/* 基础样式 */
:root {
    --primary-color: #1a2a6c;
    --accent-color: #b21f1f;
    --text-dark: #333;
    --text-light: #fff;
}

body {
    margin: 0;
    font-family: 'Noto Sans SC', 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: #fff;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
nav {
    background: #fff;
    height: 70px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li { margin-left: 20px; }

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 10px;
    border-radius: 8px;
}

.nav-links a.active {
    color: var(--primary-color);
    background: rgba(26, 42, 108, 0.08);
}

/* 英雄页 */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), 
                url('assets/evercrest-hero.svg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content {
    max-width: 860px;
    padding: 0 20px;
}

.hero h1 {
    font-size: clamp(34px, 4vw, 56px);
    margin: 0 0 10px 0;
    letter-spacing: 0.5px;
}

.hero p {
    font-size: clamp(16px, 2vw, 20px);
    opacity: 0.95;
    margin: 0;
}

.btn {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 20px;
}

.btn:hover { filter: brightness(1.05); }

.section { padding: 80px 0; }

.section h2,
.services h2,
footer h2 {
    margin: 0;
    font-size: 32px;
    letter-spacing: 0.2px;
}

.section h2 + p,
.services h2 + p {
    margin-top: 10px;
    opacity: 0.9;
}

/* 业务卡片 */
.services {
    padding: 80px 0;
    background: url('assets/evercrest-services-bg.svg');
    background-size: cover;
    background-position: center;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.service-card:hover { transform: translateY(-10px); }

.service-card .icon { font-size: 50px; margin-bottom: 20px; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-card {
    background: #fff;
    border-radius: 12px;
    padding: 26px;
    border: 1px solid rgba(26, 42, 108, 0.08);
    box-shadow: 0 6px 22px rgba(0,0,0,0.04);
}

.feature-card h3 {
    margin: 0 0 10px 0;
    font-size: 18px;
    color: var(--primary-color);
}

.feature-card p { margin: 0; opacity: 0.9; }

.cta-row {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--primary-color);
    border: 1px solid rgba(26, 42, 108, 0.18);
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(4px);
    font-weight: 600;
}

.link-btn:hover { background: rgba(26, 42, 108, 0.06); }

/* 页脚 */
footer {
    background:
        url('assets/evercrest-footer-texture.svg'),
        var(--primary-color);
    background-size: cover;
    background-position: center;
    color: white;
    padding: 60px 0 20px;
    text-align: center;
}

.contact-info { margin-bottom: 30px; }

.footer-link {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* 语言切换逻辑显隐控制 */
.zh-mode .lang-en { display: none; }
.en-mode .lang-zh { display: none; }

.lang-switch button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--primary-color);
}

/* 内页通用头图 */
.page-hero {
    padding: 70px 0;
    color: #fff;
    background: linear-gradient(120deg, rgba(26, 42, 108, 0.88), rgba(178, 31, 31, 0.55)),
                url('assets/evercrest-hero.svg');
    background-size: cover;
    background-position: center;
}

.page-hero h1 {
    margin: 0 0 10px 0;
    font-size: clamp(30px, 3.5vw, 46px);
}

.page-hero p { margin: 0; opacity: 0.95; max-width: 860px; }

/* 文本排版 */
.lead { font-size: 18px; opacity: 0.92; }
.muted { opacity: 0.85; }

.two-col {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
    margin-top: 26px;
}

.panel {
    background: #fff;
    border-radius: 12px;
    padding: 22px;
    border: 1px solid rgba(26, 42, 108, 0.10);
    box-shadow: 0 8px 26px rgba(0,0,0,0.04);
}

.panel h3 { margin: 0 0 12px 0; color: var(--primary-color); }
.panel ul { margin: 0; padding-left: 18px; }
.panel li { margin: 8px 0; }

/* 表单 */
.contact-form {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.contact-form label {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 14px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    box-sizing: border-box;
    font: inherit;
    border-radius: 10px;
    border: 1px solid rgba(26, 42, 108, 0.18);
    padding: 10px 12px;
    outline: none;
    background: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: rgba(26, 42, 108, 0.45);
    box-shadow: 0 0 0 4px rgba(26, 42, 108, 0.10);
}

/* 响应式 */
@media (max-width: 860px) {
    .nav-links { display: none; }
    .two-col { grid-template-columns: 1fr; }
}