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

:root {
    --brand: #fd7f11;
    --brand-2: #ff601e;
    --brand-3: #ffb114;
    --brand-grad: linear-gradient(89.53deg, #ff601e 0.34%, #ffb114 95.16%);

    --bg-0: #120804;
    --bg-1: #1a0d06;
    --bg-2: #221208;

    --text-0: #fff7ee;
    --text-1: #fde0c2;
    --text-2: #d4a682;

    --border: rgba(253, 127, 17, 0.18);
    --border-strong: rgba(253, 127, 17, 0.45);
    --card-bg: rgba(31, 17, 8, 0.6);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-0);
    overflow-x: hidden;
    background: var(--bg-0);
    min-height: 100vh;
}

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

.eyebrow {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: var(--brand-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-title {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-0);
    margin-bottom: 16px;
    line-height: 1.15;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-2);
    max-width: 620px;
    margin: 0 auto;
}

/* ============ Navbar ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(18, 8, 4, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    height: 100%;
}

.nav-logo-img {
    height: 38px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    flex-shrink: 0;
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-1);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--brand-3);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-grad);
    transition: width 0.3s ease;
}

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    background: var(--brand-grad);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 8px 22px rgba(255, 96, 30, 0.35);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(255, 96, 30, 0.5);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--text-0);
    transition: 0.3s;
}

/* ============ Hero ============ */
.hero {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
    background: radial-gradient(ellipse at top, rgba(255, 96, 30, 0.12) 0%, transparent 60%),
                var(--bg-0);
}

.hero-bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    opacity: 0.4;
}

.hero-bg-orb-1 {
    width: 480px;
    height: 480px;
    background: #ff601e;
    top: -100px;
    left: -120px;
}

.hero-bg-orb-2 {
    width: 420px;
    height: 420px;
    background: #ffb114;
    bottom: -120px;
    right: -100px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 820px;
    margin: 0 auto 70px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: rgba(253, 127, 17, 0.1);
    border: 1px solid rgba(253, 127, 17, 0.28);
    border-radius: 999px;
    color: var(--brand-3);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 28px;
    backdrop-filter: blur(8px);
}

.hero-badge i { font-size: 14px; }

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-0);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--text-1);
    margin-bottom: 36px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 15px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--brand-grad);
    color: white;
    box-shadow: 0 10px 30px rgba(255, 96, 30, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(255, 96, 30, 0.55);
}

.btn-secondary {
    background: rgba(253, 127, 17, 0.1);
    color: var(--brand-3);
    border: 1px solid rgba(253, 127, 17, 0.35);
}

.btn-secondary:hover {
    background: rgba(253, 127, 17, 0.2);
    border-color: rgba(253, 127, 17, 0.6);
    transform: translateY(-2px);
}

/* Hero showcase — 三张截图，中间大、两侧小 */
.hero-showcase {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 28px;
    max-width: 980px;
    margin: 0 auto;
}

.showcase-img {
    border-radius: 28px;
    display: block;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(253, 127, 17, 0.15);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.showcase-side {
    width: 240px;
    opacity: 0.7;
    transform: translateY(20px) scale(0.92);
}

.showcase-center {
    width: 300px;
    position: relative;
    z-index: 2;
}

.hero-showcase:hover .showcase-side {
    opacity: 0.9;
}

/* ============ Features (左右交错图文) ============ */
.features {
    padding: 110px 0;
    background: var(--bg-1);
    position: relative;
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 80px;
    margin-bottom: 100px;
}

.feature-row:last-child { margin-bottom: 0; }

.feature-row-reverse .feature-text { order: 2; }
.feature-row-reverse .feature-visual { order: 1; }

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(253, 127, 17, 0.12);
    border: 1px solid rgba(253, 127, 17, 0.3);
    border-radius: 999px;
    color: var(--brand-3);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.feature-headline {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-0);
    margin-bottom: 20px;
    line-height: 1.2;
}

.feature-copy {
    font-size: 1.05rem;
    color: var(--text-1);
    line-height: 1.75;
    margin-bottom: 24px;
}

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

.feature-bullets li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-1);
    font-size: 1rem;
}

.feature-bullets i {
    width: 22px;
    height: 22px;
    background: var(--brand-grad);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.feature-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.feature-visual::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    background: var(--brand-grad);
    filter: blur(80px);
    opacity: 0.25;
    border-radius: 50%;
    z-index: 0;
}

.feature-visual img {
    position: relative;
    z-index: 1;
    max-width: 340px;
    width: 100%;
    border-radius: 28px;
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55),
                0 0 0 1px rgba(253, 127, 17, 0.18);
}

/* ============ Workflow ============ */
.workflow {
    padding: 110px 0;
    background: var(--bg-0);
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.workflow-card {
    position: relative;
    padding: 36px 28px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 22px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    overflow: hidden;
}

.workflow-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    box-shadow: 0 20px 50px rgba(255, 96, 30, 0.18);
}

.workflow-number {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 3rem;
    font-weight: 900;
    background: var(--brand-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    line-height: 1;
}

.workflow-icon {
    font-size: 1.8rem;
    color: var(--brand-3);
    margin-bottom: 20px;
    display: block;
}

.workflow-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-0);
    margin-bottom: 12px;
}

.workflow-card p {
    color: var(--text-2);
    font-size: 0.95rem;
    line-height: 1.65;
}

.workflow-card-cta {
    background: var(--brand-grad);
    border-color: transparent;
}

.workflow-card-cta .workflow-icon,
.workflow-card-cta h3 {
    color: white;
}

.workflow-card-cta p {
    color: rgba(255, 255, 255, 0.92);
}

.workflow-card-cta:hover {
    box-shadow: 0 20px 50px rgba(255, 96, 30, 0.5);
}

/* ============ Gallery ============ */
.app-gallery {
    padding: 110px 0;
    background: var(--bg-1);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.gallery-item {
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(253, 127, 17, 0.2);
    aspect-ratio: 9 / 19.5;
    background: var(--bg-2);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.gallery-item:hover {
    transform: translateY(-8px);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* ============ Download ============ */
.download {
    padding: 110px 0;
    background: var(--bg-1);
}

.download-card {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
    padding: 70px 40px;
    background: linear-gradient(135deg, rgba(255, 96, 30, 0.12), rgba(255, 177, 20, 0.06));
    border: 1px solid var(--border-strong);
    border-radius: 32px;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255, 96, 30, 0.22), transparent 60%);
    pointer-events: none;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-0);
    margin: 14px 0 18px;
    position: relative;
}

.download-subtitle {
    font-size: 1.05rem;
    color: var(--text-1);
    max-width: 560px;
    margin: 0 auto 40px;
    position: relative;
}

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

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 14px 30px;
    background: var(--brand-grad);
    color: #fff;
    text-decoration: none;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(255, 96, 30, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 96, 30, 0.55);
}

.download-btn i {
    font-size: 2rem;
}

.download-btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.download-btn-label {
    font-size: 0.75rem;
    opacity: 0.9;
}

.download-btn-store {
    font-size: 1.2rem;
    font-weight: 700;
}

.download-note {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 28px;
    font-size: 0.9rem;
    color: var(--text-2);
    position: relative;
}

.download-note i {
    color: var(--brand-3);
}

/* ============ Contact ============ */
.contact {
    padding: 110px 0;
    background: var(--bg-0);
}

.contact-card {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    padding: 70px 40px;
    background: linear-gradient(135deg, rgba(255, 96, 30, 0.1), rgba(255, 177, 20, 0.06));
    border: 1px solid var(--border-strong);
    border-radius: 32px;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255, 96, 30, 0.2), transparent 60%);
    pointer-events: none;
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-0);
    margin-bottom: 18px;
    position: relative;
}

.contact-subtitle {
    font-size: 1.05rem;
    color: var(--text-1);
    margin-bottom: 36px;
    position: relative;
}

.contact-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--brand-grad);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 999px;
    box-shadow: 0 10px 30px rgba(255, 96, 30, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.contact-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 96, 30, 0.55);
}

/* ============ Footer ============ */
.footer {
    padding: 70px 0 30px;
    background: #0a0502;
    border-top: 1px solid var(--border);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.3fr 2fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo-img {
    height: 42px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    align-self: flex-start;
    flex-shrink: 0;
}

.footer-tagline {
    color: var(--text-2);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 280px;
}

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

.footer-links-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--brand-3);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-column-title i { font-size: 0.95rem; }

.footer-links-column a {
    color: var(--text-1);
    text-decoration: none;
    font-size: 0.92rem;
    transition: color 0.3s ease;
}

.footer-links-column a:hover {
    color: var(--brand-3);
}

.footer-copyright {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-2);
    opacity: 0.7;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .workflow-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .feature-row {
        gap: 50px;
    }

    .hero-title { font-size: 3rem; }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .nav-toggle { display: flex; }

    .hero { padding: 110px 0 60px; }
    .hero-title { font-size: 2.4rem; }
    .hero-subtitle { font-size: 1rem; }

    .hero-showcase {
        gap: 12px;
    }

    .showcase-side {
        width: 90px;
    }

    .showcase-center {
        width: 160px;
    }

    .section-title { font-size: 2.2rem; }

    .features, .workflow, .app-gallery, .contact, .download { padding: 80px 0; }

    .feature-row,
    .feature-row-reverse {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 70px;
    }

    .feature-row-reverse .feature-text { order: 2; }
    .feature-row-reverse .feature-visual { order: 1; }

    .feature-headline { font-size: 1.8rem; }

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

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .gallery-tab {
        padding: 10px 22px;
        font-size: 14px;
    }

    .contact-card,
    .download-card {
        padding: 50px 24px;
    }

    .contact-title,
    .download-title { font-size: 1.9rem; }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links-group {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }

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

    .btn { justify-content: center; }
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb {
    background: var(--brand-grad);
    border-radius: 5px;
}