/* ========================================
   厦门华益信会计师事务所 - 网站样式
   配色：浅蓝色调（与logo协调）
   ======================================== */

/* ====== 基础重置 ====== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #1E88E5;          /* 主色 - 天空蓝 */
    --color-primary-dark: #1565C0;     /* 深蓝（hover/active） */
    --color-primary-light: #4FC3F7;    /* 亮蓝（与logo同色系） */
    --color-primary-lighter: #B3E5FC;  /* 极浅蓝 */
    --color-primary-bg: #E3F2FD;       /* 背景浅蓝 */
    --color-accent: #43A047;            /* 强调色 - 绿色（logo绿字） */
    --color-accent-dark: #2E7D32;
    --color-text: #1a3a5c;
    --color-text-light: #5a6c7d;
    --color-bg: #ffffff;
    --color-bg-alt: #F5FAFE;
    --color-border: #DBE9F5;
    --color-white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(30, 136, 229, 0.08);
    --shadow-md: 0 4px 20px rgba(30, 136, 229, 0.12);
    --shadow-lg: 0 8px 40px rgba(30, 136, 229, 0.16);
    --radius: 8px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 80px 0;
}

/* ====== 通用按钮 ====== */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
}
.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.7);
}
.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}
.btn-full { width: 100%; }

/* ====== Section Header ====== */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 3px;
    margin-bottom: 12px;
}
.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}
.section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
    margin: 0 auto;
    border-radius: 2px;
}
.section-desc {
    margin-top: 20px;
    color: var(--color-text-light);
    font-size: 15px;
}

/* ====== 导航栏 ====== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 76px;
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}
.navbar.scrolled {
    height: 68px;
    box-shadow: var(--shadow-md);
}
.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
}
.logo-img {
    height: 54px;
    width: auto;
    transition: var(--transition);
}
.navbar.scrolled .logo-img {
    height: 48px;
}
.nav-menu {
    display: flex;
    gap: 8px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    color: var(--color-text);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 24px;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ====== Hero ====== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4FC3F7 0%, #29B6F6 50%, #1E88E5 100%);
    text-align: center;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,0.10) 0%, transparent 40%);
}
.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0h60v60H0z' fill='none'/%3E%3Cpath d='M0 0v60M15 0v60M30 0v60M45 0v60M60 0v60' stroke='rgba(255,255,255,0.04)' stroke-width='1'/%3E%3C/svg%3E");
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 24px;
    animation: fadeInUp 1s ease;
}
.hero-subtitle {
    color: rgba(255,255,255,0.85);
    font-size: 14px;
    letter-spacing: 3px;
    margin-bottom: 20px;
    padding: 6px 16px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    display: inline-block;
}
.hero-title {
    font-size: 46px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 4px;
    line-height: 1.3;
}
.hero-slogan {
    font-size: 22px;
    color: var(--color-white);
    letter-spacing: 6px;
    margin-bottom: 14px;
    font-weight: 400;
    opacity: 0.95;
}
.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 36px;
    letter-spacing: 1px;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ====== 数据统计条 ====== */
.stats-bar {
    background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-primary-lighter) 100%);
    padding: 48px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-item {
    border-right: 1px solid rgba(30,136,229,0.15);
}
.stat-item:last-child { border-right: none; }
.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}
.stat-suffix {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}
.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 15px;
    color: var(--color-text-light);
}

/* ====== 公司简介 ====== */
.about {
    background: var(--color-bg);
}
.about-content {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 48px;
    align-items: start;
}
.about-text p {
    color: var(--color-text-light);
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.9;
    text-align: justify;
}
.about-text ul {
    margin-top: 12px;
}
.about-text ul li {
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.8;
    padding: 6px 0 6px 22px;
    position: relative;
}
.about-text ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    top: 6px;
    color: var(--color-primary);
    font-size: 16px;
}
.project-list li {
    padding-left: 22px !important;
}
.about-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.about-card {
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-primary);
    padding: 24px 28px;
    border-radius: var(--radius);
    transition: var(--transition);
}
.about-card:hover {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    transform: translateX(6px);
}
.about-card:hover h3,
.about-card:hover p,
.about-card:hover .about-card-icon {
    color: var(--color-white);
}
.about-card-icon {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-transform: uppercase;
    transition: var(--transition);
}
.about-card h3 {
    font-size: 17px;
    color: var(--color-text);
    margin-bottom: 8px;
    transition: var(--transition);
}
.about-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    transition: var(--transition);
}

/* ====== 业务范围 ====== */
.services {
    background: var(--color-bg-alt);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.service-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 36px 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 4px solid transparent;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-top-color: var(--color-primary);
}
.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-white);
    transition: var(--transition);
}
.service-icon svg {
    width: 28px;
    height: 28px;
}
.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    transform: rotate(-5deg) scale(1.05);
}
.service-card h3 {
    font-size: 20px;
    color: var(--color-text);
    margin-bottom: 16px;
    font-weight: 600;
}
.service-list li {
    font-size: 14px;
    color: var(--color-text-light);
    padding: 6px 0;
    padding-left: 18px;
    position: relative;
}
.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* ====== 专业团队 ====== */
.team {
    background: var(--color-bg);
}
.leader-card {
    background: var(--color-bg-alt);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.leader-card:hover {
    box-shadow: var(--shadow-lg);
}
.leader-header {
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 36px 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}
.leader-avatar {
    flex-shrink: 0;
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(8px);
    border: 3px solid rgba(255,255,255,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    overflow: hidden;
    font-size: 38px;
    font-weight: 700;
    font-family: "PingFang SC", "Microsoft YaHei", serif;
}
.leader-avatar .avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}
.leader-basic h3 {
    font-size: 28px;
    color: var(--color-white);
    margin-bottom: 6px;
    letter-spacing: 2px;
}
.leader-title {
    font-size: 15px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 14px;
}
.leader-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.leader-tags span {
    font-size: 12px;
    padding: 5px 12px;
    background: rgba(255,255,255,0.2);
    color: var(--color-white);
    border-radius: 20px;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.3);
}

.leader-body {
    padding: 32px 40px 40px;
}
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 20px 24px;
    background: var(--color-white);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    margin-bottom: 28px;
}
.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.info-label {
    font-size: 12px;
    color: var(--color-text-light);
    font-weight: 500;
}
.info-value {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 600;
}

.leader-section {
    margin-top: 24px;
}
.leader-section h4 {
    font-size: 17px;
    color: var(--color-primary);
    margin-bottom: 14px;
    padding-left: 14px;
    border-left: 4px solid var(--color-primary);
}
.qual-list li {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
    padding: 6px 0 6px 22px;
    position: relative;
}
.qual-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.7;
}
.qual-list strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* ====== 核心优势 ====== */
.advantage {
    background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-primary-lighter) 100%);
    color: var(--color-text);
}
.advantage .section-title { color: var(--color-text); }
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-item {
    text-align: center;
    padding: 28px 24px;
    background: var(--color-white);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}
.advantage-item:hover {
    background: var(--color-white);
    border-color: var(--color-primary);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.advantage-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
    opacity: 0.8;
}
.advantage-item h3 {
    font-size: 18px;
    color: var(--color-text);
    margin-bottom: 12px;
}
.advantage-item p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ====== 联系我们 ====== */
.contact {
    background: var(--color-bg-alt);
}
.contact-info-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.contact-info-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}
.contact-info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}
.contact-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    margin: 0 auto 16px;
    transition: var(--transition);
}
.contact-icon svg {
    width: 26px;
    height: 26px;
}
.contact-info-card:hover .contact-icon {
    transform: rotate(-5deg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
}
.contact-info-card h4 {
    font-size: 16px;
    color: var(--color-text);
    margin-bottom: 8px;
}
.contact-info-card p {
    font-size: 14px;
    color: var(--color-text-light);
    word-break: break-all;
}

.map-section {
    background: var(--color-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}
.map-header {
    padding: 24px 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}
.map-header h3 {
    font-size: 22px;
    color: var(--color-white);
    margin-bottom: 4px;
}
.map-header p {
    font-size: 14px;
    color: rgba(255,255,255,0.85);
}
.map-container {
    position: relative;
    height: 460px;
    overflow: hidden;
}
.map-fallback {
    position: relative;
    width: 100%;
    height: 100%;
}
.map-container iframe {
    display: block;
}
.map-mask {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
}
.map-link-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 24px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}
.map-link-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ====== 页脚 ====== */
.footer {
    background: linear-gradient(135deg, #1565C0 0%, #0D47A1 100%);
    color: var(--color-white);
    padding: 56px 0 0;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: 16px;
    background: var(--color-white);
    padding: 6px 10px;
    border-radius: var(--radius);
}
.footer-brand h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--color-white);
}
.footer-slogan {
    font-size: 14px;
    color: var(--color-primary-lighter);
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.footer-desc {
    color: rgba(255,255,255,0.6) !important;
    line-height: 1.7;
    font-size: 13px !important;
}
.footer-links h4 {
    font-size: 15px;
    margin-bottom: 16px;
    color: var(--color-white);
}
.footer-links ul li {
    margin-bottom: 10px;
    font-size: 14px;
    color: rgba(255,255,255,0.65);
    line-height: 1.6;
}
.footer-links ul li a {
    color: rgba(255,255,255,0.65);
    transition: var(--transition);
}
.footer-links ul li a:hover {
    color: var(--color-primary-lighter);
    padding-left: 4px;
}
.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ====== 返回顶部 ====== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}
.back-to-top svg {
    width: 24px;
    height: 24px;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ====== 滚动动画 ====== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 968px) {
    .about-content,
    .footer-top {
        grid-template-columns: 1fr;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-info-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        padding: 16px 24px;
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition);
    }
    .nav-menu.active {
        transform: translateY(0);
    }
    .nav-link {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid var(--color-border);
    }
    .nav-link::after { display: none; }
    .nav-toggle {
        display: flex;
    }
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-title { font-size: 30px; letter-spacing: 2px; }
    .hero-slogan { font-size: 16px; letter-spacing: 3px; }
    .section-title { font-size: 26px; }
    .section-padding { padding: 56px 0; }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    .stat-item:nth-child(2) { border-right: none; }

    .services-grid,
    .advantage-grid,
    .contact-info-bar {
        grid-template-columns: 1fr;
    }
    .leader-header {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
    }
    .leader-tags {
        justify-content: center;
    }
    .leader-basic h3 { font-size: 24px; }
    .leader-body { padding: 24px; }
    .info-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    .map-container {
        height: 360px;
    }
    .footer-brand .footer-logo {
        height: 50px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .logo-img { height: 44px; }
    .hero-title { font-size: 24px; }
    .stat-number { font-size: 34px; }
    .leader-avatar {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }
    .map-container {
        height: 300px;
    }
}