/* ==========================================================================
   东营优印 - 全站样式
   ========================================================================== */

:root {
    --primary: #2c6e49;
    --primary-light: #4da67a;
    --primary-dark: #1f5236;
    --secondary: #1a3a2b;
    --accent: #ff9e1b;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --radius: 16px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
    --nav-h: 68px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    color: var(--dark);
    line-height: 1.7;
    background: var(--light);
}

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

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

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.brand i {
    font-size: 1.7rem;
}

.brand em {
    font-style: normal;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-links a {
    padding: 8px 18px;
    border-radius: 999px;
    font-weight: 500;
    color: var(--dark);
    transition: all 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--primary);
    color: #fff;
}

.nav-toggle {
    display: none;
    border: none;
    background: none;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-h) + 60px) 0 80px;
    overflow: hidden;
    color: #fff;
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 158, 27, 0.18), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(77, 166, 122, 0.35), transparent 45%),
        linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--secondary) 100%);
}

.hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-logo {
    display: inline-block;
    background: #fff;
    border-radius: 22px;
    padding: 14px 36px;
    margin-bottom: 30px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.3), 0 0 0 6px rgba(255, 255, 255, 0.08);
    animation: logo-float 5s ease-in-out infinite;
}

.hero-logo img {
    height: 104px;
    width: auto;
}

@keyframes logo-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.hero-title span {
    color: var(--accent);
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin: 18px auto 28px;
    max-width: 640px;
    opacity: 0.92;
}

.hero-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 36px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(4px);
    font-size: 0.98rem;
}

.badge i {
    color: var(--accent);
}

.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 44px;
}

.btn {
    display: inline-block;
    padding: 14px 38px;
    border-radius: 999px;
    font-size: 1.05rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 24px rgba(255, 158, 27, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(255, 158, 27, 0.5);
}

.btn-ghost {
    border: 2px solid rgba(255, 255, 255, 0.6);
    color: #fff;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
}

.upgrade-banner {
    display: inline-block;
    max-width: 720px;
    margin: 0 auto;
    padding: 14px 28px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.22);
    font-size: 0.98rem;
}

.upgrade-banner i {
    color: var(--accent);
    margin-right: 8px;
}

/* ---------- 通用 Section ---------- */
.section {
    padding: 90px 0;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: clamp(1.7rem, 3.5vw, 2.3rem);
    color: var(--primary);
    margin-bottom: 14px;
}

.section-title i {
    color: var(--accent);
}

.section-title.light {
    color: #fff;
}

.section-sub {
    text-align: center;
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

/* ---------- 关于我们 ---------- */
.about {
    background: linear-gradient(180deg, #fff 0%, var(--light) 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
    margin-top: 44px;
}

.about-text p {
    font-size: 1.1rem;
    color: #414a52;
    margin-bottom: 18px;
}

.about-text .highlight {
    position: relative;
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    background: linear-gradient(90deg, rgba(44, 110, 73, 0.08), rgba(255, 158, 27, 0.08));
    border-left: 4px solid var(--accent);
    color: var(--primary-dark);
    font-weight: 600;
}

.about-features {
    display: grid;
    gap: 18px;
}

.feature-card {
    display: flex;
    align-items: center;
    gap: 18px;
    background: #fff;
    border-radius: var(--radius);
    padding: 22px 26px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 1.9rem;
    color: var(--primary);
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: rgba(44, 110, 73, 0.1);
}

.feature-card h3 {
    font-size: 1.15rem;
    color: var(--dark);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--gray);
}

/* ---------- 服务项目 ---------- */
.services {
    background:
        radial-gradient(circle at 90% 10%, rgba(44, 110, 73, 0.06), transparent 40%),
        var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 26px;
    margin-top: 50px;
}

.service-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 38px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    border-top: 4px solid transparent;
    transition: all 0.35s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    border-top-color: var(--accent);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 84px;
    height: 84px;
    margin: 0 auto 22px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    box-shadow: 0 10px 24px rgba(44, 110, 73, 0.35);
}

.service-icon i {
    font-size: 2.2rem;
    color: #fff;
}

.service-card h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--gray);
    font-size: 1rem;
}

/* ---------- 联系我们 ---------- */
.contact {
    background:
        radial-gradient(circle at 15% 85%, rgba(255, 158, 27, 0.15), transparent 45%),
        linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    text-align: center;
}

.contact-intro {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: 48px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 26px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-item {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    padding: 34px 24px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.14);
}

.contact-item i {
    font-size: 2.2rem;
    color: var(--accent);
    margin-bottom: 14px;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
}

.contact-item a {
    font-weight: 500;
    transition: color 0.2s;
}

.contact-item a:hover {
    color: var(--accent);
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.75);
    text-align: center;
    padding: 34px 24px;
    font-size: 0.95rem;
}

.footer .beian {
    margin-top: 10px;
}

.footer a {
    color: rgba(255, 255, 255, 0.75);
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.footer .divider {
    margin: 0 12px;
    opacity: 0.4;
}

/* ---------- 返回顶部 ---------- */
.back-top {
    position: fixed;
    right: 26px;
    bottom: 30px;
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 8px 24px rgba(44, 110, 73, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all 0.3s ease;
    z-index: 90;
}

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

.back-top:hover {
    background: var(--accent);
}

/* ---------- 滚动动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: var(--nav-h);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: #fff;
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
    }

    .nav-links.open {
        max-height: 300px;
    }

    .nav-links a {
        border-radius: 0;
        padding: 15px 28px;
        text-align: center;
    }

    .section {
        padding: 64px 0;
    }

    .hero-logo {
        padding: 10px 24px;
        margin-bottom: 22px;
    }

    .hero-logo img {
        height: 72px;
    }

    .footer .beian .divider {
        display: block;
        height: 8px;
        background: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-logo {
        animation: none;
    }
}