/* ==========================================================================
   TZooAi - AI Technology Brand Official Homepage
   Theme: Pure Modern Light Theme (亮色系暖阳活力橙)
   Aesthetics: Clean White, Warm Orange Accents, Soft Glassmorphism, Premium Shadows
   ========================================================================== */

:root {
    --bg-dark: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(226, 232, 240, 0.9);
    --card-border-hover: rgba(255, 106, 0, 0.45);
    
    --primary: #ff6a00;
    --primary-glow: rgba(255, 106, 0, 0.25);
    --secondary: #ff9e00;
    --purple-glow: #ff4500;
    --emerald-accent: #10b981;
    --coral-accent: #f43f5e;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace, Consolas, Monaco;

    --radius-xl: 20px;
    --radius-lg: 14px;
    --radius-md: 10px;
    --radius-sm: 6px;

    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Basic Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    color-scheme: light;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 106, 0, 0.3);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Background Canvas Layer */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* Light Mode Soft Glow Orbs */
.bg-glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.35;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 106, 0, 0.25) 0%, transparent 70%);
    top: -150px;
    left: 5%;
    animation: orbFloat 14s infinite alternate ease-in-out;
}

.orb-2 {
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, rgba(255, 158, 0, 0.2) 0%, transparent 70%);
    top: 35%;
    right: -200px;
    animation: orbFloat 18s infinite alternate-reverse ease-in-out;
}

.orb-3 {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(255, 85, 0, 0.18) 0%, transparent 70%);
    bottom: 5%;
    left: -100px;
}

@keyframes orbFloat {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(60px, 40px) scale(1.1); }
}

/* Main Container Wrapper */
.app-wrapper {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
}

.gradient-text {
    background: linear-gradient(135deg, #0f172a 0%, #ff6a00 55%, #ff9e00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border-radius: 30px;
    background: rgba(255, 106, 0, 0.08);
    border: 1px solid rgba(255, 106, 0, 0.25);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 56px auto;
}

.section-header h2 {
    font-size: 2.6rem;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.15rem;
}

/* ==========================================================================
   Header Navigation Bar & Enlarged Logo
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 180px; /* 极大幅度扩展导航栏高度以容纳翻倍超大 Logo */
    z-index: 100;
    transition: var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    height: 100px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.brand-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

/* 翻倍超大尺寸霸气 Logo (155px 高度) */
.brand-logo-img {
    height: 155px; /* 翻倍放大 Logo 尺寸 */
    width: auto;
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    filter: drop-shadow(0 6px 20px rgba(255, 106, 0, 0.35));
    transition: var(--transition-normal);
}

.navbar.scrolled .brand-logo-img {
    height: 75px;
}

.brand-logo-img:hover {
    transform: scale(1.06);
    filter: drop-shadow(0 10px 28px rgba(255, 106, 0, 0.55));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition-fast);
    position: relative;
    padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    outline: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    box-shadow: 0 6px 20px rgba(255, 106, 0, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(255, 106, 0, 0.5);
    color: #fff;
}

.btn-secondary {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 1);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.btn-secondary:hover {
    background: #f8fafc;
    border-color: rgba(255, 106, 0, 0.4);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-glow {
    position: relative;
    overflow: hidden;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding-top: 270px;
    padding-bottom: 110px;
    position: relative;
    text-align: center;
}

.hero-content {
    max-width: 940px;
    margin: 0 auto;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(255, 106, 0, 0.08);
    border: 1px solid rgba(255, 106, 0, 0.25);
    border-radius: 30px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(255, 106, 0, 0.1);
}

.hero-pill i {
    color: var(--primary);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 24px;
    color: #0f172a;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 780px;
    margin: 0 auto 44px auto;
    font-weight: 400;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 70px;
}

.hero-actions .btn {
    padding: 16px 36px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

/* Key Stats Grid */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 50px;
}

.stat-card {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-xl);
    padding: 28px 20px;
    backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.stat-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(255, 106, 0, 0.12), 0 5px 15px rgba(0, 0, 0, 0.04);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==========================================================================
   Product Ecosystem Grid
   ========================================================================== */
.ecosystem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

@media (max-width: 992px) {
    .ecosystem-grid {
        grid-template-columns: 1fr;
    }
}

.eco-card {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-xl);
    padding: 40px;
    backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.eco-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 25px 45px rgba(255, 106, 0, 0.12), 0 5px 15px rgba(0, 0, 0, 0.04);
}

.eco-badge {
    position: absolute;
    top: 28px;
    right: 28px;
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 20px;
    background: rgba(255, 106, 0, 0.08);
    border: 1px solid rgba(255, 106, 0, 0.25);
    color: var(--primary);
    font-weight: 700;
}

.eco-icon {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    background: rgba(255, 106, 0, 0.08);
    border: 1px solid rgba(255, 106, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--primary);
}

.eco-title {
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: #0f172a;
}

.eco-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 28px;
    flex: 1;
}

.eco-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 22px;
    border-top: 1px solid rgba(226, 232, 240, 0.8);
}

.eco-features li {
    font-size: 13px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.eco-features i {
    color: var(--primary);
    font-size: 13px;
}

/* ==========================================================================
   Model Ecosystem Cards
   ========================================================================== */
.models-section {
    padding: 110px 0;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 26px;
}

.model-card {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-xl);
    padding: 26px;
    backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.03);
}

.model-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 18px 36px rgba(255, 106, 0, 0.12);
}

.model-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.model-badge {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-openai { background: rgba(255, 106, 0, 0.1); color: var(--primary); border: 1px solid rgba(255, 106, 0, 0.25); }
.badge-anthropic { background: rgba(255, 158, 0, 0.1); color: #ff8800; border: 1px solid rgba(255, 158, 0, 0.25); }
.badge-gemini { background: rgba(255, 85, 0, 0.1); color: #ff5500; border: 1px solid rgba(255, 85, 0, 0.25); }
.badge-deepseek { background: rgba(255, 120, 0, 0.1); color: #ff6a00; border: 1px solid rgba(255, 120, 0, 0.25); }

.model-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 106, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--primary);
}

.model-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #0f172a;
}

.model-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features-section {
    padding: 110px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: #ffffff;
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-xl);
    padding: 36px;
    backdrop-filter: blur(16px);
    transition: var(--transition-normal);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.feature-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(255, 106, 0, 0.12);
}

.feature-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(255, 106, 0, 0.12), rgba(255, 158, 0, 0.12));
    border: 1px solid rgba(255, 106, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--primary);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 12px;
    color: #0f172a;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.65;
}

/* ==========================================================================
   CTA Banner & Footer
   ========================================================================== */
.cta-section {
    padding: 80px 0 120px 0;
}

.cta-banner {
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 243, 235, 0.9) 100%);
    border: 1px solid rgba(255, 106, 0, 0.3);
    border-radius: 32px;
    padding: 70px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 25px 60px rgba(255, 106, 0, 0.15), 0 5px 20px rgba(0, 0, 0, 0.03);
}

.cta-banner h2 {
    font-size: 2.8rem;
    margin-bottom: 18px;
}

.cta-banner p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 660px;
    margin: 0 auto 40px auto;
}

.footer {
    background: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.9);
    padding: 70px 0 35px 0;
    font-size: 14px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 18px;
    font-size: 14px;
    max-width: 320px;
}

/* 翻倍放大 Footer 中的 Logo */
.footer-brand .brand-logo-img {
    height: 140px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 22px;
    color: #0f172a;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 35px;
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 13px;
}

/* ==========================================================================
   Modals & Toasts
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(12px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    background: #ffffff;
    border: 1px solid rgba(255, 106, 0, 0.3);
    border-radius: 28px;
    width: 100%;
    max-width: 500px;
    padding: 36px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15), 0 0 30px rgba(255, 106, 0, 0.15);
    transform: scale(0.9);
    transition: transform 0.3s ease;
    position: relative;
}

.modal-overlay.active .modal-box {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 22px;
    cursor: pointer;
}

.modal-title {
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.modal-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 26px;
}

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

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

.form-input {
    width: 100%;
    background: #f8fafc;
    border: 1px solid rgba(226, 232, 240, 1);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition-fast);
}

.form-input:focus {
    border-color: var(--primary);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.12);
}

.toast-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: #ffffff;
    border: 1px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 14px 24px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 10px 30px rgba(255, 106, 0, 0.18), 0 4px 12px rgba(0, 0, 0, 0.05);
    animation: toastIn 0.3s forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 992px) {
    .nav-menu { display: none; }
    .mobile-toggle { display: block; }
    .hero-title { font-size: 2.8rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .hero-stats { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
}