/*
版本：V2.0
时间：2025-12-26 19:00
申明：禁止拷贝，否则投诉到底。
*/

/* =====================================
   Base Typography
===================================== */
body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
}

/* =====================================
   Theme Variables (Light Default)
===================================== */
:root {
    color-scheme: light dark;
    --green-primary-start: #45f4b0;
    --green-primary-end: #16c978;
    --green-primary-text: #042616;
    --green-primary-glow: rgba(22, 201, 120, 0.24);
    --green-primary-glow-strong: rgba(22, 201, 120, 0.38);
    --green-secondary-bg: rgba(22, 201, 120, 0.12);
    --green-secondary-border: rgba(22, 201, 120, 0.28);
    --green-secondary-hover-bg: rgba(22, 201, 120, 0.18);
    --green-secondary-text: #0d4f2f;
    --green-focus-ring: rgba(22, 201, 120, 0.45);
}

/* =====================================
   Navbar
===================================== */
.navbar-brand span {
    color: #1f9d55;
    font-weight: 700;
}

.navbar-logo img {
    height: 40px;
    display: block;
}

.navbar-logo { 
    display:inline-block; 
    line-height:0; 
}

.navbar-nav .nav-link {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    transition: color 0.2s ease;
}

.navbar.sticky-top {
    min-height: 4.5rem;
}

.navbar.bg-body-tertiary .navbar-toggler {
    border-color: rgba(22, 201, 120, 0.28);
    border-radius: 0.75rem;
}

.navbar.bg-body-tertiary .navbar-toggler:focus-visible {
    box-shadow: 0 0 0 0.2rem rgba(22, 201, 120, 0.3);
}

.navbar.bg-body-tertiary .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(4,%2038,%2022,%200.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}


/* =====================================
   Hero Section
===================================== */
.hero-section {
    padding: 6rem 0 4rem;
}

.hero-image {
    max-width: 480px;
    width: 100%;
    border-radius: 1.75rem;
    box-shadow: 0 1.5rem 3rem rgba(31, 157, 85, 0.2);
}

/* =====================================
   Feature Blocks
===================================== */
.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(31, 157, 85, 0.15);
    color: #1f9d55;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.section-header {
    max-width: 640px;
}

#features .feature-icon {
    display: flex;
    margin-left: auto;
    margin-right: auto;
}

#features h5 {
    text-align: center;
}

#why h5 {
    text-align: center;
}

#why {
    background: linear-gradient(180deg, #ffffff 0%, #f6f8f8 100%);
    padding: 4.5rem 0;
}

/* =====================================
   Cards & Pricing
===================================== */
.pricing-card {
    border-radius: 1.25rem;
    border: 1px solid rgba(31, 157, 85, 0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 1.5rem 3rem rgba(31, 157, 85, 0.15);
}

.pricing-card ul {
    text-align: left;
    padding-left: 1.25rem;
}

.testimonial-card {
    border-radius: 1rem;
    border: 0;
    box-shadow: 0 1.5rem 3rem rgba(31, 157, 85, 0.1);
}

/* =====================================
   Footer
===================================== */
footer a {
    color: inherit;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* =====================================
   Dark Theme Overrides
===================================== */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --bs-body-color: #dff7ec;
        --bs-body-color-rgb: 223, 247, 236;
        --bs-secondary-color: rgba(223, 247, 236, 0.82);
        --bs-secondary-color-rgb: 223, 247, 236;
        --bs-body-bg: #0b1010;
        --bs-body-bg-rgb: 11, 16, 16;
        --bs-secondary-bg: #131a1b;
        --bs-secondary-bg-rgb: 19, 26, 27;
        --bs-tertiary-bg: #101718;
        --bs-tertiary-bg-rgb: 16, 23, 24;
        --bs-border-color: rgba(77, 255, 187, 0.22);
        --bs-border-color-translucent: rgba(77, 255, 187, 0.14);
        --bs-link-color: rgba(223, 247, 236, 0.92);
        --bs-link-hover-color: rgba(223, 247, 236, 1);
        --bs-navbar-color: rgba(223, 247, 236, 0.82);
        --bs-navbar-hover-color: rgba(223, 247, 236, 0.95);
        --bs-navbar-active-color: rgba(223, 247, 236, 1);
        --bs-navbar-brand-color: rgba(248, 255, 252, 0.98);
        --green-primary-start: #4dffbb;
        --green-primary-end: #1bd47e;
        --green-primary-text: #022015;
        --green-primary-glow: rgba(77, 255, 187, 0.36);
        --green-primary-glow-strong: rgba(77, 255, 187, 0.52);
        --green-secondary-bg: rgba(77, 255, 187, 0.18);
        --green-secondary-border: rgba(77, 255, 187, 0.52);
        --green-secondary-hover-bg: rgba(77, 255, 187, 0.26);
        --green-secondary-text: #022015;
        --green-focus-ring: rgba(77, 255, 187, 0.65);
    }

    .navbar.bg-body-tertiary .navbar-toggler {
        border-color: rgba(77, 255, 187, 0.35);
        background-color: rgba(77, 255, 187, 0.08);
    }

    .navbar.bg-body-tertiary .navbar-toggler:focus-visible {
        box-shadow: 0 0 0 0.2rem rgba(77, 255, 187, 0.4);
    }

    .navbar.bg-body-tertiary .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(77,%20255,%20187,%200.92)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    body {
        background-color: var(--bs-body-bg);
        color: var(--bs-body-color);
    }

    .bg-body-secondary,
    .navbar.bg-body-secondary {
        background-color: rgba(var(--bs-secondary-bg-rgb), 1) !important;
    }

    .bg-body-tertiary,
    .navbar.bg-body-tertiary,
    footer.bg-body-tertiary {
        background-color: rgba(var(--bs-tertiary-bg-rgb), 1) !important;
    }

    #why {
        background: linear-gradient(180deg, rgba(20, 30, 31, 0.92) 0%, rgba(14, 22, 23, 1) 100%);
        padding: 4.5rem 0;
    }

    .bg-body,
    .pricing-card.bg-body,
    .testimonial-card.bg-body {
        background-color: rgba(26, 34, 35, 0.92) !important;
    }

    .pricing-card {
        background-color: rgba(22, 30, 31, 0.94);
        border-color: rgba(77, 255, 187, 0.18);
        box-shadow: 0 1.25rem 3rem rgba(6, 18, 14, 0.45);
    }

    .pricing-card:hover {
        box-shadow: 0 1.5rem 3.5rem rgba(18, 42, 33, 0.55);
    }

    .testimonial-card {
        background-color: rgba(24, 32, 33, 0.94);
        box-shadow: 0 1.25rem 2.5rem rgba(5, 16, 12, 0.4);
    }

    .btn-primary {
        box-shadow: none;
    }

    .btn-primary:hover,
    .btn-primary:focus-visible {
        filter: brightness(1.04);
    }

    .btn-secondary {
        color: rgba(223, 247, 236, 0.9);
        background-color: rgba(77, 255, 187, 0.12);
        border-color: rgba(77, 255, 187, 0.35);
        box-shadow: none;
    }

    .btn-secondary:hover,
    .btn-secondary:focus-visible {
        background-color: rgba(77, 255, 187, 0.2);
        border-color: rgba(77, 255, 187, 0.45);
        color: var(--green-primary-text);
    }

    .btn-secondary:active {
        filter: brightness(0.95);
    }

    .navbar-nav .nav-link {
        color: rgba(223, 247, 236, 0.9) !important;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link:focus {
        color: rgba(223, 247, 236, 0.98) !important;
    }

    .navbar-nav .nav-link.active {
        color: rgba(223, 247, 236, 1) !important;
    }

    a {
        color: var(--bs-link-color);
    }

    a:hover,
    a:focus {
        color: var(--bs-link-hover-color);
    }

    .text-secondary {
        color: var(--bs-secondary-color) !important;
    }

    .border,
    .border-top,
    .border-bottom,
    .border-start,
    .border-end {
        border-color: var(--bs-border-color) !important;
    }

    footer {
        background-color: rgba(var(--bs-secondary-bg-rgb), 1) !important;
        color: var(--bs-secondary-color);
    }

    footer .text-secondary {
        color: var(--bs-secondary-color) !important;
    }
}

/* =====================================
   Buttons
===================================== */
.btn-primary,
.btn-secondary {
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.2s ease, filter 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--green-primary-start), var(--green-primary-end));
    color: var(--green-primary-text);
    border: none;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    filter: brightness(1.05);
    transform: translateY(-2px);
    color: var(--green-primary-text);
}

.btn-primary:focus-visible {
    outline: 2px solid var(--green-focus-ring);
    outline-offset: 2px;
}

.btn-primary:active {
    filter: brightness(0.92);
    transform: scale(0.97);
}

.btn-secondary {
    border: 1px solid var(--green-secondary-border);
    background: var(--green-secondary-bg);
    color: var(--green-secondary-text);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
    background: linear-gradient(135deg, var(--green-primary-start), var(--green-primary-end));
    color: var(--green-primary-text);
    border-color: transparent;
    transform: translateY(-2px);
}

.btn-secondary:focus-visible {
    outline: 2px solid var(--green-focus-ring);
    outline-offset: 2px;
}

.btn-secondary:active {
    background: var(--green-secondary-hover-bg);
    transform: scale(0.97);
    filter: brightness(0.92);
}

/* =====================================
   Interaction Helpers
===================================== */
@media (hover: none) {
    .btn-primary:active,
    .btn-secondary:active {
        transform: scale(0.95);
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 4rem 0 3rem;
    }

    #why {
        padding: 3.5rem 0;
    }
}