/* ========================================
   企鹅互助官网 - 明亮风格
   结构参考趣闲赚官网
   配色：白色/浅灰背景 + 橙色/红色强调
   ======================================== */

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

:root {
    --orange: #FF6B00;
    --orange-light: #FFF3E8;
    --red: #E74C3C;
    --red-light: #FDECEA;
    --dark: #1C1E21;
    --gray: #6B7280;
    --gray-light: #F3F4F6;
    --white: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-lg: 16px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ========== 顶部公告栏 ========== */
.top-notice {
    background: linear-gradient(135deg, var(--orange), var(--red));
    color: #fff;
    font-size: 13px;
    padding: 8px 0;
    text-align: center;
    position: relative;
    z-index: 1001;
}
.notice-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.notice-icon { font-size: 14px; }

/* ========== Header 导航栏 ========== */
.header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}
.logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--orange);
    letter-spacing: -0.5px;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    color: var(--dark);
    border-radius: 8px;
    transition: all 0.2s;
    font-weight: 500;
}
.nav-link:hover, .nav-link.active {
    color: var(--orange);
    background: var(--orange-light);
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.btn-download-header {
    background: var(--orange);
    color: #fff !important;
    padding: 10px 22px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    margin-left: 8px;
}
.btn-download-header:hover {
    background: #E55A00;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255,107,0,0.35);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
}

/* ========== Banner 主视觉区 ========== */
.banner {
    background: linear-gradient(135deg, #FFF8F5 0%, #FFF3E8 40%, #FFF8F0 100%);
    padding: 60px 0 80px;
    position: relative;
    overflow: hidden;
}
.banner::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,107,0,0.08) 0%, transparent 70%);
    border-radius: 50%;
}
.banner::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(231,76,60,0.06) 0%, transparent 70%);
    border-radius: 50%;
}
.banner-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    position: relative;
    z-index: 1;
}
.banner-text { flex: 1; max-width: 560px; }
.banner-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}
.title-orange {
    color: var(--orange);
}
.title-dark {
    color: var(--dark);
}
.banner-subtitle {
    font-size: 17px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 32px;
}
.banner-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}
.btn-banner {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid var(--orange);
}
.btn-android {
    background: var(--orange);
    color: #fff;
}
.btn-android:hover {
    background: #E55A00;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,107,0,0.3);
}
.btn-ios {
    background: #fff;
    color: var(--orange);
}
.btn-ios:hover {
    background: var(--orange-light);
    transform: translateY(-2px);
}
.btn-icon { font-size: 18px; }

/* Banner 数据统计 */
.banner-stats {
    display: flex;
    gap: 48px;
}
.stat-item {}
.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--orange);
    line-height: 1.1;
}
.stat-label {
    font-size: 13px;
    color: var(--gray);
    margin-top: 4px;
}

/* ========== 手机模型（通用） ========== */
.banner-phone {
    flex-shrink: 0;
    position: relative;
}
.phone-frame {
    width: 260px;
    height: 540px;
    background: #fff;
    border-radius: 36px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 0 0 8px #f0f0f0;
    overflow: hidden;
    position: relative;
}
.phone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 22px;
    background: #1a1a1a;
    border-radius: 0 0 14px 14px;
    z-index: 10;
}
.phone-screen {
    width: 100%;
    height: 100%;
    background: #F0F2F5;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* APP界面模拟 */
.app-header {
    background: var(--red);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 16px 12px;
    font-size: 16px;
    font-weight: 600;
}
.app-back, .app-more { font-size: 20px; font-weight: 400; }
.app-title { font-size: 16px; }
.app-balance-banner {
    background: linear-gradient(135deg, var(--orange), var(--red));
    color: #fff;
    text-align: center;
    padding: 12px 16px;
    font-size: 13px;
}
.app-balance-banner strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    margin-top: 2px;
}
.app-task-list {
    flex: 1;
    overflow: hidden;
    padding: 8px;
}
.app-task-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.task-icon {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.task-info { flex: 1; min-width: 0; }
.task-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.task-tags {
    display: flex;
    gap: 4px;
    margin-top: 3px;
    flex-wrap: wrap;
}
.tag {
    font-size: 9px;
    padding: 1px 6px;
    border-radius: 3px;
    background: var(--gray-light);
    color: var(--gray);
}
.tag-fast { background: #E8F8F0; color: #27AE60; }
.tag-hot { background: #FDECEA; color: var(--red); }
.task-count {
    font-size: 9px;
    color: #999;
    margin-top: 2px;
}
.task-price {
    font-size: 16px;
    font-weight: 800;
    color: var(--red);
    flex-shrink: 0;
}

/* 手机装饰元素 */
.phone-deco {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 6px;
    background: #fff;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--dark);
    box-shadow: var(--shadow);
}
.phone-deco-1 {
    bottom: 60px;
    left: -30px;
    background: var(--red);
    color: #fff;
}
.phone-deco-2 {
    top: 40px;
    right: -40px;
    background: var(--orange);
    color: #fff;
}

/* ========== Section 通用标题 ========== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}
.section-title .highlight {
    color: var(--orange);
}
.section-title .highlight-red {
    color: var(--red);
}
.section-desc {
    font-size: 16px;
    color: var(--gray);
}
.section-desc.light { color: rgba(255,255,255,0.85); }

/* ========== 关于企鹅互助 ========== */
.about-section {
    padding: 80px 0;
    background: var(--gray-light);
}
.about-inner {
    display: flex;
    align-items: center;
    gap: 60px;
}
.about-phones {
    flex-shrink: 0;
    position: relative;
    width: 480px;
    height: 440px;
}
.phone-small {
    width: 220px;
    height: 460px;
    position: absolute;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1), 0 0 0 6px #e8e8e8;
}
.phone-small .phone-screen { background: #F8F9FA; }
.about-phones .phone-frame:first-child {
    z-index: 2;
    transform: rotate(-3deg);
    left: 20px;
    top: 0;
}
.about-phones .phone-frame.phone-offset {
    z-index: 1;
    right: 40px;
    top: 30px;
    transform: rotate(4deg);
}
.demo-header {
    background: var(--orange);
    color: #fff;
    text-align: center;
    padding: 24px 12px 10px;
    font-size: 15px;
    font-weight: 700;
}
.demo-header-red { background: var(--red); }
.demo-balance {
    background: linear-gradient(135deg, var(--orange), var(--red));
    color: #fff;
    text-align: center;
    padding: 10px 12px;
    font-size: 12px;
}
.demo-balance strong {
    display: block;
    font-size: 24px;
    font-weight: 800;
}
.demo-tasks { padding: 8px; }
.demo-task {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 8px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 12px;
    color: var(--dark);
}
.demo-task b {
    color: var(--red);
    font-weight: 700;
}
.demo-withdraw {
    margin: 10px;
    padding: 12px;
    background: #fff;
    border-radius: 10px;
    border: 1px solid #e8e8e8;
}
.withdraw-method {
    font-size: 13px;
    font-weight: 600;
    color: var(--dark);
}
.withdraw-amount {
    font-size: 20px;
    font-weight: 800;
    color: var(--orange);
    margin: 4px 0;
}
.withdraw-status {
    font-size: 11px;
    color: #27AE60;
}

.about-text { flex: 1; }
.about-text h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
}
.about-text p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 12px;
}
.about-buttons {
    display: flex;
    gap: 14px;
    margin-top: 24px;
}

/* ========== 三大功能模块 ========== */
.features-section {
    padding: 80px 0;
    background: var(--white);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.feature-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
    color: #fff;
}
.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}
.feature-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
}

/* ========== 平台优势 ========== */
.advantages-section {
    padding: 80px 0;
    background: var(--gray-light);
}
.advantages-inner {
    display: flex;
    align-items: center;
    gap: 60px;
}
.advantages-phone {
    flex-shrink: 0;
}
.phone-large {
    width: 280px;
    height: 580px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1), 0 0 0 8px #e8e8e8;
    transform: rotate(-2deg);
}
.app-quick-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 12px;
    background: #fff;
}
.quick-action {
    text-align: center;
    font-size: 11px;
    color: var(--gray);
    padding: 6px 2px;
}
.quick-action span {
    display: block;
    font-size: 22px;
    margin-bottom: 2px;
}
.advantages-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 18px 20px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.advantage-item:hover {
    box-shadow: var(--shadow);
    border-color: var(--orange);
}
.adv-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--orange-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}
.advantage-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}
.advantage-item p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
}

/* ========== 任务类型 ========== */
.tasks-section {
    padding: 80px 0;
    background: var(--white);
}
.tasks-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.task-type-card {
    padding: 30px 24px;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--border);
    transition: all 0.3s;
    text-align: center;
}
.task-type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.task-type-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin: 0 auto 16px;
    color: #fff;
}
.task-type-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.task-type-card p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
}

/* ========== 邀请赚钱 ========== */
.invite-section {
    padding: 70px 0;
    background: linear-gradient(135deg, var(--orange) 0%, var(--red) 100%);
    position: relative;
    overflow: hidden;
}
.invite-section::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
}
.invite-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
    position: relative;
    z-index: 1;
}
.invite-text { flex: 1; color: #fff; }
.invite-text h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    color: #fff;
}
.invite-text h2 .highlight-red {
    color: #FFE0B2;
}
.invite-text p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 10px;
    color: rgba(255,255,255,0.92);
}
.invite-text strong {
    font-size: 20px;
    color: #FFE0B2;
}
.invite-tip {
    font-size: 15px !important;
    margin-top: 12px !important;
}
.btn-invite {
    display: inline-block;
    margin-top: 20px;
    background: #fff;
    color: var(--orange);
    padding: 14px 40px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 700;
    transition: all 0.3s;
}
.btn-invite:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}
.invite-visual {}
.invite-card {
    background: rgba(255,255,255,0.95);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    min-width: 320px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}
.invite-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.invite-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 14px;
    color: var(--gray);
}
.invite-row b {
    color: var(--orange);
    font-weight: 700;
}
.invite-row.total {
    margin-top: 8px;
    padding-top: 12px;
    border-top: 2px dashed var(--border);
}
.invite-row.total span {
    font-weight: 700;
    color: var(--dark);
    font-size: 15px;
}
.invite-row.total b {
    font-size: 20px;
    color: var(--red);
}

/* ========== 下载区域 ========== */
.download-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1C1E21 0%, #2D2F33 100%);
}
.download-section .section-title { color: #fff; }
.download-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}
.download-card {
    width: 220px;
    text-align: center;
    padding: 36px 24px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
    color: #fff;
}
.download-card:hover {
    background: rgba(255,107,0,0.15);
    border-color: var(--orange);
    transform: translateY(-4px);
}
.download-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.download-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}
.download-card p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
}
.download-btn {
    display: inline-block;
    background: var(--orange);
    color: #fff;
    padding: 10px 28px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}
.download-card:hover .download-btn {
    background: #fff;
    color: var(--orange);
}

/* ========== FAQ ========== */
.faq-section {
    padding: 80px 0;
    background: var(--white);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    transition: color 0.2s;
}
.faq-question:hover { color: var(--orange); }
.faq-toggle {
    font-size: 22px;
    font-weight: 400;
    color: var(--orange);
    transition: transform 0.3s;
}
.faq-item.open .faq-toggle {
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    padding: 0 0;
}
.faq-item.open .faq-answer {
    max-height: 200px;
    padding: 0 0 20px;
}

/* ========== 联系我们 ========== */
.contact-section {
    padding: 80px 0;
    background: var(--gray-light);
}
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}
.contact-card {
    text-align: center;
    padding: 36px 24px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--orange);
}
.contact-icon {
    font-size: 40px;
    margin-bottom: 12px;
}
.contact-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}
.contact-card p {
    font-size: 14px;
    color: var(--orange);
    font-weight: 600;
}

/* ========== Footer ========== */
.footer {
    background: #141517;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand {
    max-width: 300px;
}
.footer-logo {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
}
.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}
.footer-brand p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}
.footer-links {
    display: flex;
    gap: 60px;
}
.footer-col h5 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
}
.footer-col a {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.55);
    padding: 5px 0;
    transition: color 0.2s;
}
.footer-col a:hover { color: var(--orange); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    line-height: 2;
}
.footer-bottom a {
    color: rgba(255,255,255,0.4);
    transition: color 0.2s;
}
.footer-bottom a:hover { color: var(--orange); }

/* ========== 浮动下载按钮 ========== */
.float-download {
    position: fixed;
    right: 24px;
    bottom: 30px;
    z-index: 999;
}
.float-download a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: var(--orange);
    color: #fff;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(255,107,0,0.35);
    transition: all 0.3s;
    animation: pulse 2s infinite;
}
.float-download a:hover {
    background: #E55A00;
    transform: scale(1.05);
}
.float-icon { font-size: 22px; }

@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(255,107,0,0.35); }
    50% { box-shadow: 0 4px 30px rgba(255,107,0,0.6); }
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .banner-title { font-size: 38px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .tasks-grid { grid-template-columns: repeat(2, 1fr); }
    .about-inner { flex-direction: column; }
    .advantages-inner { flex-direction: column; }
    .invite-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        gap: 0;
    }
    .nav-menu.mobile-open { display: flex; }
    .nav-menu .nav-link { padding: 12px 0; border-bottom: 1px solid var(--border); }
    .header-actions {
        display: none;
        position: absolute;
        top: calc(70px + 300px);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }
    .header-actions.mobile-open { display: flex; }
    .mobile-menu-btn { display: flex; }
    .banner { padding: 40px 0 50px; }
    .banner-inner { flex-direction: column; gap: 40px; }
    .banner-title { font-size: 30px; }
    .banner-stats { gap: 24px; }
    .stat-num { font-size: 28px; }
    .features-grid { grid-template-columns: 1fr; }
    .tasks-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; }
    .footer-links { gap: 30px; flex-wrap: wrap; }
    .about-phones { width: 100%; height: 400px; }
    .phone-small { width: 180px; height: 380px; }
    .section-title { font-size: 28px; }
    .invite-text h2 { font-size: 28px; }
    .download-grid { gap: 20px; }
}