96) translateY(8px); } to { opacity:1; transform:scale(1); } }
.modal-close { position:absolute; top:16px; right:20px; font-size:1.3rem; cursor:pointer;
  color:var(--text-3); width:32px; height:32px; display:flex; align-items:center; justify-content:center;
  border-radius:50%; transition:all .15s; }
.modal-close:hover { background:var(--navy-light); color:var(--text); }
.modal-content h2 { font-size:1.2rem; font-weight:650; margin-bottom:24px; letter-spacing:-.01em; }
.form-switch { text-align:center; font-size:.84rem; margin-top:18px; color:var(--text-2); }

/* ===== Toast ===== */
.toast-container { position:fixed; top:24px; right:24px; z-index:3000; display:flex; flex-direction:column; gap:8px; }
.toast {
  padding:14px 20px; border-radius:var(--radius-sm); font-size:.86rem; font-weight:500;
  box-shadow:var(--shadow-md); animation:slideIn .25s var(--ease);
  max-width:360px; background:var(--white); border:1px solid var(--border);
  color:var(--text); display:flex; align-items:center; gap:10px;
}
.toast::before { font-size:1rem; flex-shrink:0; font-weight:700; }
.toast-success::before { content:'✓'; color:var(--green); }
.toast-error::before { content:'✕'; color:var(--accent); }
.toast-warning::before { content:'!'; color:var(--gold); }
@keyframes slideIn { from { transform:translateX(120%); opacity:0; } to { transform:translateX(0); opacity:1; } }

/* ===== Tables ===== */
.data-table { width:100%; border-collapse:collapse; font-size:.86rem; }
.data-table th {
  text-align:left; padding:12px 16px; font-weight:550; color:var(--text-2);
  font-size:.78rem; text-transform:uppercase; letter-spacing:.04em; border-bottom:2px solid var(--border);
}
.data-table td { padding:14px 16px; border-bottom:1px solid var(--border); color:var(--text); }
.data-table tr:hover td { background:var(--navy-light); }

/* ===== Pagination ===== */
.pagination { display:flex; justify-content:center; gap:6px; margin-top:40px; }
.pagination button {
  width:38px; height:38px; border:1.5px solid var(--border); border-radius:var(--radius-xs);
  background:var(--white); cursor:pointer; font-size:.85rem; font-weight:450;
  transition:all .15s; display:flex; align-items:center; justify-content:center;
}
.pagination button:hover { border-color:var(--border-hover); }
.pagination button.active { background:var(--navy); color:#fff; border-color:var(--navy); }

/* ===== Admin ===== */
.admin-tabs { display:flex; gap:4px; margin-bottom:32px; }
.admin-tab { padding:8px 20px; border:none; background:transparent; font-weight:450; font-size:.86rem;
  cursor:pointer; border-radius:var(--radius-xs); color:var(--text-2); transition:all .15s; }
.admin-tab:hover { background:var(--navy-light); }
.admin-tab.active { background:var(--navy); color:#fff; }
.stats-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(190px, 1fr)); gap:16px; margin-bottom:36px; }
.stat-card { background:var(--white); border-radius:var(--radius); padding:24px; border:1px solid var(--border); }
.stat-card .label { font-size:.78rem; color:var(--text-3); margin-bottom:6px; text-transform:uppercase; letter-spacing:.04em; }
.stat-card .value { font-size:1.7rem; font-weight:700; letter-spacing:-.02em; color:var(--navy); }

/* ===== Empty State ===== */
.empty-state { text-align:center; padding:80px 20px; }
.empty-state .icon { width:80px; height:80px; margin:0 auto 20px; background:var(--navy-light); border-radius:50%;
  display:flex; align-items:center; justify-content:center; font-size:2rem; }
.empty-state h3 { font-size:1.05rem; font-weight:600; color:var(--text); margin-bottom:8px; }
.empty-state p { font-size:.88rem; color:var(--text-3); margin-bottom:20px; }

/* ===== Dashboard ===== */
.dashboard-header { margin-bottom:32px; }
.dashboard-header h2 { font-size:1.4rem; font-weight:650; color:var(--navy); }
.dashboard-header .subtitle { font-size:.88rem; color:var(--text-3); margin-top:4px; }
.dashboard-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(280px, 1fr)); gap:16px; margin-bottom:32px; }
.dashboard-actions { display:grid; grid-template-columns:repeat(auto-fit, minmax(160px, 1fr)); gap:10px; }

/* ===== Download List ===== */
.download-list { display:flex; flex-direction:column; gap:8px; }
.download-item {
  display:flex; justify-content:space-between; align-items:center;
  padding:14px 18px; background:var(--white); border:1px solid var(--border);
  border-radius:var(--radius-xs); transition:border-color .15s;
}
.download-item:hover { border-color:var(--border-hover); }
.download-item .d-title { font-weight:550; color:var(--text); }
.download-item .d-title:hover { color:var(--accent); }
.download-item .d-meta { font-size:.78rem; color:var(--text-3); margin-top:2px; }
.download-item .d-time { font-size:.8rem; color:var(--text-3); white-space:nowrap; }

/* ===== Badge ===== */
.badge { font-size:.72rem; font-weight:550; padding:4px 12px; border-radius:20px; letter-spacing:.02em; display:inline-block; }

/* ===== Sort ===== */
.sort-select {
  padding:8px 14px; border:1.5px solid var(--border); border-radius:var(--radius-xs);
  font-size:.84rem; background:var(--white); cursor:pointer; color:var(--text-2);
  outline:none; transition:border-color .15s;
}
.sort-select:focus { border-color:var(--navy); }

/* ===== Responsive ===== */
@media (max-width:768px) {
  .nav-inner { padding:0 20px; }
  .nav-links { display:none; }
  .menu-toggle { display:block; }
  .nav-links.mobile-show {
    display:flex; flex-direction:column; position:absolute; top:64px; left:0; right:0;
    background:var(--white); border-bottom:1px solid var(--border); padding:12px; z-index:999;
  }
  .page { padding:32px 20px; }
  .page-hero { padding:56px 20px 40px; }
  .hero-title { font-size:1.8rem; }
  .stats-bar { gap:28px; }
  .stat-num { font-size:1.3rem; }
  .resource-grid { grid-template-columns:repeat(auto-fill, minmax(240px, 1fr)); gap:14px; }
  .resource-detail { grid-template-columns:1fr; }
  .detail-main { padding:24px; }
  .membership-plans { grid-template-columns:1fr; }
  .membership-features { gap:20px; }
  .form-row { grid-template-columns:1fr; }
  .data-table { font-size:.78rem; }
  .stats-grid { grid-template-columns:repeat(2, 1fr); }
}

/* ===== Utilities ===== */
.hidden { display:none !important; }
.flex-between { display:flex; justify-content:space-between; align-items:center; }
.flex-center { display:flex; align-items:center; justify-content:center; }
.mt-24 { margin-top:24px; }
.mt-32 { margin-top:32px; }
.mb-24 { margin-bottom:24px; }
.mb-32 { margin-bottom:32px; }
.text-center { text-align:center; }
.text-muted { color:var(--text-3); }
.text-sm { font-size:.84rem; }