/* ====== Reset & Base ====== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-300: #86efac;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --green-800: #166534;
    --green-900: #14532d;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --white: #ffffff;
    --max-width: 1200px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,.08);
    --shadow-lg: 0 20px 60px rgba(20,83,45,.1);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--slate-800);
    background: #f6f8f6;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 全局网格底图 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(34,197,94,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34,197,94,.04) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 0;
    pointer-events: none;
}

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

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

ul { list-style: none; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ====== Navbar / 菜单 ======
   手机端(<991px): 汉堡→全屏白色菜单(大字居中,带渐进入场)
   电脑端(>=992px): 顶部横排导航(不用汉堡) */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all .3s ease;
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 12px 0;
    border-bottom-color: var(--slate-200);
    box-shadow: var(--shadow-sm);
    background: rgba(255,255,255,.97);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--green-700);
    position: relative;
    z-index: 1002;
}

.logo-icon { font-size: 24px; color: var(--green-500); }

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

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--slate-600);
    transition: color .2s;
    position: relative;
    white-space: nowrap;
    padding: 6px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--green-500);
    border-radius: 2px;
    transition: width .3s;
}

.nav-link:hover, .nav-link.active { color: var(--green-700); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    position: relative;
    z-index: 1002;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--slate-700);
    border-radius: 2px;
    transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- 手机端全屏菜单 ---- */
@media (max-width: 991px) {
    .nav-menu {
        position: fixed;
        top: 0; left: 0;
        width: 100%;
        height: 100vh;
        background: var(--white);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 8px;
        opacity: 0;
        visibility: hidden;
        transition: opacity .3s ease, visibility .3s ease;
        z-index: 1001;
    }

    .nav-menu.open {
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
        border-bottom: none;
        opacity: 0;
        transform: translateY(14px);
        transition: opacity .35s ease, transform .35s ease;
    }

    .nav-menu.open li { opacity: 1; transform: translateY(0); }
    .nav-menu.open li:nth-child(1) { transition-delay: .05s; }
    .nav-menu.open li:nth-child(2) { transition-delay: .1s; }
    .nav-menu.open li:nth-child(3) { transition-delay: .15s; }
    .nav-menu.open li:nth-child(4) { transition-delay: .2s; }
    .nav-menu.open li:nth-child(5) { transition-delay: .25s; }
    .nav-menu.open li:nth-child(6) { transition-delay: .3s; }

    .nav-menu .nav-link {
        display: inline-block;
        font-size: 22px;
        font-weight: 600;
        padding: 14px 20px;
        color: var(--slate-800);
    }

    .nav-menu .nav-link::after { display: none; }

    .nav-menu .nav-link.active { color: var(--green-600); }
    .nav-toggle { display: flex; }
}

/* 电脑端确保菜单常显 */
@media (min-width: 992px) {
    .nav-toggle { display: none !important; }
    .nav-menu { display: flex !important; opacity: 1 !important; visibility: visible !important; position: static !important; }
    .nav-menu li { opacity: 1 !important; transform: none !important; }
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    border: none;
    transition: all .3s;
    font-family: inherit;
}

.btn-primary {
    background: var(--green-600);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(34,197,94,.35);
}

.btn-primary:hover {
    background: var(--green-700);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34,197,94,.4);
}

.btn-outline {
    background: transparent;
    color: var(--slate-700);
    border: 2px solid var(--slate-200);
}

.btn-outline:hover {
    border-color: var(--green-400);
    color: var(--green-700);
    background: var(--green-50);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ====== Hero ====== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--green-50) 1px, transparent 1px),
        linear-gradient(90deg, var(--green-50) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(34,197,94,.15), transparent 60%);
    border-radius: 50%;
    filter: blur(40px);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 760px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--green-50);
    border: 1px solid var(--green-200);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--green-700);
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--green-500);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .4; }
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.15;
    color: var(--slate-900);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--green-600), var(--green-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(15px, 2vw, 18px);
    color: var(--slate-500);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 40px;
    border: 2px solid var(--slate-300);
    border-radius: 12px;
    display: flex;
    justify-content: center;
}

.hero-scroll span {
    width: 4px;
    height: 8px;
    background: var(--slate-400);
    border-radius: 2px;
    margin-top: 6px;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(12px); }
}

/* ====== Stats ====== */
.stats-section {
    padding: 60px 0;
    background: var(--green-50);
    border-top: 1px solid var(--green-100);
    border-bottom: 1px solid var(--green-100);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: var(--green-200);
}

.stat-number {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 900;
    color: var(--green-700);
    line-height: 1;
}

.stat-suffix {
    font-size: .6em;
}

.stat-label {
    margin-top: 8px;
    font-size: 14px;
    color: var(--slate-500);
    font-weight: 500;
}

/* ====== Section Header ====== */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--green-600);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    color: var(--slate-900);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 16px;
    color: var(--slate-500);
}

/* ====== Services ====== */
.services-section {
    padding: 100px 0;
    background: #fbfcfb;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    padding: 36px 32px;
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 20px;
    transition: all .3s;
}

.service-card:hover {
    border-color: var(--green-300);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-50);
    border-radius: 16px;
    color: var(--green-600);
    margin-bottom: 24px;
    transition: all .3s;
}

.service-card:hover .service-icon {
    background: var(--green-500);
    color: var(--white);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: var(--slate-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    border-top: 1px solid var(--slate-100);
    padding-top: 16px;
}

.service-features li {
    font-size: 14px;
    color: var(--slate-600);
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green-500);
    font-weight: 700;
}

/* ====== Advantages ====== */
.advantages-section {
    padding: 100px 0;
    background: var(--slate-50);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.advantage-item {
    padding: 32px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--slate-100);
    transition: all .3s;
}

.advantage-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--green-200);
}

.adv-number {
    font-size: 40px;
    font-weight: 900;
    color: var(--green-100);
    line-height: 1;
    margin-bottom: 16px;
}

.advantage-item:hover .adv-number {
    color: var(--green-200);
}

.advantage-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 10px;
}

.advantage-item p {
    font-size: 14px;
    color: var(--slate-500);
    line-height: 1.7;
}

/* ====== Cases ====== */
.cases-section {
    padding: 100px 0;
    background: #fbfcfb;
}

/* 分类筛选标签 */
.case-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 44px;
}

.case-filter {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 4px; /* 老内核无flex gap时的间距兜底 */
    padding: 9px 18px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    color: var(--slate-600);
    background: var(--white);
    border: 1.5px solid var(--slate-200);
    border-radius: 100px;
    cursor: pointer;
    transition: all .25s ease;
}

.case-filter:hover {
    border-color: var(--green-400);
    color: var(--green-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.case-filter.active {
    background: var(--green-600);
    border-color: var(--green-600);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(34,197,94,.35);
}

.filter-count {
    font-size: 12px;
    font-weight: 700;
    padding: 1px 8px;
    border-radius: 100px;
    background: var(--green-100);
    color: var(--green-700);
}

.case-filter.active .filter-count {
    background: rgba(255,255,255,.25);
    color: var(--white);
}

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

.case-card {
    position: relative;
    padding: 28px 26px 24px;
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 18px;
    cursor: pointer;
    transition: transform .28s cubic-bezier(.2,.7,.3,1.2), box-shadow .28s ease, border-color .28s ease, opacity .6s ease;
}

.case-card:hover {
    transform: translateY(-8px) scale(1.015);
    box-shadow: var(--shadow-lg);
    border-color: var(--green-300);
}

.case-card:active {
    transform: translateY(-4px) scale(.995);
}

.case-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.case-icon {
    font-size: 28px;
    line-height: 1;
}

.case-status {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
    white-space: nowrap;
}

.s-run  { background: var(--green-100); color: var(--green-700); }
.s-done { background: #e0f2fe; color: #0369a1; }
.s-dev  { background: #fef3c7; color: #b45309; }
.s-plan { background: var(--slate-100); color: var(--slate-500); }

.case-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 10px;
}

.case-card p {
    font-size: 13.5px;
    color: var(--slate-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

/* 痛点：卡片上的一行，让访客一眼对上自己的处境 */
.case-card p.case-pain {
    font-size: 12.5px;
    color: var(--slate-600);
    line-height: 1.65;
    margin: -10px 0 16px;
    padding: 8px 10px 8px 12px;
    background: #fffaf3;
    border-left: 3px solid #fb923c;
    border-radius: 0 8px 8px 0;
}

.case-card p.case-pain b {
    color: #c2410c;
    font-weight: 700;
    margin-right: 6px;
}

.case-stats {
    display: flex;
    gap: 26px;
    flex-wrap: wrap;
    border-top: 1px solid var(--slate-100);
    padding-top: 16px;
}

.case-stats div {
    display: flex;
    flex-direction: column;
    margin-right: 24px; /* 老内核无flex gap时的间距兜底 */
}

.case-stats strong {
    font-size: 18px;
    font-weight: 800;
    color: var(--green-700);
}

.case-stats span {
    font-size: 11.5px;
    color: var(--slate-400);
    margin-top: 2px;
}

.case-more {
    margin-top: 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--green-600);
    opacity: 0;
    transform: translateX(-6px);
    transition: all .28s ease;
}

.case-card:hover .case-more {
    opacity: 1;
    transform: translateX(0);
}

/* ====== 案例详情弹层（:target纯CSS，兼容旧内核：不使用inset/flex gap）====== */
.case-detail {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 2000;
    padding: 24px;
    overflow-y: auto;
}

.case-detail:target { display: block; }

.case-detail-mask {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,23,42,.6);
}

.case-detail:target .case-detail-mask { display: block; }

.case-detail-card {
    position: relative;
    max-width: 620px;
    margin: 6vh auto 40px;
    background: var(--white);
    border-radius: 22px;
    box-shadow: 0 30px 80px rgba(15,23,42,.3);
    padding: 36px 36px 32px;
}

.case-detail-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--slate-400);
    background: var(--slate-50);
    border-radius: 50%;
    z-index: 2;
}

.case-detail-close:hover { background: var(--green-50); color: var(--green-700); }

.modal-head {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 18px;
    padding-right: 36px;
}

.modal-head .case-icon {
    font-size: 40px;
}

.modal-cat {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--slate-400);
    margin-bottom: 6px;
}

.modal-head h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--slate-900);
    line-height: 1.35;
}

.modal-brief {
    font-size: 14.5px;
    color: var(--slate-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

.modal-stats {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    padding: 18px 22px;
    background: var(--green-50);
    border: 1px solid var(--green-100);
    border-radius: 14px;
    margin-bottom: 24px;
}

.modal-stat {
    display: flex;
    flex-direction: column;
}

.modal-stat strong {
    font-size: 20px;
    font-weight: 800;
    color: var(--green-700);
}

.modal-stat span {
    font-size: 12px;
    color: var(--slate-400);
    margin-top: 2px;
}

.modal-subtitle {
    font-size: 15px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 12px;
}

/* 弹层：客户痛点 / 我们怎么做 两段 */
.modal-block {
    margin-bottom: 22px;
}

.modal-pain {
    font-size: 14px;
    color: var(--slate-700);
    line-height: 1.85;
    background: #fffaf3;
    border-left: 3px solid #fb923c;
    border-radius: 0 8px 8px 0;
    padding: 12px 14px;
}

.modal-how {
    font-size: 14px;
    color: var(--slate-700);
    line-height: 1.85;
    background: var(--green-50);
    border-left: 3px solid var(--green-400);
    border-radius: 0 8px 8px 0;
    padding: 12px 14px;
}

.modal-highlights li {
    position: relative;
    padding: 7px 0 7px 26px;
    font-size: 14px;
    color: var(--slate-600);
    line-height: 1.7;
    border-bottom: 1px dashed var(--slate-100);
}

.modal-highlights li:last-child {
    border-bottom: none;
}

.modal-highlights li::before {
    content: '✓';
    position: absolute;
    left: 2px;
    color: var(--green-500);
    font-weight: 700;
}

@media (max-width: 640px) {
    .case-detail-card { margin: 3vh 14px 24px; padding: 28px 22px 24px; }
    .case-detail { padding: 0; }
    .modal-stats { gap: 18px; }
}

/* ====== About ====== */
.about-section {
    padding: 100px 0;
    background: var(--slate-50);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .section-tag,
.about-text .section-title,
.contact-info .section-tag,
.contact-info .section-title {
    text-align: left;
}

.about-desc {
    font-size: 15px;
    color: var(--slate-600);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-values {
    margin-top: 32px;
}

.value-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 0;
    border-bottom: 1px solid var(--slate-200);
}

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

.value-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-50);
    color: var(--green-600);
    border-radius: 12px;
}

.value-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 4px;
}

.value-item p {
    font-size: 13px;
    color: var(--slate-500);
}

.about-visual {
    display: flex;
    justify-content: center;
}

.about-card {
    width: 100%;
    max-width: 420px;
    background: var(--slate-900);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-card-header {
    padding: 16px;
    display: flex;
    gap: 8px;
    background: var(--slate-800);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.about-card-body {
    padding: 28px 24px;
}

.code-line {
    padding: 10px 0;
    font-size: 14px;
    color: var(--slate-300);
    border-bottom: 1px solid var(--slate-700);
    line-height: 1.7;
}

.code-line:last-child { border-bottom: none; }

.code-key {
    display: inline-block;
    width: 48px;
    color: var(--green-400);
    font-weight: 600;
}

/* ====== Contact ====== */
.contact-section {
    padding: 100px 0;
    background: #fbfcfb;
}

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

.contact-desc {
    font-size: 15px;
    color: var(--slate-500);
    margin-bottom: 32px;
}

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

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

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-50);
    color: var(--green-600);
    border-radius: 12px;
}

.contact-method h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--slate-900);
}

.contact-method p {
    font-size: 14px;
    color: var(--slate-500);
}

.contact-form-wrap {
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    border-radius: 20px;
    padding: 40px;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--slate-900);
    margin-bottom: 6px;
}

.form-subtitle {
    font-size: 14px;
    color: var(--slate-500);
    margin-bottom: 28px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--slate-200);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    color: var(--slate-700);
    background: var(--white);
    transition: border-color .2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--green-400);
}

.form-group textarea {
    resize: vertical;
}

/* ====== Footer ====== */
.footer {
    background: var(--slate-900);
    color: var(--slate-400);
    padding: 60px 0 30px;
}

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

.footer-brand .nav-logo {
    color: var(--white);
    margin-bottom: 12px;
}

.footer-brand .logo-icon {
    color: var(--green-400);
}

.footer-brand p {
    font-size: 14px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--slate-400);
    transition: color .2s;
}

.footer-col ul li a:hover {
    color: var(--green-400);
}

.footer-bottom {
    border-top: 1px solid var(--slate-700);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
}

/* ====== Animations ====== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .6s ease, transform .6s ease;
}

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

/* ====== Responsive ====== */
@media (max-width: 968px) {
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-visual {
        order: -1;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .stat-item:nth-child(2)::after {
        display: none;
    }
}

@media (max-width: 640px) {
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .stat-item::after { display: none !important; }

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

    .contact-form-wrap {
        padding: 28px 20px;
    }

    .service-card,
    .advantage-item,
    .case-card {
        padding: 28px 24px;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .services-section,
    .advantages-section,
    .cases-section,
    .about-section,
    .contact-section {
        padding: 60px 0;
    }
}