/* =================================================================
   诚达财税 - 代理记账公司网站样式
   ================================================================= */

/* ---------- 字体与基础变量 ---------- */
@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('../fonts/NotoSansSC-Regular.woff2') format('woff2');
}

@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('../fonts/NotoSansSC-Bold.woff2') format('woff2');
}

:root {
    /* 主色调：深蓝 + 金色 */
    --color-primary: #0a4d8f;
    --color-primary-dark: #073a6b;
    --color-primary-light: #1a6cc4;
    --color-accent: #c9a14a;
    --color-accent-dark: #a8842f;

    --color-text: #1f2a37;
    --color-text-light: #5b6677;
    --color-text-mute: #8a93a5;
    --color-bg: #ffffff;
    --color-bg-soft: #f5f7fa;
    --color-bg-dark: #0d1a2d;
    --color-border: #e3e8ef;
    --color-success: #2e9e5b;
    --color-danger: #d64545;

    --shadow-sm: 0 2px 8px rgba(15, 30, 60, 0.05);
    --shadow-md: 0 8px 24px rgba(15, 30, 60, 0.08);
    --shadow-lg: 0 16px 48px rgba(15, 30, 60, 0.12);
    --shadow-xl: 0 24px 60px rgba(15, 30, 60, 0.18);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --container: 1200px;
    --header-h: 80px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 重置与全局 ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

::selection {
    background: var(--color-primary);
    color: #fff;
}

/* ---------- 容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
    transition: all var(--transition);
    white-space: nowrap;
    cursor: pointer;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(10, 77, 143, 0.32);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.7);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    padding: 16px;
    font-size: 16px;
}

/* ---------- 区块通用 ---------- */
.section {
    padding: 96px 0;
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    color: var(--color-primary);
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 16px;
    padding: 6px 14px;
    background: rgba(10, 77, 143, 0.08);
    border-radius: 999px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    line-height: 1.25;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.section-head-light .section-tag {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

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

.section-head-light .section-desc {
    color: rgba(255, 255, 255, 0.8);
}

.text-accent {
    color: var(--color-accent);
}

/* ---------- 顶部公告条 ---------- */
.topbar {
    background: var(--color-bg-dark);
    color: #c8d0dc;
    font-size: 13px;
    padding: 10px 0;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.topbar-contact {
    display: flex;
    gap: 14px;
    align-items: center;
}

.topbar-divider {
    color: #445366;
}

/* ---------- 导航栏 ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 24px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 10px;
    color: var(--color-text-mute);
    letter-spacing: 1.5px;
    margin-top: 2px;
}

/* 主导航 */
.nav {
    flex: 1;
}

.nav-list {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.nav-link {
    display: inline-block;
    padding: 10px 16px;
    font-size: 15px;
    color: var(--color-text);
    font-weight: 500;
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition);
    transform: translateX(-50%);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 24px;
}

.nav-cta {
    flex-shrink: 0;
}

/* 移动端汉堡按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: calc(100vh - var(--header-h) - 40px);
    display: flex;
    align-items: center;
    overflow: hidden;
    color: #fff;
    padding: 80px 0;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('../images/hero.jpg') center center / cover no-repeat;
    transform: scale(1.05);
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    from { transform: scale(1.05); }
    to { transform: scale(1.15); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, rgba(7, 30, 60, 0.95) 0%, rgba(10, 77, 143, 0.82) 55%, rgba(10, 77, 143, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-text {
    max-width: 720px;
    animation: heroFadeIn 1.2s ease-out;
}

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

.hero-tag {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
}

.hero-title {
    font-size: clamp(34px, 5.5vw, 60px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 720px;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    display: inline-block;
}

.stat-unit {
    font-size: 18px;
    color: var(--color-accent);
    font-weight: 700;
    margin-left: 2px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 8px;
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    z-index: 2;
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 22px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    position: relative;
}

.scroll-dot {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: #fff;
    border-radius: 2px;
    animation: scrollWheel 1.8s ease infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; top: 6px; }
    100% { opacity: 0; top: 20px; }
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-6px); }
}

/* ---------- 服务项目 ---------- */
.services {
    background: var(--color-bg-soft);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid var(--color-border);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.service-card:hover .service-img img {
    transform: scale(1.08);
}

.service-body {
    padding: 28px;
    position: relative;
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    border-radius: 14px;
    margin-bottom: 18px;
    box-shadow: 0 8px 20px rgba(10, 77, 143, 0.25);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 18px;
}

.service-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 12px;
    padding-top: 18px;
    border-top: 1px dashed var(--color-border);
}

.service-list li {
    position: relative;
    padding-left: 22px;
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 161, 74, 0.18);
}

/* ---------- 核心优势 ---------- */
.advantages {
    background: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.adv-card {
    padding: 36px 28px;
    background: linear-gradient(180deg, #fff 0%, var(--color-bg-soft) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.adv-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.adv-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.adv-card:hover::before {
    transform: scaleX(1);
}

.adv-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(10, 77, 143, 0.08);
    color: var(--color-primary);
    border-radius: 16px;
    margin-bottom: 20px;
    transition: all var(--transition);
}

.adv-card:hover .adv-icon {
    background: var(--color-primary);
    color: #fff;
    transform: rotate(6deg) scale(1.05);
}

.adv-icon svg {
    width: 32px;
    height: 32px;
}

.adv-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.adv-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.75;
}

/* ---------- 服务流程 ---------- */
.process {
    background: linear-gradient(160deg, var(--color-bg-dark) 0%, #142b4d 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.process::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1) 30%, rgba(255, 255, 255, 0.1) 70%, transparent);
    z-index: 0;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.process-step {
    text-align: center;
    padding: 32px 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}

.process-step:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
    transform: translateY(-6px);
}

.step-num {
    font-size: 38px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-family: 'Georgia', serif;
}

.step-title {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.step-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
}

/* ---------- 客户案例 ---------- */
.cases {
    background: var(--color-bg-soft);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.case-card {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    position: relative;
    transition: all var(--transition);
}

.case-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 72px;
    color: var(--color-primary);
    opacity: 0.08;
    font-family: Georgia, serif;
    line-height: 1;
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(10, 77, 143, 0.08);
    color: var(--color-primary);
    font-size: 12px;
    border-radius: 999px;
    margin-bottom: 16px;
    font-weight: 500;
}

.case-rate {
    color: var(--color-accent);
    font-size: 16px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.case-quote {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.85;
    margin-bottom: 24px;
    font-style: italic;
}

.case-meta {
    padding-top: 18px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.case-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

.case-company {
    font-size: 12px;
    color: var(--color-text-mute);
}

.cases-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-xl);
    color: #fff;
    text-align: center;
}

.case-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cs-num {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.cs-plus {
    font-size: 24px;
    color: var(--color-accent);
    font-weight: 700;
}

.cs-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 10px;
}

/* ---------- 关于我们 ---------- */
.about {
    background: #fff;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-img {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 3;
}

.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: #fff;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.badge-num {
    font-size: 40px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.badge-text {
    font-size: 12px;
    color: var(--color-text-light);
}

.about-text .section-tag {
    margin-bottom: 12px;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.about-lead {
    font-size: 18px;
    color: var(--color-text);
    font-weight: 500;
    line-height: 1.7;
    margin-bottom: 18px;
}

.about-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.85;
    margin-bottom: 14px;
}

.about-list {
    margin: 24px 0 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 16px;
}

.about-list li {
    position: relative;
    padding-left: 26px;
    font-size: 14px;
    color: var(--color-text);
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(10, 77, 143, 0.15);
}

.about-list li::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 10px;
    width: 8px;
    height: 4px;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(-45deg);
}

/* ---------- 联系我们 ---------- */
.contact {
    background: linear-gradient(160deg, var(--color-bg-dark) 0%, #142b4d 100%);
    color: #fff;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.info-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}

.info-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-4px);
}

.info-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: #fff;
    border-radius: 12px;
}

.info-icon svg {
    width: 22px;
    height: 22px;
}

.info-title {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    margin-bottom: 6px;
}

.info-text {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 2px;
}

.info-sub {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* 联系表单 */
.contact-form {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.form-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 2px solid var(--color-bg-soft);
    position: relative;
}

.form-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--color-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

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

.form-label {
    display: block;
    font-size: 13px;
    color: var(--color-text);
    margin-bottom: 8px;
    font-weight: 500;
}

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

.form-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg-soft);
    transition: all var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(10, 77, 143, 0.12);
}

.form-input::placeholder {
    color: var(--color-text-mute);
}

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

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--color-text-light);
    cursor: pointer;
}

.form-check input {
    margin-top: 3px;
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}

.form-check a {
    color: var(--color-primary);
    text-decoration: underline;
}

.form-input.invalid {
    border-color: var(--color-danger);
    background: #fef6f6;
}

.form-tip {
    font-size: 12px;
    color: var(--color-text-mute);
    text-align: center;
    margin-top: 14px;
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--color-bg-dark);
    color: #aab3c2;
    padding: 72px 0 24px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo-img {
    background: #fff;
}

.footer-brand .logo-name {
    color: #fff;
}

.footer-brand .logo-sub {
    color: var(--color-text-mute);
}

.footer-desc {
    margin: 20px 0;
    font-size: 14px;
    line-height: 1.75;
    color: #8a93a5;
}

.footer-contact p {
    font-size: 13px;
    color: #aab3c2;
    margin-bottom: 6px;
}

.footer-title {
    font-size: 16px;
    color: #fff;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-accent);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a,
.footer-contact-list li {
    font-size: 14px;
    color: #aab3c2;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-contact-list li {
    line-height: 1.7;
    margin-bottom: 10px;
}

.footer-bottom {
    padding-top: 24px;
    text-align: center;
    font-size: 12px;
    color: #6b7585;
}

.footer-icp {
    margin-top: 8px;
}

/* ---------- 悬浮按钮 ---------- */
.float-cta,
.float-top {
    position: fixed;
    right: 24px;
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    color: #fff;
}

.float-cta {
    bottom: 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    width: auto;
    height: 56px;
    padding: 0 20px;
    border-radius: 999px;
    flex-direction: row;
    gap: 8px;
}

.float-cta svg {
    width: 22px;
    height: 22px;
}

.float-text {
    font-size: 14px;
    font-weight: 500;
}

.float-cta:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 12px 28px rgba(10, 77, 143, 0.4);
}

.float-top {
    bottom: 100px;
    background: rgba(15, 30, 60, 0.85);
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

.float-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.float-top svg {
    width: 22px;
    height: 22px;
}

.float-top:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

/* ---------- 提示弹窗 ---------- */
.toast {
    position: fixed;
    top: 100px;
    right: 24px;
    z-index: 200;
    display: flex;
    align-items: center;
    gap: 16px;
    background: #fff;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--color-success);
    min-width: 320px;
    max-width: 400px;
    transform: translateX(120%);
    transition: transform var(--transition-slow);
}

.toast.show {
    transform: translateX(0);
}

.toast-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: var(--color-success);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-icon svg {
    width: 20px;
    height: 20px;
}

.toast-body {
    flex: 1;
}

.toast-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.toast-text {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.5;
}

.toast-close {
    font-size: 22px;
    color: var(--color-text-mute);
    width: 24px;
    height: 24px;
    line-height: 1;
    transition: color var(--transition);
}

.toast-close:hover {
    color: var(--color-text);
}

/* ---------- 滚动动画 ---------- */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }
    .process-steps .process-step:nth-child(4),
    .process-steps .process-step:nth-child(5) {
        grid-column: span 1;
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
    .footer-brand {
        grid-column: 1 / -1;
    }
    .about-grid {
        gap: 40px;
    }
    .contact-grid {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-h: 64px;
    }
    .section {
        padding: 64px 0;
    }
    .container {
        padding: 0 20px;
    }
    .section-head {
        margin-bottom: 40px;
    }

    /* 顶部公告条 */
    .topbar {
        font-size: 12px;
    }
    .topbar-inner {
        justify-content: center;
        text-align: center;
    }
    .topbar-contact {
        display: none;
    }

    /* 导航 */
    .nav-cta {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        height: 0;
        background: #fff;
        overflow: hidden;
        transition: height var(--transition);
        z-index: 99;
        box-shadow: var(--shadow-md);
    }
    .nav.open {
        height: calc(100vh - var(--header-h));
        overflow-y: auto;
    }
    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: 16px;
    }
    .nav-list li {
        border-bottom: 1px solid var(--color-border);
    }
    .nav-link {
        display: block;
        padding: 14px 12px;
        font-size: 16px;
    }
    .nav-link::after {
        display: none;
    }

    /* Hero */
    .hero {
        padding: 60px 0;
        min-height: 600px;
    }
    .hero-title {
        font-size: 32px;
    }
    .hero-desc {
        font-size: 15px;
    }
    .hero-actions {
        gap: 12px;
    }
    .hero-actions .btn {
        flex: 1;
        padding: 14px 20px;
    }
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .stat-num {
        font-size: 28px;
    }
    .hero-scroll {
        display: none;
    }

    /* 服务 */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .service-list {
        grid-template-columns: 1fr 1fr;
    }

    /* 优势 */
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    /* 流程 */
    .process-steps {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .process::before {
        display: none;
    }
    .process-step {
        text-align: left;
        padding: 24px;
        display: flex;
        align-items: center;
        gap: 20px;
    }
    .step-num {
        font-size: 28px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
    .step-title {
        font-size: 18px;
        margin-bottom: 4px;
    }
    .step-desc {
        font-size: 13px;
    }

    /* 案例 */
    .cases-grid {
        grid-template-columns: 1fr;
    }
    .cases-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 16px;
        padding: 32px 20px;
    }
    .cs-num {
        font-size: 36px;
    }

    /* 关于 */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .about-list {
        grid-template-columns: 1fr;
    }
    .about-badge {
        padding: 14px 18px;
    }
    .badge-num {
        font-size: 28px;
    }

    /* 联系 */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .contact-info {
        grid-template-columns: 1fr;
    }
    .contact-form {
        padding: 24px;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 0;
    }

    /* 页脚 */
    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 32px;
    }
    .footer-brand {
        margin-bottom: 0;
    }

    /* 悬浮按钮 */
    .float-cta {
        right: 16px;
        bottom: 20px;
        padding: 0 16px;
        height: 48px;
    }
    .float-cta svg,
    .float-top svg {
        width: 20px;
        height: 20px;
    }
    .float-top {
        right: 16px;
        bottom: 80px;
        width: 48px;
        height: 48px;
    }

    /* Toast */
    .toast {
        right: 16px;
        left: 16px;
        min-width: 0;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .cases-stats {
        grid-template-columns: 1fr 1fr;
    }
    .service-list {
        grid-template-columns: 1fr;
    }
    .float-cta .float-text {
        display: none;
    }
    .float-cta {
        width: 48px;
        height: 48px;
        padding: 0;
        border-radius: 50%;
    }
}

/* ---------- 打印 ---------- */
@media print {
    .header, .topbar, .float-cta, .float-top, .hero-scroll, .toast {
        display: none;
    }
    body {
        color: #000;
        background: #fff;
    }
    .hero {
        min-height: auto;
    }
}