/* =========================================================
   ChinaUSDDP — Design System
   ========================================================= */

:root {
    /* Brand Colors */
    --color-primary: #0a4d8c;        /* Ocean Blue */
    --color-primary-dark: #073d6f;
    --color-primary-light: #1e6ab5;
    --color-accent: #f59e0b;         /* CTA Gold */
    --color-accent-dark: #d97706;
    --color-success: #16a34a;
    --color-danger: #dc2626;

    /* Neutrals */
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-text-muted: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-bg-dark: #0f172a;
    --color-border: #e5e7eb;
    --color-border-dark: #d1d5db;

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

    /* Layout */
    --container-max: 1200px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;

    /* Shadow */
    --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);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-display: 'Inter', sans-serif;
}

/* =========================================================
   Reset & Base
   ========================================================= */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--space-sm); }

/* =========================================================
   Utilities
   ========================================================= */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    width: 100%;
}

.section {
    padding: var(--space-3xl) 0;
}

.section-sm { padding: var(--space-2xl) 0; }

.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: #fff; }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }
.section-primary { background: var(--color-primary); color: #fff; }
.section-primary h1, .section-primary h2, .section-primary h3 { color: #fff; }

.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }
.lead { font-size: 1.25rem; color: var(--color-text-light); line-height: 1.6; }

.eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-xs);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.section-header h2 { margin-bottom: var(--space-sm); }

/* =========================================================
   Buttons
   ========================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.2;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-white:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary-dark);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-outline-white:hover {
    background: #fff;
    color: var(--color-primary);
}

.btn-lg {
    padding: 1.125rem 2.25rem;
    font-size: 1.125rem;
}

.btn-block { display: flex; width: 100%; }

/* =========================================================
   Header & Navigation
   ========================================================= */

.top-bar {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.9);
    font-size: 0.875rem;
    padding: 0.5rem 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.top-bar a { color: rgba(255,255,255,0.9); }
.top-bar a:hover { color: #fff; }

.top-bar-contacts {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.site-header {
    background: #fff;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
}

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.logo-tagline {
    font-size: 0.7rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.25rem;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-md);
    align-items: center;
}

.main-nav a {
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 0;
    font-size: 0.95rem;
}

.main-nav a:hover { color: var(--color-primary); }
.main-nav a.active { color: var(--color-primary); }

.main-nav .btn { padding: 0.625rem 1.25rem; }

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--color-text);
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.85) 0%, rgba(10,77,140,0.75) 50%, rgba(30,106,181,0.6) 100%),
        url('https://images.unsplash.com/photo-1494412519320-aa613dfb7738?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
    background-color: #073d6f;
    color: #fff;
    padding: var(--space-3xl) 0;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-image: radial-gradient(circle at top right, rgba(255,255,255,0.1) 0%, transparent 60%);
    pointer-events: none;
}

/* Floating decorative shapes in hero */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 60' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,40 C320,10 720,50 1440,20 L1440,60 L0,60 Z'/%3E%3C/svg%3E") center bottom / 100% 60px no-repeat;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: #fff;
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.hero .lead {
    color: rgba(255,255,255,0.9);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.hero-stat .stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.hero-stat .stat-label {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.8);
    margin-top: 0.5rem;
}

/* =========================================================
   Two Pillars / Cards
   ========================================================= */

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.pillar-card {
    background: #fff;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-primary);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.pillar-card.featured { border-top-color: var(--color-accent); }

.pillar-icon {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-md);
}

.pillar-card.featured .pillar-icon { background: var(--color-accent); }

.pillar-card h3 {
    margin-bottom: var(--space-sm);
}

.pillar-features {
    list-style: none;
    margin: var(--space-md) 0;
    flex-grow: 1;
}

.pillar-features li {
    padding: 0.5rem 0;
    padding-left: 1.75rem;
    position: relative;
    color: var(--color-text-light);
}

.pillar-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

/* =========================================================
   Feature Grid (Why Us, Services, etc.)
   ========================================================= */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: #fff;
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.feature-card h4 {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin: 0;
}

/* =========================================================
   Product Cards (Anti-Dumping Specialties)
   ========================================================= */

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.product-card {
    background: linear-gradient(135deg, #fff 0%, #f9fafb 100%);
    padding: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.product-banner {
    background: var(--color-primary);
    color: #fff;
    padding: var(--space-lg);
    text-align: center;
}

.product-banner.solar { background: linear-gradient(135deg, #f59e0b, #d97706); }
.product-banner.aluminum { background: linear-gradient(135deg, #6b7280, #4b5563); }
.product-banner.tires { background: linear-gradient(135deg, #1f2937, #0f172a); }

.product-banner h3 { color: #fff; margin-bottom: 0.25rem; }
.product-banner-icon { font-size: 2.5rem; margin-bottom: 0.5rem; }

.product-body {
    padding: var(--space-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--space-sm);
}

.product-tag {
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.product-body p {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    flex-grow: 1;
}

.product-body .btn {
    align-self: flex-start;
}

/* =========================================================
   Process Steps
   ========================================================= */

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    counter-reset: step;
}

.process-step {
    text-align: center;
    position: relative;
    padding: var(--space-md);
}

.process-step-number {
    counter-increment: step;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.process-step-number::after {
    content: counter(step);
}

.process-step h4 {
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.process-step p {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin: 0;
}

/* =========================================================
   Routes Table
   ========================================================= */

.routes-table {
    width: 100%;
    background: #fff;
    border-collapse: collapse;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.routes-table th,
.routes-table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.routes-table th {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.routes-table tr:last-child td { border-bottom: none; }
.routes-table tr:hover { background: var(--color-bg-alt); }

.route-transit {
    font-weight: 600;
    color: var(--color-primary);
}

/* =========================================================
   Testimonial / Case Cards
   ========================================================= */

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.case-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.case-category {
    background: var(--color-primary);
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.case-result {
    background: var(--color-success);
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.case-card h4 { margin-bottom: 0.5rem; }
.case-card p { color: var(--color-text-light); font-size: 0.95rem; margin: 0; }

.case-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

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

.case-stat-num {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.case-stat-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================================
   CTA Section
   ========================================================= */

.cta-section {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.92) 0%, rgba(10,77,140,0.85) 100%),
        url('https://images.unsplash.com/photo-1493946740644-2d8a1f1a6aff?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
    background-color: var(--color-primary-dark);
    color: #fff;
    padding: var(--space-2xl) 0;
    text-align: center;
    position: relative;
}

.cta-section h2 { color: #fff; margin-bottom: var(--space-sm); }
.cta-section p { color: rgba(255,255,255,0.9); font-size: 1.125rem; margin-bottom: var(--space-lg); }

.cta-section .btn-group {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* =========================================================
   Forms
   ========================================================= */

.form-card {
    background: #fff;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-size: 0.95rem;
}

.form-label .required {
    color: var(--color-danger);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
    background: #fff;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10, 77, 140, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.form-section-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin: var(--space-lg) 0 var(--space-sm);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.form-success {
    display: none;
    padding: var(--space-md);
    background: #d1fae5;
    color: #065f46;
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
}

.form-success.show { display: block; }

/* =========================================================
   FAQ Accordion
   ========================================================= */

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: var(--space-md);
    background: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
}

.faq-question:hover { background: var(--color-bg-alt); }

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-primary);
    transition: transform 0.2s;
}

.faq-item.open .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 var(--space-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s, padding 0.3s;
    color: var(--color-text-light);
}

.faq-item.open .faq-answer {
    padding: 0 var(--space-md) var(--space-md);
    max-height: 500px;
}

/* =========================================================
   Sub-Hero / Page Header
   ========================================================= */

.page-header {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: #fff;
    padding: var(--space-2xl) 0;
    position: relative;
    overflow: hidden;
}

.page-header h1 { color: #fff; position: relative; z-index: 2; }
.page-header .lead { color: rgba(255,255,255,0.9); position: relative; z-index: 2; }
.page-header .breadcrumb { position: relative; z-index: 2; }
.page-header .container > div,
.page-header .container > h1,
.page-header .container > p { position: relative; z-index: 2; }

/* Background image variants for page headers */
.page-header.bg-port {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1578575437130-527eed3abbec?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-container {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1568430462989-44163eb1752f?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-cargo-ship {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1605276374104-dee2a0ed3cd6?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-warehouse {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1553413077-190dd305871c?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-shenzhen {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1545558014-8692077e9b5c?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-truck {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1601584115197-04ecc0da31d7?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-office {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1497366216548-37526070297c?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-lighthouse {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.88) 0%, rgba(10,77,140,0.78) 100%),
        url('https://images.unsplash.com/photo-1473496169904-658ba7c44d8a?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

/* Anti-dumping themed headers */
.page-header.bg-solar {
    background:
        linear-gradient(135deg, rgba(217,119,6,0.88) 0%, rgba(245,158,11,0.78) 100%),
        url('https://images.unsplash.com/photo-1509391366360-2e959784a276?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-aluminum {
    background:
        linear-gradient(135deg, rgba(75,85,99,0.9) 0%, rgba(107,114,128,0.85) 100%),
        url('https://images.unsplash.com/photo-1620283085439-39620a1e21c4?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

.page-header.bg-tires {
    background:
        linear-gradient(135deg, rgba(15,23,42,0.9) 0%, rgba(31,41,55,0.85) 100%),
        url('https://images.unsplash.com/photo-1626668893632-6f3a4466d22f?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
}

/* Wave divider below page header */
.page-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 40px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 40' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,30 C320,5 720,40 1440,15 L1440,40 L0,40 Z'/%3E%3C/svg%3E") center bottom / 100% 40px no-repeat;
    pointer-events: none;
    z-index: 1;
}

/* Section with bg image (for section-alt variants) */
.section-bg-pattern {
    position: relative;
    background: var(--color-bg-alt);
    overflow: hidden;
}

.section-bg-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cg fill='%230a4d8c' fill-opacity='0.04'%3E%3Cpath d='M40 0L80 40L40 80L0 40Z'/%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

.section-bg-pattern .container {
    position: relative;
    z-index: 1;
}

/* CTA section with bg image */
.cta-section-bg {
    background:
        linear-gradient(135deg, rgba(7,61,111,0.92) 0%, rgba(10,77,140,0.85) 100%),
        url('https://images.unsplash.com/photo-1493946740644-2d8a1f1a6aff?w=1920&q=80&auto=format&fit=crop') center center / cover no-repeat;
    background-color: var(--color-primary-dark);
    color: #fff;
    padding: var(--space-2xl) 0;
    text-align: center;
    position: relative;
}

.cta-section-bg h2 { color: #fff; margin-bottom: var(--space-sm); }
.cta-section-bg p { color: rgba(255,255,255,0.9); font-size: 1.125rem; margin-bottom: var(--space-lg); }

/* Route map section */
.route-map {
    position: relative;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    background: linear-gradient(135deg, #0a4d8c 0%, #073d6f 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.route-map svg {
    width: 100%;
    height: auto;
    display: block;
}

.route-map-legend {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.route-legend-item {
    color: rgba(255,255,255,0.9);
    font-size: 0.875rem;
}

.route-legend-item strong {
    color: #f59e0b;
    display: block;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

/* Animated route line */
@keyframes dashFlow {
    to { stroke-dashoffset: -100; }
}

.route-line {
    stroke-dasharray: 8, 4;
    animation: dashFlow 4s linear infinite;
}

@keyframes shipMove {
    0% { offset-distance: 0%; }
    100% { offset-distance: 100%; }
}

.breadcrumb {
    color: rgba(255,255,255,0.7);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.breadcrumb a {
    color: rgba(255,255,255,0.9);
}

.breadcrumb a:hover { color: #fff; }

/* =========================================================
   Two-Column Content
   ========================================================= */

.two-col {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.sidebar-card {
    background: #fff;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-accent);
    position: sticky;
    top: 90px;
}

.sidebar-card h3 { margin-bottom: var(--space-sm); }

/* =========================================================
   Info / Alert Boxes
   ========================================================= */

.info-box {
    background: #eff6ff;
    border-left: 4px solid var(--color-primary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin: var(--space-md) 0;
}

.info-box.warning {
    background: #fef3c7;
    border-left-color: var(--color-accent);
}

.info-box.danger {
    background: #fee2e2;
    border-left-color: var(--color-danger);
}

.info-box h4 { margin-bottom: 0.5rem; }
.info-box p { margin: 0; color: var(--color-text); }

/* =========================================================
   Floating WhatsApp Button
   ========================================================= */

.float-whatsapp {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #25D366;
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: var(--shadow-lg);
    z-index: 99;
    transition: transform 0.2s;
    text-decoration: none;
}

.float-whatsapp:hover {
    transform: scale(1.1);
    color: #fff;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: var(--space-2xl) 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-brand h4 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
}

.footer-col h5 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-col ul {
    list-style: none;
}

.footer-col li { margin-bottom: 0.5rem; }

.footer-col a {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}

.footer-col a:hover { color: #fff; }

.footer-contact-item {
    display: flex;
    align-items: start;
    gap: 0.5rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-md);
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.875rem;
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 900px) {
    .mobile-nav-toggle { display: block; }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s;
        padding: var(--space-xl) var(--space-md);
        z-index: 200;
    }

    .main-nav.open { right: 0; }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-sm);
    }

    .main-nav a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--color-border);
    }

    .two-col {
        grid-template-columns: 1fr;
    }

    .sidebar-card { position: static; }

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

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

    .top-bar {
        font-size: 0.75rem;
    }
}

@media (max-width: 600px) {
    .section { padding: var(--space-2xl) 0; }
    .section-sm { padding: var(--space-xl) 0; }
    .hero { padding: var(--space-2xl) 0; }
    .hero-cta .btn { width: 100%; }
    .cta-section .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; }
    .top-bar-contacts { display: none; }
}

/* =========================================================
   Placeholder Highlight (for development)
   ========================================================= */

[data-placeholder] {
    background: rgba(245, 158, 11, 0.15);
    padding: 2px 6px;
    border-radius: 3px;
    border-bottom: 1px dashed var(--color-accent);
}