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

:root {
    --color-primary: #1a1f36;
    --color-primary-light: #2d3250;
    --color-accent: #00d4aa;
    --color-accent-light: #00f0c0;
    --color-accent-glow: rgba(0, 212, 170, 0.15);
    --color-bg: #faf9f7;
    --color-bg-warm: #f5f0eb;
    --color-bg-card: #ffffff;
    --color-text: #1a1f36;
    --color-text-secondary: #6b7280;
    --color-text-light: #9ca3af;
    --color-border: #e5e7eb;
    --color-gradient-start: #fef7ed;
    --color-gradient-end: #fdf2f8;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 60px rgba(0, 212, 170, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ===== Scroll Animations ===== */
.anim-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.anim-item.visible {
    opacity: 1;
    transform: translateY(0) !important;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 249, 247, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    background: rgba(250, 249, 247, 0.95);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.5px;
}

.nav-badge {
    font-size: 11px;
    font-weight: 500;
    color: var(--color-text-light);
    background: rgba(0,0,0,0.05);
    padding: 2px 8px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.nav-download-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.nav-download-btn:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 24px 80px;
    background: linear-gradient(180deg, var(--color-gradient-start) 0%, var(--color-bg) 60%);
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    letter-spacing: 1px;
    font-weight: 400;
}

.hero-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.hero-domain {
    font-size: 18px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 40px;
    letter-spacing: 2px;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 28px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
    white-space: nowrap;
}

.btn-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-icon {
    width: 18px;
    height: 18px;
    display: block;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: #fff;
    color: var(--color-primary);
    border: 1.5px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

/* ===== Hero Mockup ===== */
.hero-mockup {
    position: relative;
    max-width: 960px;
    width: 100%;
    margin-top: 60px;
    z-index: 2;
}

.mockup-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(ellipse, rgba(0, 212, 170, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.mockup-img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0,0,0,0.03);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-mockup:hover .mockup-img {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ===== Highlights Bar ===== */
.highlights {
    padding: 60px 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
}

.highlight-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
}

.highlight-icon svg {
    width: 22px;
    height: 22px;
}

.highlight-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.highlight-text strong {
    color: var(--color-primary);
    font-weight: 700;
    display: block;
    font-size: 15px;
    margin-bottom: 2px;
}

/* ===== Feature Sections ===== */
.feature-section {
    padding: 120px 0;
}

.feature-section-alt {
    background: linear-gradient(180deg, var(--color-bg-warm) 0%, var(--color-bg) 100%);
}

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.feature-block-reverse {
    grid-template-columns: 1fr 1fr;
}

.feature-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent);
    background: var(--color-accent-glow);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.feature-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.3;
    margin-bottom: 20px;
}

.feature-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.feature-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md), 0 0 0 1px var(--color-accent-glow);
    transform: translateY(-2px);
}

.card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
    margin-bottom: 14px;
}

.card-icon svg {
    width: 20px;
    height: 20px;
}

.feature-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.feature-image {
    position: relative;
}

.feature-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-image:hover img {
    transform: scale(1.02);
}

/* ===== Skills Section ===== */
.skills-section {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-gradient-start) 50%, var(--color-bg) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.skill-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
    cursor: default;
}

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

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.skill-icon svg {
    width: 24px;
    height: 24px;
}

.skill-icon-blue { background: #eff6ff; color: #3b82f6; }
.skill-icon-green { background: #f0fdf4; color: #22c55e; }
.skill-icon-purple { background: #faf5ff; color: #a855f7; }
.skill-icon-orange { background: #fff7ed; color: #f97316; }
.skill-icon-red { background: #fef2f2; color: #ef4444; }
.skill-icon-teal { background: #f0fdfa; color: #14b8a6; }
.skill-icon-indigo { background: #eef2ff; color: #6366f1; }
.skill-icon-pink { background: #fdf2f8; color: #ec4899; }
.skill-icon-amber { background: #fffbeb; color: #f59e0b; }

.skill-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.skill-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.skills-more {
    text-align: center;
    margin-top: 40px;
    font-size: 15px;
    color: var(--color-text-light);
    font-weight: 500;
}

/* ===== Trust Section ===== */
.trust-section {
    padding: 120px 0;
    background: var(--color-primary);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.trust-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.trust-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.trust-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.trust-content .feature-label {
    background: rgba(0, 212, 170, 0.15);
    color: var(--color-accent-light);
}

.trust-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 170, 0.15);
    border-radius: 50%;
    margin: 0 auto 24px;
    color: var(--color-accent-light);
}

.trust-icon svg {
    width: 32px;
    height: 32px;
}

.trust-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.3;
}

.trust-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.75);
    line-height: 1.9;
    margin-bottom: 40px;
}

.trust-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.trust-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255,255,255,0.9);
}

.trust-feature svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent-light);
    flex-shrink: 0;
}

/* ===== Scenarios Section ===== */
.scenarios-section {
    padding: 120px 0;
    background: var(--color-bg);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0;
    transition: var(--transition);
}

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

.scenario-card:hover::before {
    opacity: 1;
}

.scenario-number {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 16px;
    color: rgba(0, 212, 170, 0.2);
}

.scenario-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

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

/* ===== CTA Section ===== */
.cta-section {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-gradient-start) 50%, var(--color-gradient-end) 100%);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.cta-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    padding: 32px 0;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.footer-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.footer-divider {
    color: var(--color-border);
}

.footer-copyright {
    font-size: 13px;
    color: var(--color-text-light);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .feature-block,
    .feature-block-reverse {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 20px 40px;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .highlights-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-section {
        padding: 80px 0;
    }

    .feature-title,
    .section-title,
    .trust-title,
    .cta-title {
        font-size: 28px;
    }

    .feature-cards {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .scenarios-grid {
        grid-template-columns: 1fr;
    }

    .trust-features {
        flex-direction: column;
        align-items: center;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }

    .nav-inner {
        padding: 0 16px;
    }

    .container {
        padding: 0 16px;
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}

/* ===== Selection ===== */
::selection {
    background: var(--color-accent);
    color: #fff;
}