/* ========================================
   百川跨境 - Premium Corporate Stylesheet
   ======================================== */

/* ---- CSS Variables ---- */
:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f3f6fb;
    --color-primary: #0A1628;
    --color-primary-light: #152240;
    --color-accent: #0EA5A9;
    --color-accent-dark: #0B8A8E;
    --color-accent-light: #E6F7F8;
    --color-gold: #C8A45C;
    --color-gold-light: #FBF6ED;
    --color-text: #1E293B;
    --color-text-muted: #64748B;
    --color-text-light: #94A3B8;
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;
    --color-white: #ffffff;
    --color-card-bg: #ffffff;
    --color-card-shadow: 0 1px 3px rgba(10, 22, 40, 0.06), 0 4px 16px rgba(10, 22, 40, 0.04);
    --color-card-shadow-hover: 0 2px 6px rgba(10, 22, 40, 0.08), 0 12px 36px rgba(10, 22, 40, 0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --container-max: 1240px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ---- Container ---- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 28px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-family: var(--font-sans);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(10, 22, 40, 0.25);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.btn-accent::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-accent:hover::after {
    transform: translateX(100%);
}

.btn-accent:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(14, 165, 169, 0.35);
}

.btn-accent:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

.btn-lg {
    padding: 15px 36px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ---- Header / Nav ---- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-smooth);
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: 0 1px 3px rgba(10, 22, 40, 0.06);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: 0 2px 8px rgba(10, 22, 40, 0.08);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-img {
    height: 44px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-link {
    font-size: 14.5px;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    letter-spacing: 0.01em;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-border-light);
}

.nav-cta {
    flex-shrink: 0;
}

/* ---- Mobile Menu ---- */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Hero Section ---- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1C0A02 0%, #3D1A08 40%, #1C0A02 100%);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.2;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: #F59E0B;
    top: -20%;
    right: -10%;
    animation: orbFloat1 12s ease-in-out infinite;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: #D97706;
    bottom: -20%;
    left: -5%;
    animation: orbFloat2 15s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(-40px, 30px); }
    66% { transform: translate(30px, -20px); }
}

@keyframes orbFloat2 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(40px, -30px); }
    66% { transform: translate(-30px, 20px); }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 840px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.85);
    font-size: 13.5px;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 50px;
    margin-bottom: 32px;
    letter-spacing: 0.02em;
}

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-white);
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.hero-title-highlight {
    background: linear-gradient(135deg, var(--color-accent) 0%, #60E6CB 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.65);
    max-width: 580px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.hero-stat-number {
    display: block;
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-stat-plus,
.hero-stat-unit {
    color: var(--color-accent);
}

.hero-stat-label {
    display: block;
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 4px;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.12);
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
    cursor: pointer;
    animation: scrollHint 2s ease-in-out infinite;
    transition: color var(--transition-fast);
    border: none;
    background: none;
    font-family: var(--font-sans);
}

.hero-scroll:hover {
    color: rgba(255, 255, 255, 0.7);
}

@keyframes scrollHint {
    0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* ---- Section Common ---- */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.section-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-muted);
}

/* ---- About Section ---- */
.about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 64px;
}

.about-card {
    text-align: center;
    padding: 40px 32px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-smooth);
}

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

.about-card-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-accent);
}

.about-card-icon svg {
    width: 100%;
    height: 100%;
}

.about-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.about-card p {
    font-size: 14.5px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.about-values {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    padding: 40px 0;
    border-top: 1px solid var(--color-border-light);
}

.value-item {
    text-align: center;
}

.value-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.value-suffix {
    font-size: 24px;
    color: var(--color-accent);
}

.value-label {
    display: block;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.value-divider {
    width: 1px;
    height: 48px;
    background: var(--color-border);
}

/* ---- Services Section ---- */
.services {
    background: var(--color-bg-alt);
}

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

.service-card {
    position: relative;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 36px 28px 28px;
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #60E6CB);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

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

.service-card:hover {
    border-color: transparent;
    box-shadow: var(--color-card-shadow-hover);
    transform: translateY(-6px);
}

.service-card-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 50px;
    letter-spacing: 0.05em;
}

.service-card:nth-child(1) .service-card-badge {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.service-card:nth-child(2) .service-card-badge {
    background: #FEF3C7;
    color: #D97706;
}

.service-card-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.service-card-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
    flex: 1;
}

.service-features li {
    font-size: 13.5px;
    color: var(--color-text);
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
}

.service-features li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap var(--transition-fast);
    margin-top: auto;
}

.service-link:hover {
    gap: 10px;
}

/* ---- Advantages Section ---- */
.advantages {
    background: var(--color-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.advantage-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-smooth);
}

.advantage-item:hover {
    border-color: transparent;
    box-shadow: var(--color-card-shadow-hover);
    transform: translateY(-2px);
}

.advantage-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.3;
    transition: opacity var(--transition-fast);
}

.advantage-item:hover .advantage-number {
    opacity: 1;
}

.advantage-content h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.advantage-content p {
    font-size: 14.5px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ---- Process Section ---- */
.process {
    background: var(--color-bg-alt);
}

.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    position: relative;
}

.process-step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-accent);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px rgba(14, 165, 169, 0.3);
    flex-shrink: 0;
}

.process-step-content h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.process-step-content p {
    font-size: 13.5px;
    color: var(--color-text-muted);
    line-height: 1.6;
    max-width: 180px;
    margin: 0 auto;
}

.process-arrow {
    position: absolute;
    top: 18px;
    right: -12px;
    color: var(--color-border);
    z-index: 1;
}

.process-step:last-child .process-arrow {
    display: none;
}

/* ---- Contact Section ---- */
.contact {
    background: var(--color-bg);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: start;
}

.contact-info .section-header {
    text-align: left;
    margin-bottom: 24px;
}

.contact-intro {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.contact-detail svg {
    width: 22px;
    height: 22px;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-detail-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.contact-detail-value {
    font-size: 15px;
    color: var(--color-primary);
    font-weight: 500;
}

.contact-hours {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    padding: 14px 20px;
    border-radius: var(--radius-sm);
}

.contact-hours-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22C55E;
    animation: pulse 2s ease-in-out infinite;
}

/* ---- Contact Form ---- */
.contact-form {
    background: var(--color-card-bg);
    padding: 40px;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--color-card-shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.form-group:last-of-type {
    margin-bottom: 24px;
}

.form-group label {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 14.5px;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(14, 165, 169, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2364748B' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-note {
    font-size: 12.5px;
    color: var(--color-text-light);
    text-align: center;
    margin-top: 16px;
}

/* ---- Footer ---- */
.footer {
    background: linear-gradient(135deg, #1C0A02 0%, #3D1A08 40%, #1C0A02 100%);
    padding: 72px 0 32px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-main {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    padding: 6px 0;
    transition: color var(--transition-fast);
}

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

.footer-contact-item {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    padding: 6px 0;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.4);
    transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
    color: rgba(255, 255, 255, 0.7);
}

/* ---- Scroll Reveal ---- */
.reveal {
    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);
}

.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; }

/* ---- Toast ---- */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 16px 28px;
    border-radius: var(--radius-md);
    font-size: 14.5px;
    font-weight: 500;
    box-shadow: 0 8px 30px rgba(10, 22, 40, 0.25);
    z-index: 2000;
    transform: translateX(120%);
    transition: transform var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    transform: translateX(0);
}

.toast svg {
    width: 20px;
    height: 20px;
    color: #22C55E;
    flex-shrink: 0;
}

/* ---- Scroll to Top ---- */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-smooth);
    box-shadow: 0 4px 20px rgba(10, 22, 40, 0.3);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(10, 22, 40, 0.4);
}

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

    .footer-main {
        gap: 10px;
        margin-bottom: 32px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .process-steps {
        flex-wrap: wrap;
        gap: 32px;
    }

    .process-step {
        flex: 0 0 calc(50% - 16px);
    }

    .process-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    /* ---- Buttons (mobile shrink) ---- */
    .btn {
        font-size: 14px;
        padding: 10px 22px;
    }

    .btn-lg {
        padding: 12px 28px;
        font-size: 15px;
    }

    .nav-cta {
        font-size: 14px;
        padding: 10px 20px;
    }

    /* ---- Nav mobile ---- */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        height: 100dvh;
        flex-direction: column;
        background: var(--color-primary);
        padding: 100px 32px 40px;
        gap: 4px;
        transition: right var(--transition-smooth);
    }

    .nav.active {
        right: 0;
    }

    .nav-link {
        color: rgba(255, 255, 255, 0.7);
        font-size: 16px;
        padding: 12px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 0;
        width: 100%;
    }

    .nav-link:hover,
    .nav-link.active {
        color: var(--color-white) !important;
        background: transparent !important;
    }

    .menu-toggle {
        display: none !important;
    }

    .nav-cta {
        display: inline-flex;
    }

    /* ---- Header mobile shrink ---- */
    .header {
        padding: 10px 0;
    }

    .header.scrolled {
        padding: 8px 0;
    }

    .logo-img {
        height: 30px;
    }

    /* ---- Hero mobile ---- */
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 15px;
        max-width: 100%;
        margin-bottom: 32px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto 48px;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
        margin-bottom: 24px;
    }

    .hero-stats {
        gap: 20px;
    }

    .hero-stat-number {
        font-size: 28px;
    }

    .hero-stat-divider {
        height: 32px;
    }

    .hero-stat-label {
        font-size: 12px;
    }

    .hero-scroll {
        bottom: 20px;
    }

    /* ---- Sections mobile ---- */
    .section {
        padding: 64px 0;
    }

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

    .section-tag {
        font-size: 12px;
        padding: 5px 14px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-desc {
        font-size: 14.5px;
    }

    /* ---- About mobile ---- */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .about-card {
        padding: 28px 24px;
    }

    .about-card h3 {
        font-size: 16px;
    }

    .about-card p {
        font-size: 13.5px;
    }

    .about-values {
        gap: 20px;
        padding: 32px 0;
    }

    .value-number {
        font-size: 28px;
    }

    .value-suffix {
        font-size: 20px;
    }

    .value-label {
        font-size: 13px;
    }

    .value-divider {
        display: none;
    }

    /* ---- Services mobile ---- */
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .service-card {
        padding: 28px 22px 24px;
    }

    .service-card h3 {
        font-size: 16px;
    }

    .service-card p {
        font-size: 13.5px;
    }

    .service-features li {
        font-size: 13px;
    }

    /* ---- Advantages mobile ---- */
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .advantage-item {
        padding: 24px;
        gap: 18px;
    }

    .advantage-number {
        font-size: 24px;
    }

    .advantage-content h3 {
        font-size: 15px;
    }

    .advantage-content p {
        font-size: 13.5px;
    }

    /* ---- Process mobile ---- */
    .process-steps {
        flex-direction: column;
        gap: 20px;
    }

    .process-step {
        flex-direction: row;
        text-align: left;
        gap: 16px;
    }

    .process-step-number {
        width: 44px;
        height: 44px;
        font-size: 18px;
        margin-bottom: 0;
    }

    .process-step-content h3 {
        font-size: 15px;
    }

    .process-step-content p {
        font-size: 13px;
        max-width: none;
    }

    .process-arrow {
        display: none;
    }

    /* ---- Contact mobile ---- */
    .contact-wrapper {
        gap: 40px;
    }

    .contact-info .section-title {
        font-size: 26px;
    }

    .contact-intro {
        font-size: 14px;
        margin-bottom: 28px;
    }

    .contact-details {
        gap: 16px;
    }

    .contact-detail-label {
        font-size: 11px;
    }

    .contact-detail-value {
        font-size: 14px;
    }

    .contact-form {
        padding: 24px 18px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-group label {
        font-size: 13px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 14px;
        font-size: 14px;
    }

    /* ---- Footer mobile ---- */
    .footer {
        padding: 56px 0 28px;
    }

    .footer-main {
        gap: 8px;
        margin-bottom: 28px;
    }

    .footer-links h4 {
        font-size: 13px;
        margin-bottom: 14px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding-top: 24px;
        font-size: 12px;
    }

    /* ---- Scroll top mobile ---- */
    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .btn {
        font-size: 13px;
        padding: 9px 18px;
    }

    .btn-lg {
        padding: 10px 20px;
        font-size: 13px;
    }

    .nav-cta {
        font-size: 12px;
        padding: 8px 16px;
    }

    .hero-actions {
        max-width: 240px;
    }

    .logo-img {
        height: 26px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 27px;
    }

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

    .hero-actions {
        max-width: 260px;
    }

    .hero-stats {
        gap: 12px;
    }

    .hero-stat-number {
        font-size: 24px;
    }

    .hero-stat-divider {
        height: 26px;
    }

    .hero-scroll {
        bottom: 14px;
        font-size: 11px;
    }

    .section-title {
        font-size: 24px;
    }

    .service-card {
        padding: 24px 18px 20px;
    }

    .contact-form {
        padding: 20px 14px;
    }

    .contact-info .section-title {
        font-size: 23px;
    }

    .footer {
        padding: 48px 0 24px;
    }

    .footer-desc {
        font-size: 13px;
    }
}

/* ---- WeChat / Small Phone (≤375px) ---- */
@media (max-width: 375px) {
    .btn {
        font-size: 12px;
        padding: 8px 16px;
        gap: 6px;
    }

    .btn-lg {
        padding: 9px 18px;
        font-size: 13px;
    }

    .nav-cta {
        font-size: 12px;
        padding: 7px 14px;
    }

    .hero-actions {
        max-width: 220px;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 13px;
        margin-bottom: 24px;
    }

    .hero-badge {
        font-size: 11px;
        padding: 5px 14px;
    }

    .hero-stats {
        gap: 10px;
    }

    .hero-stat-number {
        font-size: 22px;
    }

    .hero-stat-divider {
        height: 22px;
        margin: 0 6px;
    }

    .hero-stat-label {
        font-size: 11px;
    }

    .section-title {
        font-size: 22px;
    }

    .section-desc {
        font-size: 13px;
    }

    .logo-img {
        height: 24px;
    }

    .header {
        padding: 8px 0;
    }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}