/* ============================================
   Opentink - Modern AI Style Theme
   White minimalist design with indigo accent
   ============================================ */

/* === CSS Variables === */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent: #0ea5e9;
    --accent-dark: #0284c7;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(99,102,241,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* === Utility Classes === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.op-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Page Banner (inner pages) ===== */
.op-page-banner {
    position: relative;
    padding: 48px 0 36px;
    background: #ffffff;
    overflow: hidden;
    text-align: center;
    border-bottom: 1px solid #f1f5f9;
}

.op-page-banner-bg {
    position: absolute;
    inset: 0;
    opacity: 0.5;
    background:
        /* 顶部发光 */
        radial-gradient(ellipse 70% 40% at 50% 0%, rgba(99,102,241,0.07) 0%, transparent 100%),
        /* 左侧网格装饰 */
        repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(99,102,241,0.025) 40px, rgba(99,102,241,0.025) 41px),
        repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(99,102,241,0.025) 40px, rgba(99,102,241,0.025) 41px),
        /* 右下角 AI 圆点装饰 */
        radial-gradient(circle 3px at 85% 20%, rgba(99,102,241,0.15) 0%, transparent 100%),
        radial-gradient(circle 2px at 90% 35%, rgba(14,165,233,0.12) 0%, transparent 100%),
        radial-gradient(circle 2px at 80% 50%, rgba(99,102,241,0.10) 0%, transparent 100%),
        radial-gradient(circle 3px at 15% 30%, rgba(14,165,233,0.10) 0%, transparent 100%),
        radial-gradient(circle 2px at 10% 50%, rgba(99,102,241,0.08) 0%, transparent 100%);
}

.op-page-banner-content {
    position: relative;
    z-index: 2;
}

.op-page-title {
    font-size: 28px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
    line-height: 1.3;
}

.op-page-desc {
    font-size: 14px;
    color: #64748b;
    max-width: 560px;
    margin: 0 auto 10px;
    line-height: 1.5;
}

.op-page-breadcrumb {
    font-size: 13px;
    color: #94a3b8;
}

.op-page-breadcrumb a {
    color: #6366f1;
    text-decoration: none;
    transition: color .2s;
}

.op-page-breadcrumb a:hover {
    color: #4f46e5;
}

.op-breadcrumb-sep {
    margin: 0 6px;
    color: #cbd5e1;
}

/* ===== Section ===== */
.op-section {
    padding: 80px 0;
}

/* ===== Empty & Pagination ===== */
.op-empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.op-pagination {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 48px;
}

.op-page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    text-decoration: none;
    transition: var(--transition);
}

.op-page-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.op-page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== Category Filter Tabs ===== */
.op-cat-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.op-cat-tab {
    display: inline-block;
    padding: 10px 28px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition);
}

.op-cat-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.op-cat-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}

/* ===== Grid Layouts ===== */
.op-grid {
    display: grid;
    gap: 24px;
}

.op-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ===== Card ===== */
.op-card {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid #f1f5f9;
    transition: var(--transition);
}

.op-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.op-card-img {
    display: block;
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #f8fafc;
}

.op-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.op-card:hover .op-card-img img {
    transform: scale(1.05);
}

.op-card-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #cbd5e1;
}

.op-card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    color: #fff;
}

.badge-indigo {
    background: linear-gradient(135deg, #6366f1, #818cf8);
}

.badge-blue {
    background: linear-gradient(135deg, #0ea5e9, #38bdf8);
}

.badge-green {
    background: linear-gradient(135deg, #059669, #34d399);
}

.badge-orange {
    background: linear-gradient(135deg, #d97706, #f59e0b);
}

.badge-green-lite {
    background: linear-gradient(135deg, #059669, #34d399);
}

.op-card-body {
    padding: 20px;
}

.op-card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.op-card-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.op-card-title a:hover {
    color: var(--primary);
}

.op-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.op-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.op-card-tech {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
}

.op-tech-label {
    color: #94a3b8;
    margin-right: 4px;
}

.op-card-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.op-card-price-original {
    font-size: 14px;
    color: #94a3b8;
    text-decoration: line-through;
    margin-right: 8px;
}

.op-price-contact {
    font-size: 14px;
    color: #0ea5e9;
    font-weight: 500;
}

.op-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

.op-card-link:hover {
    color: var(--primary-dark);
}

@media (max-width: 1024px) {
    .op-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .op-grid-3 { grid-template-columns: 1fr; }
    .op-cat-tabs { gap: 8px; }
    .op-cat-tab { padding: 8px 20px; font-size: 14px; }
}

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.gradient-text {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* === Glassmorphism Navbar === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99,102,241,0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

.navbar-brand img {
    height: 36px;
    width: auto;
}

.navbar-brand:hover {
    color: var(--primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.navbar-menu li a {
    display: block;
    padding: 8px 18px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar-menu li a:hover,
.navbar-menu li a.active {
    color: var(--primary);
    background: rgba(99,102,241,0.08);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-switch {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.lang-switch a {
    padding: 4px 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 6px;
    transition: var(--transition);
}

.lang-switch a.active {
    background: var(--bg-white);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-login {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--bg-gradient);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99,102,241,0.4);
    color: #fff;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: transparent;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border: 2px solid var(--primary);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    border: none;
    background: none;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8faff 0%, #eef2ff 50%, #f0f9ff 100%);
}

.hero-bg-animation {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.hero-bg-animation:nth-child(2) {
    top: auto;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14,165,233,0.08) 0%, transparent 70%);
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(99,102,241,0.1);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--bg-gradient);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99,102,241,0.4);
    color: #fff;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--bg-white);
    color: var(--primary);
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(99,102,241,0.2);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(99,102,241,0.05);
    transform: translateY(-2px);
}

/* === Cards === */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-body {
    padding: 24px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.card-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

/* === Product Grid === */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
    position: relative;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.product-card .card-image {
    height: 200px;
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1;
}

.product-badge.software {
    background: rgba(99,102,241,0.12);
    color: var(--primary);
}

.product-badge.service {
    background: rgba(14,165,233,0.12);
    color: var(--accent);
}

.product-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.product-price .original {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-left: 8px;
    font-weight: 400;
}

/* === News Grid === */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.news-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}

.news-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.news-card .card-image {
    height: 200px;
    background: linear-gradient(135deg, #f0f9ff, #eef2ff);
}

.news-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.news-card .card-body {
    padding: 20px;
}

/* === CTA Section === */
.cta-section {
    padding: 80px 0;
    background: var(--bg-gradient);
    text-align: center;
    color: #fff;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.cta-section .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* === Footer === */
.footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer p {
    font-size: 14px;
    line-height: 1.8;
    color: #94a3b8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #94a3b8;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    color: #94a3b8;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: #64748b;
}

/* === Page Header (internal pages) === */
.page-header {
    padding: 120px 0 48px;
    background: linear-gradient(135deg, #f8faff 0%, #eef2ff 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-header p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* === Forms === */
.form-card {
    max-width: 480px;
    margin: 0 auto;
    padding: 40px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0,0,0,0.04);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    color: var(--text-primary);
    background: var(--bg-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    resize: vertical;
    min-height: 120px;
    transition: var(--transition);
}

.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    background: var(--bg-white);
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='2' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

/* === Auth Pages === */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px;
    background: linear-gradient(135deg, #f8faff 0%, #eef2ff 50%, #f0f9ff 100%);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* === Contact Page === */
.contact-section {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info {
    padding: 32px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.contact-info-item .icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(99,102,241,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-info-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-info-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* === Breadcrumb === */
.breadcrumb {
    padding: 100px 0 20px;
    background: var(--bg-light);
    font-size: 14px;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb span {
    color: var(--text-muted);
    margin: 0 8px;
}

/* === Feature Section === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 32px 24px;
    text-align: center;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(14,165,233,0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* === Tab Filters === */
.tab-filters {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.tab-filter {
    padding: 8px 22px;
    border: 2px solid #e2e8f0;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
}

.tab-filter:hover,
.tab-filter.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99,102,241,0.06);
}

/* === Pagination === */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination .current {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* === Sidebar === */
.sidebar {
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.sidebar h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
}

.sidebar-links {
    list-style: none;
}

.sidebar-links li {
    margin-bottom: 4px;
}

.sidebar-links a {
    display: block;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.sidebar-links a:hover,
.sidebar-links a.active {
    background: rgba(99,102,241,0.08);
    color: var(--primary);
}

/* === Content Layout (with sidebar) === */
.content-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 36px;
}

/* === Alert / Notification === */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* === Back to Top === */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* === Two Column Layout === */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
}

/* === Detail Page Content === */
.detail-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-primary);
}

.detail-content h1, .detail-content h2, .detail-content h3 {
    margin-top: 28px;
    margin-bottom: 12px;
}

.detail-content p {
    margin-bottom: 16px;
}

.detail-content img {
    border-radius: var(--radius-sm);
    margin: 16px 0;
}

/* === Download Table === */
.download-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.download-table th,
.download-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
    font-size: 14px;
}

.download-table th {
    background: var(--bg-light);
    font-weight: 600;
    color: var(--text-secondary);
}

.download-table tr:hover td {
    background: #f8fafc;
}

/* === Member Dashboard === */
.member-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    padding: 24px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.04);
    text-align: center;
}

.stat-card .number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* === Responsive === */
@media (max-width: 992px) {
    .hero h1 { font-size: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .content-with-sidebar { grid-template-columns: 1fr; }
    .two-col { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .navbar-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        padding: 16px;
        border-bottom: 1px solid rgba(0,0,0,0.06);
        box-shadow: var(--shadow-lg);
    }
    .navbar-menu.open { display: flex; }
    .navbar-actions .btn-login span { display: none; }
    .hero { min-height: auto; padding: 100px 0 60px; }
    .hero h1 { font-size: 32px; }
    .hero p { font-size: 16px; }
    .section-title { font-size: 26px; }
    .product-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 26px; }
    .navbar-brand { font-size: 18px; }
    .btn-primary, .btn-secondary { padding: 12px 24px; font-size: 14px; }
}