/* ===================================
   粤流利 - 推广网站样式
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Matching App Gradient */
    --primary-start: #a78bfa;
    --primary-mid: #818cf8;
    --primary-end: #67e8f9;
    --primary-gradient: linear-gradient(135deg, var(--primary-start), var(--primary-mid), var(--primary-end));

    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;

    /* Background Colors */
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #111827;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 60px rgba(167, 139, 250, 0.4);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Font */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

.nav-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.nav-download-btn {
    padding: 8px 20px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links a:not(.nav-download-btn) {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0.08;
    z-index: -1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content {
    text-align: left;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(103, 232, 249, 0.15));
    color: var(--primary-mid);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.hero-note {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(17, 24, 39, 0.04);
    color: var(--text-primary);
    border: 1px solid rgba(17, 24, 39, 0.08);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    border-color: rgba(129, 140, 248, 0.35);
    box-shadow: var(--shadow-md);
}

.btn-light {
    background: var(--text-white);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.125rem;
}

/* Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #2d2d2d, #1a1a1a);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.app-preview {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.app-preview-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    border-radius: 30px;
}

.phone-glow {
    position: absolute;
    inset: -40px;
    background: var(--primary-gradient);
    opacity: 0.3;
    filter: blur(60px);
    z-index: 0;
    border-radius: 50%;
}

/* Hero Wave */
.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 80px;
}

/* ===================================
   Features Section
   =================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   Screenshots Section
   =================================== */
.screenshots {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.screenshots-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.screenshot-wrapper {
    text-align: center;
}

.screenshot-device {
    margin-bottom: var(--spacing-md);
}

.screenshot-frame {
    width: 220px;
    height: 450px;
    background: linear-gradient(145deg, #2d2d2d, #1a1a1a);
    border-radius: 32px;
    padding: 10px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.screenshot-notch {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: #1a1a1a;
    border-radius: 12px;
    z-index: 10;
}

.screenshot-screen {
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-placeholder {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    font-weight: 500;
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.screenshot-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===================================
   Download Section
   =================================== */
.download {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    z-index: -1;
}

.download-content {
    text-align: center;
    color: var(--text-white);
}

.download-icon {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-xl);
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-xl);
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.download-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

.footer-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ===================================
   SEO Sections
   =================================== */
.keyword-section,
.content-section,
.faq-section {
    padding: var(--spacing-3xl) 0;
}

.keyword-section {
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.06), rgba(255, 255, 255, 0));
}

.keyword-grid,
.topic-links,
.faq-list {
    display: grid;
    gap: var(--spacing-md);
}

.keyword-grid,
.topic-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.keyword-card,
.topic-link-card,
.faq-item,
.article-section,
.article-cta {
    background: var(--bg-white);
    border: 1px solid rgba(17, 24, 39, 0.06);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.keyword-card,
.topic-link-card,
.faq-item {
    padding: var(--spacing-lg);
}

.keyword-card h3,
.topic-link-card h3,
.faq-item h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.keyword-card p,
.topic-link-card p,
.faq-item p {
    color: var(--text-secondary);
}

.keyword-card a,
.topic-link-card {
    color: var(--primary-mid);
    font-weight: 600;
}

.keyword-card a {
    display: inline-block;
    margin-top: var(--spacing-sm);
}

.topic-link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.article-layout {
    padding-top: 64px;
}

.page-shell {
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.07), rgba(255, 255, 255, 0) 30%);
}

.page-hero {
    padding: calc(var(--spacing-3xl) + var(--spacing-xl)) 0 var(--spacing-xl);
}

.breadcrumbs {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    font-size: 0.95rem;
}

.breadcrumbs a {
    color: var(--primary-mid);
}

.page-hero h1 {
    font-size: 3rem;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
}

.page-summary {
    max-width: 780px;
    color: var(--text-secondary);
    font-size: 1.15rem;
}

.guide-hero {
    padding: calc(var(--spacing-3xl) + var(--spacing-xl)) 0 var(--spacing-2xl);
}

.guide-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: var(--spacing-2xl);
    align-items: center;
}

.guide-kicker {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.16), rgba(103, 232, 249, 0.18));
    color: var(--primary-mid);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.guide-hero h1 {
    font-size: 3.2rem;
    line-height: 1.08;
    margin-bottom: var(--spacing-md);
}

.guide-summary {
    max-width: 720px;
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: var(--spacing-lg);
}

.guide-points {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: var(--spacing-lg);
}

.guide-points span {
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(17, 24, 39, 0.06);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.guide-hero-copy .inline-links {
    margin-top: 0;
}

.guide-panel {
    position: relative;
    padding: var(--spacing-xl);
    border-radius: 32px;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(247, 249, 252, 0.94));
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.guide-panel::before {
    content: "";
    position: absolute;
    inset: auto -20% -35% 20%;
    height: 220px;
    background: radial-gradient(circle, rgba(103, 232, 249, 0.22), rgba(129, 140, 248, 0));
    pointer-events: none;
}

.guide-panel .phone-frame {
    margin: 0 auto;
}

.guide-panel-note {
    margin-top: var(--spacing-lg);
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    background: rgba(17, 24, 39, 0.04);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.guide-strip {
    padding-bottom: var(--spacing-2xl);
}

.guide-strip-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-md);
}

.guide-strip-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(17, 24, 39, 0.06);
    box-shadow: var(--shadow-sm);
}

.guide-strip-card h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.guide-strip-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.guide-steps-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-lg);
}

.guide-step-card {
    position: relative;
    padding: var(--spacing-xl);
    border-radius: 28px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(250, 250, 255, 0.97));
    border: 1px solid rgba(17, 24, 39, 0.06);
    box-shadow: var(--shadow-sm);
}

.guide-step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: var(--primary-gradient);
    color: var(--text-white);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.guide-step-card h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

.guide-step-card p {
    color: var(--text-secondary);
}

.guide-step-card ul {
    margin-top: var(--spacing-md);
    padding-left: 1.1rem;
    color: var(--text-secondary);
}

.guide-step-card li + li {
    margin-top: 8px;
}

.guide-screens {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.guide-screens-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-lg);
}

.guide-screen-card {
    padding: var(--spacing-lg);
    border-radius: 28px;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.guide-screen-card .screenshot-frame {
    margin: 0 auto var(--spacing-md);
}

.guide-screen-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.guide-screen-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.guide-band {
    padding: var(--spacing-3xl) 0;
}

.guide-band-inner {
    padding: var(--spacing-2xl);
    border-radius: 32px;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.14), rgba(103, 232, 249, 0.18));
    box-shadow: var(--shadow-lg);
}

.guide-band-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.guide-band h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.guide-band p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.guide-checklist {
    display: grid;
    gap: 12px;
}

.guide-checklist div {
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(17, 24, 39, 0.05);
    color: var(--text-primary);
    font-weight: 500;
}

.article-section {
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-section h2,
.article-cta h2 {
    font-size: 1.6rem;
    margin-bottom: var(--spacing-sm);
}

.article-section p,
.article-cta p {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.article-cta {
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.1), rgba(103, 232, 249, 0.12));
}

.inline-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        order: -1;
        margin-bottom: var(--spacing-lg);
    }

    .phone-frame {
        width: 240px;
        height: 500px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }

    .nav-links a:not(.nav-download-btn) {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .feature-card {
        padding: var(--spacing-lg);
    }

    .keyword-grid,
    .topic-links {
        grid-template-columns: 1fr;
    }

    .page-hero h1 {
        font-size: 2.2rem;
    }

    .page-summary {
        font-size: 1rem;
    }

    .guide-hero-grid,
    .guide-band-grid,
    .guide-steps-grid,
    .guide-screens-grid,
    .guide-strip-grid {
        grid-template-columns: 1fr;
    }

    .guide-hero h1 {
        font-size: 2.4rem;
    }

    .guide-panel {
        padding: var(--spacing-lg);
    }

    .article-section,
    .article-cta,
    .keyword-card,
    .topic-link-card,
    .faq-item {
        padding: var(--spacing-lg);
    }

    .screenshots-container {
        gap: var(--spacing-lg);
    }

    .screenshot-frame {
        width: 180px;
        height: 370px;
    }

    .download-title {
        font-size: 1.75rem;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
}

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

    .phone-frame {
        width: 200px;
        height: 420px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.9375rem;
    }

    .btn-large {
        padding: 14px 28px;
        font-size: 1rem;
    }

    .inline-links {
        flex-direction: column;
    }
}