/* ====================================================
   公共样式表 — 全站共用
   包含：全局重置 / 变量 / 导航 / 页尾 / 表单 / 通用组件 / 模态框 / 浮动按钮
   ==================================================== */

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: #F5F7FA;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #1A2A3A;
    line-height: 1.7;
    font-size: 16px;
}

img {
    -webkit-user-drag: none;
    user-drag: none;
    max-width: 100%;
    display: block;
}

:root {
    --primary: #1677FF;
    --primary-dark: #0050B3;
    --primary-light: #E6F0FF;
    --primary-soft: rgba(22, 119, 255, 0.06);
    --primary-gradient: linear-gradient(135deg, #1677FF 0%, #0050B3 100%);
    --green: #00A854;
    --green-light: #E6F7ED;
    --orange: #FF6A00;
    --orange-light: #FFF0E6;
    --gray-50: #F8FAFC;
    --gray-100: #F1F4F8;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.2, 0.95, 0.4, 1);
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1680px;
    margin: 0 auto;
    padding: 0 60px;
}

.section-padding {
    padding: 90px 0;
}

.section-title {
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.section-title span {
    color: var(--primary);
    background: linear-gradient(135deg, #1677FF, #0050B3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--gray-500);
    max-width: 680px;
    line-height: 1.7;
}

.section-header {
    text-align: center;
    margin-bottom: 52px;
}

.section-header .section-subtitle {
    margin: 0 auto;
}

@media (max-width: 1200px) {
    .container {
        padding: 0 32px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    .section-padding {
        padding: 56px 0;
    }
    .section-title {
        font-size: 2rem;
    }
    .section-subtitle {
        font-size: 1rem;
    }
}

/* ====================================================
   导航栏（全站共用）
   ==================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 60px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
}

.header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.header .logo img {
    height: 40px;
    width: auto;
}

.header .logo .badge {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 12px;
    border-radius: 40px;
    margin-left: 4px;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: #202328;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
    padding: 4px 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2.5px;
    background: var(--primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.header-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-cta .phone {
    font-weight: 600;
    color: var(--primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary-nav {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 28px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.25s;
}

.btn-primary-nav:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.3);
}

.btn-trial-nav {
    background: var(--orange);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.25s;
    animation: pulse-orange 2s infinite;
}

@keyframes pulse-orange {
    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(255, 106, 0, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(255, 106, 0, 0);
    }
}

.btn-trial-nav:hover {
    background: #E55D00;
    transform: translateY(-2px);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-700);
    cursor: pointer;
}

@media (max-width: 1200px) {
    .header {
        padding: 12px 32px;
    }
    .nav-links {
        gap: 24px;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px 32px;
        gap: 16px;
        box-shadow: 0 20px 48px rgba(0, 0, 0, 0.1);
        border-top: 1px solid var(--gray-200);
    }
    .nav-links.open {
        display: flex;
    }
    .mobile-menu-btn {
        display: block;
    }
    .header-cta .phone {
        display: none;
    }
    .btn-trial-nav,
    .btn-primary-nav {
        padding: 8px 16px;
        font-size: 13px;
    }
}

@media (max-width: 640px) {
    .header {
        padding: 10px 16px;
    }
    .header .logo img {
        height: 32px;
    }
    .header .logo .badge {
        font-size: 9px;
        padding: 1px 8px;
    }
    .btn-trial-nav,
    .btn-primary-nav {
        padding: 6px 12px;
        font-size: 12px;
    }
}

.main-content {
    padding-top: 72px;
}

/* ====================================================
   联系表单（全站共用）
   ==================================================== */

.contact-section {
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--gray-900);
}

.contact-info .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--gray-100);
}

.contact-info .contact-item:last-child {
    border-bottom: none;
}

.contact-info .contact-item i {
    width: 40px;
    height: 40px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-info .contact-item .label {
    font-size: 13px;
    color: var(--gray-500);
}

.contact-info .contact-item .value {
    font-weight: 600;
    color: var(--gray-800);
    font-size: 16px;
}

.contact-info .contact-item .value a {
    color: var(--primary);
    text-decoration: none;
}

.contact-info .contact-item .value a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.contact-form h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

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

.contact-form .form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 4px;
}

.contact-form .form-group label .required {
    color: #EF4444;
    margin-left: 2px;
}

.contact-form .form-group input,
.contact-form .form-group textarea,
.contact-form .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
    background: white;
}

.contact-form .form-group input:focus,
.contact-form .form-group textarea:focus,
.contact-form .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.1);
}

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

.contact-form .btn-submit {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 40px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.25s;
    width: 100%;
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.2);
}

.contact-form .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.3);
}

.contact-form .form-hint {
    font-size: 12px;
    color: var(--gray-400);
    text-align: center;
    margin-top: 12px;
}

@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* ====================================================
   页尾（全站共用）
   ==================================================== */

.footer {
    background: var(--gray-900);
    color: rgba(255, 255, 255, 0.7);
    padding: 52px 0 32px;
}

.footer .container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer h4 {
    color: white;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer p,
.footer a {
    font-size: 14px;
    line-height: 2;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

.footer .footer-logo {
    font-size: 20px;
    font-weight: 800;
    color: white;
    margin-bottom: 8px;
}

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

.footer .footer-bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    margin-top: 8px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer .footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

.footer .footer-bottom a:hover {
    color: white;
}

@media (max-width: 900px) {
    .footer .container {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 640px) {
    .footer .container {
        grid-template-columns: 1fr;
    }
}

/* ====================================================
   模态框（全站共用）
   ==================================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px 36px 40px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-content .modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 24px;
    color: var(--gray-400);
    cursor: pointer;
    background: none;
    border: none;
    transition: color 0.2s;
}

.modal-content .modal-close:hover {
    color: var(--gray-800);
}

.modal-content .modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.modal-content img {
    max-width: 250px;
    margin: 0 auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

.modal-content .modal-hint {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 12px;
}

/* ====================================================
   浮动按钮（全站共用）
   ==================================================== */

.float-consult {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: flex-end;
}

.float-consult .btn-float {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.35);
    transition: all 0.25s;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.float-consult .btn-float:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 36px rgba(22, 119, 255, 0.45);
}

.float-consult .btn-float.wx {
    background: #07c160;
    box-shadow: 0 8px 24px rgba(7, 193, 96, 0.3);
}

.float-consult .btn-float.wx:hover {
    box-shadow: 0 12px 36px rgba(7, 193, 96, 0.4);
}

@media (max-width: 640px) {
    .float-consult .btn-float {
        padding: 10px 18px;
        font-size: 13px;
    }
    .float-consult .btn-float span {
        display: none;
    }
}