* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; padding: 0 20px; }

.platform-nav { background: var(--nav-bg); box-shadow: 0 2px 20px var(--accent-glow2); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border); }
.platform-tabs { display: flex; gap: 4px; padding: 12px 0; overflow-x: auto; }
.platform-tab { padding: 8px 20px; border: none; background: transparent; font-size: 15px; color: var(--text3); cursor: pointer; border-radius: 20px; transition: all 0.2s; white-space: nowrap; }
.platform-tab:hover { background: var(--border); color: var(--accent); }
.platform-tab.active { background: var(--accent-grad); color: var(--bg); font-weight: 700; }

.hero { position: relative; padding: 20px 20px 30px; text-align: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: var(--hero-bg); z-index: 0; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 0%, var(--bg) 100%); }
.hero-content { position: relative; z-index: 1; }
.logo { font-size: 56px; font-weight: 800; color: #fff; letter-spacing: 8px; margin-bottom: 8px; text-shadow: 0 0 30px var(--accent-glow); position: relative; display: inline-block; }
.slogan { font-size: 18px; color: rgba(255,255,255,0.85); margin-bottom: 12px; letter-spacing: 2px; }
.subtitle { font-size: 15px; color: rgba(255,255,255,0.65); margin-bottom: 20px; }
.free-badge { display: inline-block; background: var(--accent-glow2); backdrop-filter: blur(10px); color: var(--accent3); padding: 8px 20px; border-radius: 20px; font-size: 14px; border: 1px solid var(--accent-glow); }
.free-badge span { font-weight: 700; font-size: 18px; color: var(--accent2); }

.generator-section { padding: 40px 0; }
.platform-guide { background: var(--bg2); border-radius: 16px; padding: 36px 28px; margin-bottom: 20px; box-shadow: 0 4px 24px var(--shadow); border: 1px solid var(--border); text-align: center; }
.platform-guide h3 { font-size: 22px; margin-bottom: 8px; color: var(--text); }
.guide-subtitle { color: var(--text3); font-size: 15px; margin-bottom: 28px; }
.platform-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.platform-card { background: var(--bg3); border: 2px solid var(--border); border-radius: 14px; padding: 24px 12px; cursor: pointer; transition: all 0.25s ease; text-align: center; }
.platform-card:hover { border-color: var(--card-color, var(--accent)); background: var(--bg2); transform: translateY(-4px); box-shadow: 0 8px 24px var(--accent-glow); }
.platform-card-logo { width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 14px rgba(0,0,0,0.18); transition: transform 0.25s ease; }
.platform-card:hover .platform-card-logo { transform: scale(1.08); }
.platform-card-logo svg { width: 32px; height: 32px; display: block; }
.platform-card-logo span { font-size: 24px; color: #fff; font-weight: 700; font-family: "Microsoft YaHei", sans-serif; }
.platform-card h4 { font-size: 16px; color: var(--text); margin-bottom: 6px; }
.platform-card p { font-size: 12px; color: var(--text3); line-height: 1.4; }
.hot-section { background: var(--bg2); border-radius: 16px; padding: 24px; margin-bottom: 20px; box-shadow: 0 4px 24px var(--shadow); border: 1px solid var(--border); }
.hot-section h3 { font-size: 18px; margin-bottom: 16px; display: flex; justify-content: space-between; align-items: center; color: var(--text); }
.hot-list { display: flex; flex-wrap: wrap; gap: 8px; }
.hot-item { padding: 8px 16px; background: var(--bg3); border-radius: 20px; font-size: 14px; cursor: pointer; transition: all 0.2s; border: 1px solid var(--border2); color: var(--text2); }
.hot-item:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.hot-item .hot-rank { display: inline-block; background: var(--rank1); color: #fff; border-radius: 50%; width: 20px; height: 20px; line-height: 20px; text-align: center; font-size: 11px; margin-right: 6px; }
.hot-item:nth-child(n+4) .hot-rank { background: var(--rank2); }
.hot-item:nth-child(n+11) .hot-rank { background: var(--rank3); }
.loading { color: var(--text4); text-align: center; padding: 20px; }
.generator-card { background: var(--bg2); border-radius: 16px; padding: 32px; box-shadow: 0 4px 24px var(--shadow); border: 1px solid var(--border); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 600; color: var(--accent3); margin-bottom: 8px; }
.form-input, .form-select { width: 100%; padding: 12px 16px; border: 2px solid var(--border2); border-radius: 8px; font-size: 15px; transition: border-color 0.2s; background: var(--bg-input); color: var(--text); }
.form-input:focus, .form-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 12px var(--accent-glow2); }
.form-input::placeholder { color: var(--text5); }
.form-hint { font-size: 13px; color: var(--text4); margin-top: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.style-options { display: flex; flex-wrap: wrap; gap: 8px; }
.style-chip { display: inline-flex; align-items: center; padding: 8px 16px; background: var(--bg3); border-radius: 20px; font-size: 14px; cursor: pointer; transition: all 0.2s; color: var(--text2); border: 1px solid var(--border2); }
.style-chip:hover { background: var(--border2); color: var(--text); }
.style-chip input { margin-right: 6px; }
.style-chip:has(input:checked) { background: var(--accent); color: var(--bg); border-color: var(--accent); }

.btn-generate { width: 100%; padding: 16px; background: var(--accent-grad); color: var(--bg); border: none; border-radius: 8px; font-size: 17px; font-weight: 700; cursor: pointer; transition: transform 0.1s, box-shadow 0.2s; }
.btn-generate:hover { box-shadow: 0 4px 20px var(--accent-glow); }
.btn-generate:active { transform: scale(0.98); }
.btn-generate:disabled { opacity: 0.6; cursor: not-allowed; }

.result-section { margin-top: 24px; }
.result-card { background: var(--bg2); border-radius: 16px; padding: 28px; box-shadow: 0 4px 24px var(--shadow); margin-bottom: 20px; border: 1px solid var(--border); }
.result-card h3 { font-size: 18px; margin-bottom: 16px; color: var(--accent3); }
.result-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.result-actions { display: flex; gap: 8px; }
.btn-sm { padding: 6px 14px; background: var(--bg3); border: 1px solid var(--border2); border-radius: 6px; font-size: 13px; cursor: pointer; transition: all 0.2s; color: var(--text2); }
.btn-sm:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-video { padding: 8px 18px; background: var(--accent-grad); color: var(--bg); border: none; border-radius: 6px; font-size: 14px; font-weight: 700; cursor: pointer; transition: all 0.2s; box-shadow: 0 2px 8px var(--accent-glow2); }
.btn-video:hover { transform: translateY(-1px); box-shadow: 0 4px 16px var(--accent-glow); }

.titles-list { display: flex; flex-direction: column; gap: 8px; }
.title-item { padding: 12px 16px; background: var(--bg-input); border-radius: 8px; cursor: pointer; transition: all 0.2s; border: 2px solid transparent; color: var(--text); }
.title-item:hover { background: var(--bg3); border-color: var(--accent); }
.title-item.selected { background: var(--accent-glow2); border-color: var(--accent); }
.title-number { display: inline-block; width: 24px; height: 24px; line-height: 24px; text-align: center; background: var(--accent); color: var(--bg); border-radius: 50%; font-size: 12px; margin-right: 8px; font-weight: 700; }

.article-content { font-size: 16px; line-height: 1.8; color: var(--text); min-height: 200px; }
.article-content p { margin-bottom: 16px; }
.article-content .article-img-wrap { position: relative; margin: 20px 0; text-align: center; min-height: 100px; }
.article-content .article-img-wrap img { max-width: 100%; max-height: 500px; width: auto; height: auto; border-radius: 8px; display: none; margin: 0 auto; }
.article-content .article-img-wrap.loaded img { display: block; }
.article-content .article-img-wrap.loaded .article-img-loading { display: none; }
.article-content .article-img-wrap.error .article-img-loading { color: var(--text4); }
.article-content.loading { color: var(--text4); text-align: center; padding: 40px; }

.error-section { margin-top: 24px; }
.error-card { background: var(--bg2); border-radius: 12px; padding: 24px; text-align: center; color: var(--error); box-shadow: 0 4px 24px var(--shadow); border: 1px solid var(--error-border); }

.features-section { padding: 60px 0; background: var(--bg); }
.features-section h2 { text-align: center; font-size: 28px; margin-bottom: 40px; color: var(--text); text-shadow: 0 0 20px var(--accent-glow2); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
.feature-item { text-align: center; }
.feature-icon { font-size: 40px; margin-bottom: 12px; filter: drop-shadow(0 0 8px var(--accent-glow2)); }
.feature-item h4 { font-size: 17px; margin-bottom: 8px; color: var(--accent3); }
.feature-item p { font-size: 14px; color: var(--text3); }

.footer { padding: 32px 0; background: var(--footer-bg); color: var(--text4); text-align: center; border-top: 1px solid var(--border); }
.footer-hint { font-size: 13px; margin-top: 8px; color: var(--text5); }

.nav-user-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; flex-shrink: 0; }
.nav-username { font-size: 14px; font-weight: 600; color: var(--text); white-space: nowrap; }
.nav-username .role { color: var(--accent3); font-weight: 400; margin-left: 4px; }
.nav-btn { padding: 7px 18px; border-radius: 20px; font-size: 14px; font-weight: 600; text-decoration: none; transition: all 0.2s; white-space: nowrap; display: inline-block; }
.nav-btn-login { background: transparent; color: var(--accent3); border: 1.5px solid var(--accent); }
.nav-btn-login:hover { background: var(--accent); color: var(--bg); }
.nav-btn-register { background: var(--accent-grad); color: var(--bg); box-shadow: 0 2px 12px var(--accent-glow); }
.nav-btn-register:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); }
.nav-btn-secondary { padding: 6px 14px; background: var(--bg3); color: var(--text2); border-radius: 6px; font-size: 13px; text-decoration: none; transition: all 0.2s; white-space: nowrap; display: inline-block; border: 1px solid var(--border2); }
.nav-btn-secondary:hover { background: var(--accent); color: var(--bg); }
.nav-btn-admin { padding: 6px 14px; background: var(--bg3); color: var(--accent3); border-radius: 6px; font-size: 13px; font-weight: 600; text-decoration: none; transition: all 0.2s; white-space: nowrap; display: inline-block; border: 1px solid var(--border2); }
.nav-btn-admin:hover { background: var(--accent); color: var(--bg); }
.nav-logo { font-size: 20px; font-weight: 800; letter-spacing: 3px; text-decoration: none; padding: 8px 4px; white-space: nowrap; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-btn-current { opacity: 0.5; pointer-events: none; }
.platform-nav .container { max-width: 1100px; }
.admin-container { max-width: 1200px; margin: 0 auto; padding: 24px 20px; }
.admin-nav { display: flex; gap: 8px; margin-bottom: 24px; padding: 12px 16px; background: var(--bg2); border-radius: 10px; box-shadow: 0 2px 12px var(--shadow); flex-wrap: wrap; align-items: center; border: 1px solid var(--border); }
.admin-nav a { padding: 7px 16px; background: var(--bg3); border: 1px solid var(--border2); border-radius: 6px; font-size: 13px; color: var(--text2); text-decoration: none; transition: all 0.2s; white-space: nowrap; }
.admin-nav a:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }

@media (max-width: 768px) {
    .logo { font-size: 42px; letter-spacing: 6px; }
    .slogan { font-size: 16px; }
    .subtitle { font-size: 14px; }
    .generator-section { padding: 28px 0; }
    .generator-card { padding: 22px; }
    .hot-section { padding: 18px; }
    .platform-guide { padding: 24px 16px; }
    .platform-cards { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .platform-card { padding: 16px 8px; }
    .platform-card-logo { width: 44px; height: 44px; }
    .platform-card-logo span { font-size: 20px; }
    .result-card { padding: 20px; }
    .features-section { padding: 40px 0; }
    .features-section h2 { font-size: 24px; margin-bottom: 28px; }
    .features-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 18px; }
    .platform-tab { padding: 7px 14px; font-size: 14px; }
    .nav-user-actions { gap: 6px; }
    .nav-btn { padding: 6px 14px; font-size: 13px; }
    .nav-btn-secondary, .nav-btn-admin { padding: 5px 10px; font-size: 12px; }
    .nav-username { font-size: 13px; }
    .admin-container { padding: 16px 12px; }
    .admin-nav { gap: 6px; padding: 10px 12px; }
    .admin-nav a { padding: 6px 12px; font-size: 12px; }
    .container { padding: 0 14px; }
}

@media (max-width: 480px) {
    .logo { font-size: 34px; letter-spacing: 4px; }
    .slogan { font-size: 14px; letter-spacing: 1px; }
    .subtitle { font-size: 13px; }
    .free-badge { padding: 6px 14px; font-size: 13px; }
    .free-badge span { font-size: 16px; }
    .hero { padding: 16px 14px 24px; }
    .generator-section { padding: 20px 0; }
    .generator-card { padding: 16px; border-radius: 12px; }
    .hot-section { padding: 14px; border-radius: 12px; }
    .hot-section h3 { font-size: 16px; }
    .hot-item { padding: 6px 12px; font-size: 13px; }
    .result-card { padding: 16px; border-radius: 12px; }
    .result-card h3 { font-size: 16px; }
    .form-input, .form-select { padding: 10px 12px; font-size: 14px; }
    .form-label { font-size: 13px; }
    .form-hint { font-size: 12px; }
    .style-chip { padding: 6px 12px; font-size: 13px; }
    .btn-generate { padding: 14px; font-size: 16px; }
    .btn-sm { padding: 5px 10px; font-size: 12px; }
    .btn-video { padding: 7px 14px; font-size: 13px; }
    .features-section { padding: 30px 0; }
    .features-section h2 { font-size: 20px; margin-bottom: 20px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .feature-icon { font-size: 32px; }
    .feature-item h4 { font-size: 15px; }
    .feature-item p { font-size: 12px; }
    .article-content { font-size: 15px; }
    .title-item { padding: 10px 12px; }
    .platform-tab { padding: 6px 12px; font-size: 13px; }
    .platform-tabs { gap: 2px; padding: 8px 0; }
    .nav-user-actions { gap: 4px; }
    .nav-btn { padding: 5px 12px; font-size: 12px; }
    .nav-btn-secondary, .nav-btn-admin { padding: 4px 8px; font-size: 11px; }
    .nav-username { font-size: 12px; }
    .nav-username .role { display: none; }
    .container { padding: 0 10px; }
    .admin-container { padding: 12px 8px; }
    .admin-nav { gap: 4px; padding: 8px; }
    .admin-nav a { padding: 5px 10px; font-size: 11px; }
    .footer { padding: 24px 0; }
    .footer-hint { font-size: 12px; }
}

@media (max-width: 360px) {
    .logo { font-size: 28px; letter-spacing: 2px; }
    .slogan { font-size: 12px; }
    .subtitle { font-size: 12px; }
    .features-grid { grid-template-columns: 1fr; }
    .generator-card { padding: 12px; }
    .hot-section { padding: 12px; }
    .result-card { padding: 12px; }
    .platform-tab { padding: 5px 10px; font-size: 12px; }
    .nav-btn { padding: 4px 10px; font-size: 11px; }
    .nav-btn-secondary, .nav-btn-admin { padding: 3px 6px; font-size: 10px; }
}

.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 24px 20px;margin-top:60px;}
.footer-inner{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:14px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:8px;}
.footer-col a{font-size:13px;color:var(--text3);transition:color .2s;text-decoration:none;}
.footer-col a:hover{color:var(--accent);}
.footer-copyright{text-align:center;margin-top:32px;padding-top:20px;border-top:1px solid var(--border);font-size:13px;color:var(--text3);}
@media(max-width:768px){.footer-inner{grid-template-columns:repeat(2,1fr);gap:20px;}.site-footer{padding:30px 16px 16px;}}
@media(max-width:480px){.footer-inner{grid-template-columns:1fr;}}