/* ============================================
   易峰软件科技 - 官方网站样式
   ============================================ */

/* --- CSS 变量 --- */
:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #DBEAFE;
    --color-accent: #7C3AED;
    --color-accent-light: #EDE9FE;
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);

    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* --- 容器 --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- 分区 --- */
.section {
    padding: 100px 0;
}

.section--gray {
    background-color: var(--color-gray-50);
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section__tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section__title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section__desc {
    font-size: 18px;
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.45);
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.header--scrolled {
    border-bottom-color: var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav__logo-icon {
    flex-shrink: 0;
}

.nav__logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-gray-900);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav__link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition);
}

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

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

/* 汉堡菜单 */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 100;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    transition: all var(--transition);
    border-radius: 2px;
}

.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(5px, -5px);
}

/* ============================================
   Hero / 首页
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(180deg, #F0F4FF 0%, #FFFFFF 100%);
    padding: 120px 0 80px;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero__bg-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.hero__bg-circle--1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -150px;
    animation: float 8s ease-in-out infinite;
}

.hero__bg-circle--2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.hero__bg-circle--3 {
    width: 200px;
    height: 200px;
    background: var(--color-primary);
    top: 50%;
    left: 50%;
    animation: float 6s ease-in-out infinite 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.hero__content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
}

.hero__title {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 28px;
}

.hero__title-line {
    font-size: 52px;
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.hero__title-line--accent {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 20px;
    color: var(--color-gray-500);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero__stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.hero__stat {
    display: flex;
    align-items: baseline;
    gap: 2px;
    flex-direction: column;
}

.hero__stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1;
}

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

.hero__stat-label {
    font-size: 15px;
    color: var(--color-gray-400);
    margin-top: 4px;
}

.hero__stat > span:first-of-type {
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
}

/* ============================================
   关于我们
   ============================================ */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about__image-wrapper {
    position: relative;
}

.about__image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.about__image-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 16px;
    left: 16px;
    border: 3px solid var(--color-primary);
    border-radius: var(--radius-xl);
    opacity: 0.2;
}

.about__heading {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 16px;
}

.about__text {
    font-size: 16px;
    color: var(--color-gray-500);
    line-height: 1.8;
    margin-bottom: 32px;
}

.about__features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about__feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.about__feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about__feature h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 4px;
}

.about__feature p {
    font-size: 14px;
    color: var(--color-gray-400);
}

/* ============================================
   ERP系统
   ============================================ */
.erp__layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.erp__heading {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 16px;
}

.erp__text {
    font-size: 16px;
    color: var(--color-gray-500);
    line-height: 1.8;
    margin-bottom: 24px;
}

.erp__highlights {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 0;
}

.erp__highlight {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--color-gray-600);
}

.erp__highlight-icon {
    color: var(--color-primary);
    font-size: 8px;
    flex-shrink: 0;
}

.erp__modules {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.erp-module {
    background: var(--color-white);
    padding: 24px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition);
}

.erp-module:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.erp-module__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.erp-module__icon--blue { background: #EEF2FF; }
.erp-module__icon--green { background: #ECFDF5; }
.erp-module__icon--orange { background: #FFF7ED; }
.erp-module__icon--purple { background: #F5F3FF; }
.erp-module__icon--cyan { background: #ECFEFF; }
.erp-module__icon--red { background: #FEF2F2; }

.erp-module h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 6px;
}

.erp-module p {
    font-size: 13px;
    color: var(--color-gray-400);
    line-height: 1.5;
}

/* ============================================
   考勤系统
   ============================================ */
.attendance__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.attendance__image-placeholder {
    width: 100%;
    aspect-ratio: 1/1;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.attendance__feature {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.attendance__feature-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--color-white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.attendance__feature h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 4px;
}

.attendance__feature p {
    font-size: 13px;
    color: var(--color-gray-400);
    line-height: 1.5;
}

/* ============================================
   案例展示
   ============================================ */
.cases__overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 48px;
}

.cases__overview-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 32px;
    border: 1px solid var(--color-gray-100);
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: all var(--transition);
}

.cases__overview-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

.cases__overview-img {
    flex-shrink: 0;
    position: relative;
}

.cases__overview-placeholder {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cases__badge {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    font-weight: 600;
    background: var(--color-primary);
    color: white;
    padding: 3px 12px;
    border-radius: 10px;
    white-space: nowrap;
}

.cases__badge--pink {
    background: #EC4899;
}

.cases__badge--green {
    background: #059669;
}

.cases__badge--orange {
    background: #EA580C;
}

.cases__badge--blue {
    background: #2563EB;
}

.cases__badge--teal {
    background: #0D9488;
}

.cases__overview-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 8px;
}

.cases__overview-body p {
    font-size: 14px;
    color: var(--color-gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.cases__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.cases__tags li {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* 功能模块 */
.cases__modules-title,
.cases__tech-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 24px;
    text-align: center;
}

.cases__modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.cases__module {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: var(--color-gray-50);
    padding: 20px;
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.cases__module:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.cases__module-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cases__module-icon--blue { background: #EEF2FF; }
.cases__module-icon--green { background: #ECFDF5; }
.cases__module-icon--orange { background: #FFF7ED; }
.cases__module-icon--purple { background: #F5F3FF; }
.cases__module-icon--cyan { background: #ECFEFF; }
.cases__module-icon--red { background: #FEF2F2; }

.cases__module h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 4px;
}

.cases__module p {
    font-size: 13px;
    color: var(--color-gray-400);
    line-height: 1.5;
}

/* 技术架构 */
.cases__tech {
    background: linear-gradient(135deg, #F8FAFC, #EEF2FF);
    border-radius: var(--radius-xl);
    padding: 40px;
}

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

.cases__tech-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary-light);
}

.cases__tech-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.cases__tech-col li {
    font-size: 14px;
    color: var(--color-gray-600);
    line-height: 1.5;
}

.cases__tech-col li strong {
    color: var(--color-gray-700);
}

/* ============================================
   联系我们
   ============================================ */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact__info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact__info-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact__info-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: 4px;
}

.contact__info-item p {
    font-size: 14px;
    color: var(--color-gray-500);
    line-height: 1.6;
}

.contact__form {
    background: var(--color-white);
    padding: 36px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-md);
}

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

.contact__form-group {
    margin-bottom: 18px;
}

.contact__form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 6px;
}

.contact__form-group input,
.contact__form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    background: var(--color-gray-50);
    color: var(--color-gray-800);
    transition: all var(--transition);
    font-family: var(--font-sans);
    outline: none;
}

.contact__form-group input:focus,
.contact__form-group textarea:focus {
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact__form-group input::placeholder,
.contact__form-group textarea::placeholder {
    color: var(--color-gray-400);
}

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

/* 表单消息提示 */
.contact__form-message {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    transition: all var(--transition);
}

.contact__form-message--success {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.contact__form-message--error {
    background: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: 60px 0 30px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer__brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer__logo span {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-white);
}

.footer__desc {
    font-size: 14px;
    line-height: 1.7;
    max-width: 300px;
}

.footer__links h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer__links a {
    font-size: 14px;
    color: var(--color-gray-400);
    transition: color var(--transition);
}

.footer__links a:hover {
    color: var(--color-white);
}

.footer__qrcode h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer__qrcode-box {
    background: white;
    padding: 8px;
    border-radius: var(--radius);
    display: inline-block;
    margin-bottom: 8px;
}

.footer__qrcode-text {
    font-size: 12px;
    color: var(--color-gray-500);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--color-gray-500);
}

/* ============================================
   回到顶部按钮
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   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);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .erp__modules {
        grid-template-columns: repeat(2, 1fr);
    }

    .about__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .attendance__grid {
        grid-template-columns: 1fr;
    }

    .cases__modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .attendance__features {
        grid-template-columns: 1fr 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .erp__layout {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .erp__modules {
        grid-template-columns: 1fr 1fr;
    }

    .attendance__grid {
        grid-template-columns: 1fr;
    }

    .attendance__features {
        grid-template-columns: 1fr;
    }

    .cases__overview {
        grid-template-columns: 1fr;
    }

    .cases__modules-grid {
        grid-template-columns: 1fr;
    }

    .cases__tech-stack {
        grid-template-columns: 1fr;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 100px 32px 32px;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition);
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__link {
        display: block;
        padding: 14px 0;
        font-size: 16px;
        border-bottom: 1px solid var(--color-gray-100);
    }

    .nav__toggle {
        display: flex;
    }

    .hero__title-line {
        font-size: 34px;
    }

    .hero__subtitle {
        font-size: 16px;
    }

    .hero__stats {
        gap: 30px;
    }

    .hero__stat-number {
        font-size: 32px;
    }

    .section__title {
        font-size: 26px;
    }

    .section__desc {
        font-size: 15px;
    }

    .contact__grid {
        grid-template-columns: 1fr;
    }

    .contact__form-row {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .section {
        padding: 60px 0;
    }

    .hero {
        padding: 100px 0 60px;
    }
}

@media (max-width: 480px) {
    .hero__title-line {
        font-size: 26px;
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .hero__stats {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .cases__overview-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .cases__tags {
        justify-content: center;
    }

    .cases__tech {
        padding: 24px;
    }
}