/* ============================================
   深维工坊工作室 — Premium Design System
   Vibe: Editorial Luxury + Ethereal Glass
   ============================================ */

:root {
    /* ── Color Palette ── */
    --primary: #0067b8;
    --primary-dark: #003f6b;
    --primary-mid: #1a7fc9;
    --primary-light: #e8f2fc;
    --primary-glow: rgba(0, 103, 184, 0.08);

    --bg-warm: #fbf9f7;
    --bg-white: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.82);
    --bg-deep: #0f1a24;

    --text-display: #0f1a24;
    --text-body: #2d3f4e;
    --text-muted: #6b7f8f;
    --text-inverse: #f0f4f8;

    --border-subtle: rgba(0, 67, 120, 0.06);
    --border-glass: rgba(255, 255, 255, 0.18);

    /* ── Shadows (Tinted Blue) ── */
    --shadow-sm: 0 1px 3px rgba(0, 67, 120, 0.04);
    --shadow-md: 0 8px 32px rgba(0, 67, 120, 0.07);
    --shadow-lg: 0 20px 60px rgba(0, 67, 120, 0.10);
    --shadow-xl: 0 32px 80px rgba(0, 67, 120, 0.14);
    --shadow-inner: inset 0 1px 1px rgba(255, 255, 255, 0.5);

    /* ── Radii ── */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* ── Typography ── */
    --font-display: 'Noto Serif SC', 'Outfit', serif;
    --font-body: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* ── Motion ── */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-fast: 0.35s;
    --duration-med: 0.6s;
    --duration-slow: 0.9s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-warm);
    color: var(--text-body);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Ambient Backgrounds ── */
.bg-decoration {
    position: fixed;
    z-index: -1;
    pointer-events: none;
}

.bg-circle-1 {
    width: 600px;
    height: 600px;
    top: -15%;
    left: -10%;
    background: radial-gradient(circle, rgba(0, 103, 184, 0.05) 0%, transparent 65%);
    animation: float 30s var(--ease-smooth) infinite;
}

.bg-circle-2 {
    width: 450px;
    height: 450px;
    bottom: 8%;
    right: -8%;
    background: radial-gradient(circle, rgba(0, 103, 184, 0.04) 0%, transparent 65%);
    animation: float 24s var(--ease-smooth) infinite reverse;
}

.bg-circle-3 {
    width: 300px;
    height: 300px;
    top: 40%;
    left: 55%;
    background: radial-gradient(circle, rgba(0, 103, 184, 0.03) 0%, transparent 60%);
    animation: float 20s var(--ease-smooth) infinite 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(2deg); }
}

/* ── Noise Grain Overlay ── */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.30;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 200px 200px;
}

/* ── Floating Island Nav (Desktop) ── */
.ms-navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 12px 8px 20px;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 24px rgba(0, 67, 120, 0.06);
    width: auto;
    min-width: 0;
    max-width: calc(100% - 40px);
    transition: var(--duration-med) var(--ease-out-expo);
    transition-property: box-shadow, background, border-color;
}

.ms-navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 8px 32px rgba(0, 67, 120, 0.10);
    border-color: rgba(255, 255, 255, 0.6);
}

.ms-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-display);
    text-decoration: none;
    transition: var(--duration-fast) var(--ease-out-expo);
    white-space: nowrap;
    flex-shrink: 0;
}

.ms-logo:hover {
    color: var(--primary);
    transform: translateY(-1px);
}

.ms-logo .logo-image {
    width: 32px;
    height: 32px;
    background-image: url('/logo/Black_and_white_logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    transition: var(--duration-fast) var(--ease-out-expo);
    flex-shrink: 0;
    border-radius: 6px;
}

.ms-logo:hover .logo-image {
    transform: scale(1.06);
}

/* ── Desktop Nav Links ── */
.ms-nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2px;
}

.ms-nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    transition: var(--duration-fast) var(--ease-out-expo);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    letter-spacing: 0.3px;
}

.ms-nav-links a:hover {
    background: var(--primary-glow);
    color: var(--primary);
}

.ms-nav-links a.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 12px rgba(0, 103, 184, 0.25);
}

.ms-nav-links a i {
    font-size: 14px;
    width: 16px;
    text-align: center;
    transition: transform var(--duration-fast) var(--ease-spring);
}

.ms-nav-links a:hover i {
    transform: scale(1.12);
}

/* ── New Site Button (Desktop) ── */
.nav-site-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-mid));
    color: white !important;
    text-decoration: none;
    font-weight: 600;
    font-size: 13px;
    padding: 7px 16px 7px 18px;
    border-radius: var(--radius-full);
    transition: var(--duration-fast) var(--ease-out-expo);
    white-space: nowrap;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.15);
    letter-spacing: 0.3px;
}

.nav-site-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 103, 184, 0.3);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.nav-site-btn i {
    font-size: 12px;
    transition: transform var(--duration-fast) var(--ease-spring);
}

.nav-site-btn:hover i {
    transform: translate(2px, -2px);
}

.nav-site-mobile {
    display: none !important;
}

/* ── Mobile Menu Toggle ── */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-display);
    cursor: pointer;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    transition: var(--duration-fast) var(--ease-out-expo);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.menu-toggle:hover {
    background: var(--primary-glow);
}

/* ── Scroll Entry Animations ── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: var(--duration-slow) var(--ease-out-expo);
    transition-property: opacity, transform;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Double-Bezel Card Architecture ── */
.card-shell {
    background: rgba(0, 67, 120, 0.03);
    padding: 6px;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-subtle);
    transition: var(--duration-med) var(--ease-out-expo);
    position: relative;
}

.card-core {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: calc(var(--radius-2xl) - 6px);
    box-shadow: var(--shadow-inner), var(--shadow-sm);
    padding: 40px 32px;
    height: 100%;
    transition: var(--duration-med) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.card-shell:hover {
    background: rgba(0, 103, 184, 0.06);
    border-color: rgba(0, 103, 184, 0.12);
}

.card-shell:hover .card-core {
    box-shadow: var(--shadow-inner), var(--shadow-lg);
    transform: translateY(-2px);
}

/* ── Double-Bezel Variant (Darker / Glass) ── */
.card-shell-glass {
    background: rgba(255, 255, 255, 0.06);
    padding: 6px;
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--duration-med) var(--ease-out-expo);
}

.card-core-glass {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: calc(var(--radius-2xl) - 6px);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.06), 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 40px 32px;
    height: 100%;
    transition: var(--duration-med) var(--ease-out-expo);
}

.card-shell-glass:hover {
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(255, 255, 255, 0.15);
}

.card-shell-glass:hover .card-core-glass {
    transform: translateY(-2px);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.08), 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* ── Premium CTA / Nested Button ── */
.btn-prime {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 14px 16px 14px 28px;
    border-radius: var(--radius-full);
    transition: var(--duration-fast) var(--ease-out-expo);
    border: none;
    cursor: pointer;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn-prime::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 60%);
    opacity: 0;
    transition: var(--duration-fast) var(--ease-out-expo);
}

.btn-prime:hover::before {
    opacity: 1;
}

.btn-prime:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0, 103, 184, 0.30);
    background: var(--primary-dark);
}

.btn-prime:active {
    transform: scale(0.97);
}

.btn-prime .btn-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    font-size: 14px;
    transition: var(--duration-fast) var(--ease-spring);
    flex-shrink: 0;
}

.btn-prime:hover .btn-icon-wrap {
    transform: translate(3px, -2px) scale(1.05);
    background: rgba(255, 255, 255, 0.22);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    color: var(--text-body);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    padding: 14px 24px;
    border-radius: var(--radius-full);
    transition: var(--duration-fast) var(--ease-out-expo);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    letter-spacing: 0.3px;
}

.btn-ghost:hover {
    background: var(--primary-glow);
    border-color: rgba(0, 103, 184, 0.15);
    transform: translateY(-1px);
}

.btn-ghost:active {
    transform: scale(0.97);
}

/* ── Section Spacing ── */
.section {
    padding: 120px 5%;
    max-width: 1320px;
    margin: 0 auto;
}

.section-sm {
    padding: 80px 5%;
    max-width: 1320px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-display);
    margin-bottom: 16px;
    text-wrap: balance;
    letter-spacing: 1px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto 64px;
    line-height: 1.7;
}

/* ── Section Eyebrow Badge ── */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-glow);
    color: var(--primary);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    border: 1px solid rgba(0, 103, 184, 0.08);
}

/* ── Full-Width Section ── */
.full-width-section {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding-left: 5%;
    padding-right: 5%;
}

/* ── Footer ── */
.footer {
    background: var(--bg-deep);
    color: var(--text-muted);
    padding: 48px 5% 32px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 28px;
    margin-bottom: 20px;
    list-style: none;
    padding: 0;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--duration-fast) var(--ease-out-expo);
    padding: 4px 0;
    border-bottom: 1px solid transparent;
}

.footer-links a:hover {
    color: #b0c4d8;
    border-bottom-color: var(--primary-mid);
}

.footer-copyright {
    color: #4a5a6a;
    font-size: 13px;
    letter-spacing: 0.5px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .ms-navbar {
        top: 12px;
        padding: 6px 10px 6px 16px;
        max-width: calc(100% - 24px);
        border-radius: 20px;
    }

    .menu-toggle {
        display: flex;
    }

    .ms-nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100dvh;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(30px) saturate(1.4);
        -webkit-backdrop-filter: blur(30px) saturate(1.4);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 8px;
        padding: 80px 24px;
        border-radius: 0;
        box-shadow: none;
        opacity: 0;
        visibility: hidden;
        transition: var(--duration-med) var(--ease-out-expo);
        transition-property: opacity, visibility;
        z-index: 999;
    }

    .ms-nav-links.active {
        opacity: 1;
        visibility: visible;
    }

    .ms-nav-links a {
        font-size: 18px;
        padding: 14px 28px;
        border-radius: var(--radius-md);
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .nav-site-btn {
        display: none;
    }

    .nav-site-mobile {
        display: block !important;
    }

    .nav-site-mobile a {
        margin-top: 8px;
        border-top: 1px solid var(--border-subtle);
        padding-top: 16px !important;
        color: var(--primary) !important;
    }

    .section {
        padding: 80px 5%;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 12px;
    }

    .section-subtitle {
        margin-bottom: 48px;
    }

    .card-core {
        padding: 28px 20px;
    }

    .bg-circle-1, .bg-circle-2, .bg-circle-3 {
        opacity: 0.35;
    }

    .footer {
        padding: 36px 5% 24px;
    }

    .footer-links {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 60px 4%;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 36px;
    }

    .card-core {
        padding: 24px 16px;
    }

    .btn-prime {
        padding: 12px 14px 12px 22px;
        font-size: 14px;
    }

    .btn-prime .btn-icon-wrap {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .btn-ghost {
        padding: 12px 18px;
        font-size: 14px;
    }
}