/* ===== CSS Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; color: #333; line-height: 1.6; background: #fff; }
a { text-decoration: none; color: inherit; transition: all 0.3s; }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

/* ===== Header ===== */
.z31f6aheader { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); box-shadow: 0 1px 20px rgba(0,0,0,0.06); transition: all 0.3s; }
.z31f6aheader_inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 72px; }
.z31f6alogo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: #1a1a2e; }
.z31f6alogo img { height: 40px; width: 40px; border-radius: 10px; }
.z31f6alogo span { background: linear-gradient(135deg, #6366f1, #8b5cf6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.z31f6anav { display: flex; align-items: center; gap: 6px; }
.z31f6anav a { padding: 8px 20px; border-radius: 8px; font-size: 15px; font-weight: 500; color: #555; transition: all 0.3s; }
.z31f6anav a:hover { color: #6366f1; background: rgba(99,102,241,0.06); }
.z31f6anav a.current { color: #6366f1; background: rgba(99,102,241,0.1); font-weight: 600; }
.z31f6aheader_btn { padding: 10px 28px; border-radius: 50px; background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff !important; font-size: 14px; font-weight: 600; box-shadow: 0 4px 15px rgba(99,102,241,0.35); transition: all 0.3s; }
.z31f6aheader_btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(99,102,241,0.45); }
.z31f6amobile_toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.z31f6amobile_toggle span { display: block; width: 24px; height: 2px; background: #333; border-radius: 2px; transition: all 0.3s; }

/* ===== Hero Banner ===== */
.z31f6ahero { padding: 140px 24px 80px; background: linear-gradient(160deg, #0f0c29 0%, #1a1a3e 40%, #24243e 100%); position: relative; overflow: hidden; text-align: center; }
.z31f6ahero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at 30% 50%, rgba(99,102,241,0.15) 0%, transparent 50%), radial-gradient(circle at 70% 50%, rgba(139,92,246,0.1) 0%, transparent 50%); animation: z31f6afloat 20s ease-in-out infinite; }
@keyframes z31f6afloat { 0%,100% { transform: translate(0,0) rotate(0deg); } 50% { transform: translate(-2%,2%) rotate(1deg); } }
.z31f6ahero_content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; }
.z31f6ahero_badge { display: inline-block; padding: 6px 20px; border-radius: 50px; background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3); color: #a5b4fc; font-size: 13px; font-weight: 500; margin-bottom: 24px; letter-spacing: 1px; }
.z31f6ahero h1 { font-size: 52px; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 20px; }
.z31f6ahero h1 em { font-style: normal; background: linear-gradient(135deg, #818cf8, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.z31f6ahero_desc { font-size: 18px; color: rgba(255,255,255,0.65); margin-bottom: 40px; line-height: 1.8; }
.z31f6ahero_btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.z31f6abtn_primary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px; border-radius: 60px; background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; font-size: 17px; font-weight: 600; box-shadow: 0 8px 30px rgba(99,102,241,0.4); transition: all 0.3s; }
.z31f6abtn_primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(99,102,241,0.55); }
.z31f6abtn_primary svg { width: 22px; height: 22px; }
.z31f6abtn_secondary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px; border-radius: 60px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); color: #fff; font-size: 17px; font-weight: 500; transition: all 0.3s; }
.z31f6abtn_secondary:hover { background: rgba(255,255,255,0.15); transform: translateY(-3px); }
.z31f6ahero_stats { display: flex; justify-content: center; gap: 60px; margin-top: 60px; }
.z31f6ahero_stat h3 { font-size: 36px; font-weight: 800; color: #fff; }
.z31f6ahero_stat p { font-size: 14px; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* ===== Section Common ===== */
.z31f6asection { padding: 80px 24px; }
.z31f6asection_title { text-align: center; margin-bottom: 56px; }
.z31f6asection_title h2 { font-size: 36px; font-weight: 700; color: #1a1a2e; margin-bottom: 12px; }
.z31f6asection_title p { font-size: 16px; color: #888; max-width: 600px; margin: 0 auto; }
.z31f6acontainer { max-width: 1200px; margin: 0 auto; }

/* ===== Features ===== */
.z31f6afeatures { background: #f8f9ff; }
.z31f6afeatures_grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.z31f6afeature_card { background: #fff; border-radius: 20px; padding: 40px 32px; transition: all 0.4s; border: 1px solid rgba(99,102,241,0.06); position: relative; overflow: hidden; }
.z31f6afeature_card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, #6366f1, #8b5cf6); opacity: 0; transition: all 0.4s; }
.z31f6afeature_card:hover { transform: translateY(-8px); box-shadow: 0 20px 50px rgba(99,102,241,0.1); }
.z31f6afeature_card:hover::before { opacity: 1; }
.z31f6afeature_icon { width: 64px; height: 64px; border-radius: 16px; background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(139,92,246,0.1)); display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
.z31f6afeature_icon svg { width: 30px; height: 30px; color: #6366f1; }
.z31f6afeature_card h3 { font-size: 20px; font-weight: 600; color: #1a1a2e; margin-bottom: 12px; }
.z31f6afeature_card p { font-size: 14px; color: #888; line-height: 1.8; }

/* ===== Download Section ===== */
.z31f6adownload { background: linear-gradient(160deg, #0f0c29, #1a1a3e); position: relative; overflow: hidden; }
.z31f6adownload::before { content: ''; position: absolute; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%); top: -200px; right: -200px; }
.z31f6adownload_wrap { display: flex; align-items: center; gap: 60px; position: relative; z-index: 2; }
.z31f6adownload_info { flex: 1; }
.z31f6adownload_info h2 { font-size: 38px; font-weight: 700; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.z31f6adownload_info p { font-size: 16px; color: rgba(255,255,255,0.6); margin-bottom: 32px; line-height: 1.8; }
.z31f6adownload_steps { display: flex; flex-direction: column; gap: 20px; margin-bottom: 36px; }
.z31f6astep { display: flex; align-items: center; gap: 16px; }
.z31f6astep_num { width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; font-size: 16px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.z31f6astep_text { color: rgba(255,255,255,0.8); font-size: 15px; }
.z31f6adownload_qr { flex: 0 0 320px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 24px; padding: 40px; text-align: center; backdrop-filter: blur(10px); }
.z31f6adownload_qr_img { width: 200px; height: 200px; background: #fff; border-radius: 16px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; color: #999; font-size: 14px; }
.z31f6adownload_qr p { color: rgba(255,255,255,0.6); font-size: 14px; }

/* ===== Articles ===== */
.z31f6aarticles_grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.z31f6aarticle_card { background: #fff; border-radius: 16px; overflow: hidden; border: 1px solid #f0f0f0; transition: all 0.3s; }
.z31f6aarticle_card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
.z31f6aarticle_thumb { height: 200px; background: linear-gradient(135deg, #e0e7ff, #ede9fe); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.z31f6aarticle_thumb img { width: 100%; height: 100%; object-fit: cover; }
.z31f6aarticle_body { padding: 24px; }
.z31f6aarticle_body h3 { font-size: 17px; font-weight: 600; color: #1a1a2e; margin-bottom: 10px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.z31f6aarticle_body p { font-size: 13px; color: #999; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; }
.z31f6aarticle_meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: #bbb; }
.z31f6aarticle_meta span { display: flex; align-items: center; gap: 4px; }

/* ===== FAQ ===== */
.z31f6afaq { background: #f8f9ff; }
.z31f6afaq_list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.z31f6afaq_item { background: #fff; border-radius: 16px; padding: 28px 32px; border: 1px solid rgba(99,102,241,0.06); transition: all 0.3s; }
.z31f6afaq_item:hover { box-shadow: 0 8px 30px rgba(99,102,241,0.06); }
.z31f6afaq_item h3 { font-size: 17px; font-weight: 600; color: #1a1a2e; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.z31f6afaq_item h3::before { content: 'Q'; width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.z31f6afaq_item p { font-size: 14px; color: #666; line-height: 1.8; padding-left: 38px; }

/* ===== Footer ===== */
.z31f6afooter { background: #0f0c29; padding: 60px 24px 30px; }
.z31f6afooter_inner { max-width: 1200px; margin: 0 auto; }
.z31f6afooter_top { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.z31f6afooter_brand { max-width: 360px; }
.z31f6afooter_brand h3 { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.z31f6afooter_brand p { font-size: 13px; color: rgba(255,255,255,0.45); line-height: 1.8; }
.z31f6afooter_links { display: flex; gap: 60px; }
.z31f6afooter_col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.z31f6afooter_col a { display: block; font-size: 13px; color: rgba(255,255,255,0.45); margin-bottom: 10px; transition: all 0.3s; }
.z31f6afooter_col a:hover { color: #818cf8; }
.z31f6afooter_bottom { padding-top: 24px; text-align: center; font-size: 12px; color: rgba(255,255,255,0.3); }

/* ===== Breadcrumb ===== */
.z31f6abreadcrumb { padding: 100px 24px 20px; background: #f8f9ff; }
.z31f6abreadcrumb_inner { max-width: 1200px; margin: 0 auto; font-size: 14px; color: #999; }
.z31f6abreadcrumb a { color: #6366f1; }
.z31f6abreadcrumb a:hover { text-decoration: underline; }
.z31f6abreadcrumb span { margin: 0 8px; }

/* ===== List Page ===== */
.z31f6alist_header { padding: 100px 24px 40px; background: linear-gradient(160deg, #0f0c29, #1a1a3e); text-align: center; }
.z31f6alist_header h1 { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.z31f6alist_header p { font-size: 15px; color: rgba(255,255,255,0.5); }
.z31f6alist_content { padding: 50px 24px 80px; background: #f8f9ff; }
.z31f6alist_grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.z31f6apagination { max-width: 1200px; margin: 40px auto 0; display: flex; justify-content: center; gap: 8px; }
.z31f6apagination a { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 14px; border-radius: 10px; background: #fff; color: #555; font-size: 14px; border: 1px solid #e5e7eb; transition: all 0.3s; }
.z31f6apagination a:hover, .z31f6apagination a.current { background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; border-color: transparent; }

/* ===== Article Detail ===== */
.z31f6adetail { padding: 40px 24px 80px; background: #f8f9ff; }
.z31f6adetail_inner { max-width: 800px; margin: 0 auto; }
.z31f6adetail_box { background: #fff; border-radius: 20px; padding: 48px; border: 1px solid rgba(99,102,241,0.06); }
.z31f6adetail_box h1 { font-size: 28px; font-weight: 700; color: #1a1a2e; margin-bottom: 16px; line-height: 1.4; }
.z31f6adetail_meta { display: flex; gap: 20px; font-size: 13px; color: #999; margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid #f0f0f0; }
.z31f6adetail_body { font-size: 15px; color: #555; line-height: 2; }
.z31f6adetail_body p { margin-bottom: 16px; }
.z31f6adetail_body h2 { font-size: 22px; font-weight: 600; color: #1a1a2e; margin: 32px 0 16px; }
.z31f6adetail_body h3 { font-size: 18px; font-weight: 600; color: #1a1a2e; margin: 24px 0 12px; }
.z31f6adetail_body img { border-radius: 12px; margin: 16px 0; }
.z31f6adetail_tags { margin-top: 32px; padding-top: 24px; border-top: 1px solid #f0f0f0; display: flex; flex-wrap: wrap; gap: 10px; }
.z31f6adetail_tags a { padding: 6px 16px; border-radius: 50px; background: rgba(99,102,241,0.06); color: #6366f1; font-size: 13px; transition: all 0.3s; }
.z31f6adetail_tags a:hover { background: #6366f1; color: #fff; }
.z31f6adetail_prenext { margin-top: 24px; display: flex; justify-content: space-between; gap: 16px; }
.z31f6adetail_prenext a { flex: 1; padding: 20px 24px; background: #fff; border-radius: 12px; border: 1px solid #f0f0f0; font-size: 14px; color: #555; transition: all 0.3s; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.z31f6adetail_prenext a:hover { border-color: #6366f1; color: #6366f1; }

/* ===== Sidebar Layout ===== */
.z31f6awith_sidebar { max-width: 1200px; margin: 0 auto; display: flex; gap: 32px; }
.z31f6amain_content { flex: 1; min-width: 0; }
.z31f6asidebar { width: 300px; flex-shrink: 0; }
.z31f6asidebar_widget { background: #fff; border-radius: 16px; padding: 24px; margin-bottom: 24px; border: 1px solid #f0f0f0; }
.z31f6asidebar_widget h3 { font-size: 17px; font-weight: 600; color: #1a1a2e; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid #6366f1; }
.z31f6asidebar_widget ul li { padding: 10px 0; border-bottom: 1px dashed #f0f0f0; }
.z31f6asidebar_widget ul li:last-child { border-bottom: none; }
.z31f6asidebar_widget ul li a { font-size: 14px; color: #555; display: flex; justify-content: space-between; align-items: center; }
.z31f6asidebar_widget ul li a:hover { color: #6366f1; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .z31f6afeatures_grid, .z31f6aarticles_grid, .z31f6alist_grid { grid-template-columns: repeat(2, 1fr); }
    .z31f6adownload_wrap { flex-direction: column; }
    .z31f6adownload_qr { flex: none; width: 100%; max-width: 360px; }
    .z31f6afooter_top { flex-direction: column; }
    .z31f6awith_sidebar { flex-direction: column; }
    .z31f6asidebar { width: 100%; }
}
@media (max-width: 768px) {
    .z31f6anav { display: none; position: fixed; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); gap: 4px; }
    .z31f6anav.z31f6aactive { display: flex; }
    .z31f6amobile_toggle { display: flex; }
    .z31f6aheader_btn { display: none; }
    .z31f6ahero { padding: 120px 20px 60px; }
    .z31f6ahero h1 { font-size: 32px; }
    .z31f6ahero_desc { font-size: 15px; }
    .z31f6ahero_btns { flex-direction: column; align-items: center; }
    .z31f6abtn_primary, .z31f6abtn_secondary { width: 100%; max-width: 300px; justify-content: center; }
    .z31f6ahero_stats { flex-direction: column; gap: 24px; }
    .z31f6ahero_stat h3 { font-size: 28px; }
    .z31f6afeatures_grid, .z31f6aarticles_grid, .z31f6alist_grid { grid-template-columns: 1fr; }
    .z31f6asection { padding: 50px 16px; }
    .z31f6asection_title h2 { font-size: 26px; }
    .z31f6adownload_info h2 { font-size: 26px; }
    .z31f6adetail_box { padding: 24px; }
    .z31f6adetail_box h1 { font-size: 22px; }
    .z31f6adetail_prenext { flex-direction: column; }
    .z31f6afooter_links { flex-direction: column; gap: 30px; }
    .z31f6alist_header h1 { font-size: 26px; }
}