/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #1d1d1d;
    background-color: #fff;
}

/* 工具类 */
.u-visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.is-offscreen {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* 按钮样式 */
.c-button {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.c-button.v--primary {
    background-color: #592466;
    color: #fff;
    border-color: #592466;
}

.c-button.v--primary:hover {
    background-color: #4a1d55;
    border-color: #4a1d55;
}

.c-button.v--secondary {
    background-color: #fff;
    color: #592466;
    border-color: #592466;
}

.c-button.v--secondary:hover {
    background-color: #f9f5fa;
}

.c-button.v--secondary.v--no-border {
    border-color: transparent;
}

.c-button.v--secondary.v--no-border:hover {
    background-color: rgba(89, 36, 102, 0.1);
}

.c-button.v--left {
    text-align: left;
}

/* 导航栏样式 */
.c-nav.c-nav--primary--expanded.t-dark-bg {
    background-color: #1d1c1d;
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.c-nav__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.c-slacklogo a {
    display: block;
}

.c-slacklogo--white {
    display: block;
}

.c-slacklogo--color {
    display: none;
}

.c-nav__list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.c-extnav-level__0 {
    display: flex;
    list-style: none;
    gap: 24px;
}

.c-extnav-level__0 a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.2s ease;
}

.c-extnav-level__0 a:hover {
    color: #e0e0e0;
}

.c-nav--signed-out {
    display: flex;
    align-items: center;
    gap: 16px;
}

.c-nav--signed-out__link {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}

.c-button__nav-primary-tablet {
    display: none;
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

/* 英雄区域 */
.page-downloads__hero {
    background: linear-gradient(135deg, #4a1d55 0%, #592466 100%);
    color: #fff;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.o-content-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.o-two-columns.v--centered {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.o-hero__header__headline {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.o-hero__header__copy {
    font-size: 20px;
    line-height: 1.5;
    margin-bottom: 32px;
}

.o-hero__header__cta {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.page-downloads-undercta-links {
    font-size: 16px;
    opacity: 0.9;
}

.page-downloads-undercta-links a {
    color: #fff;
    text-decoration: underline;
}

.page-downloads__hero__column-image {
    position: relative;
}

.o-hero__illustration {
    position: relative;
    z-index: 2;
}

.o-hero__illustration img {
    
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.page-downloads__hero__blob-one,
.page-downloads__hero__blob-two {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    z-index: 1;
}

.page-downloads__hero__blob-one {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
}

.page-downloads__hero__blob-two {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
}

.page-downloads__hero__meta-text {
    margin-top: 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.page-downloads__hero__meta-text a {
    color: #fff;
    text-decoration: none;
}

.page-downloads__hero__meta-text a:hover {
    text-decoration: underline;
}

/* 移动应用区域 */
.page-downloads__mobile-apps {
    padding: 100px 0;
    background-color: #f9f5fa;
}

.o-two-columns.v--tablet {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.page-downloads__mobile-apps__text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: #1d1c1d;
}

.page-downloads__mobile-apps__text p {
    font-size: 18px;
    line-height: 1.6;
    color: #4a4a4a;
}

.page-downloads__mobile-apps__text a {
    color: #592466;
    text-decoration: none;
    font-weight: 500;
}

.page-downloads__mobile-apps__text a:hover {
    text-decoration: underline;
}

.page-downloads__mobile-apps__image-section {
    position: relative;
}

.page-downloads__mobile-apps__image-section__image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.page-downloads__mobile-apps__background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: linear-gradient(135deg, #e8d4ed 0%, #f5eaf8 100%);
    border-radius: 24px;
    z-index: -1;
}

/* 页脚CTA */
.c-cta--signup.t-dark-theme {
    background-color: #1d1c1d;
    color: #fff;
    text-align: center;
    padding: 80px 0;
}

.c-type-headline-primary {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 32px;
}

.u-text--reverse {
    color: #fff;
}

/* 页脚 */
.c-nav--expanded-footer {
    padding: 60px 0 40px;
    background-color: #fff;
    border-top: 1px solid #e0e0e0;
}

.c-nav__social_list {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 24px;
    margin-bottom: 40px;
}

.c-nav__social_list a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #f5f5f5;
    color: #1d1c1d;
    text-decoration: none;
    transition: all 0.2s ease;
}

.c-nav__social_list a:hover {
    background-color: #592466;
    color: #fff;
}

.c-nav__social_list i {
    font-size: 18px;
}

.c-nav--expanded-footer__submenu {
    text-align: center;
}

.c-nav__legal-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

.c-slackhash.mobile img {
    height: 24px;
    width: auto;
}

.download-slack-link {
    color: #592466;
    text-decoration: none;
    font-weight: 600;
}

.download-slack-link:hover {
    text-decoration: underline;
}

.c-nav__legal_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    gap: 16px;
}

.c-nav__legal_list a {
    color: #4a4a4a;
    text-decoration: none;
    font-size: 14px;
}

.c-nav__legal_list a:hover {
    color: #592466;
    text-decoration: underline;
}

.c-nav__legal-text {
    display: block;
    text-align: center;
    font-size: 12px;
    color: #8a8a8a;
    margin-top: 24px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .o-two-columns.v--centered,
    .o-two-columns.v--tablet {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .o-hero__header__headline {
        font-size: 40px;
    }
    
    .page-downloads__hero {
        padding: 100px 0 60px;
    }
    
    .page-downloads__mobile-apps {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .c-nav__list {
        display: none;
    }
    
    .c-button__nav-primary-tablet {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    
    .c-nav__row {
        padding: 12px 16px;
    }
    
    main {
        margin-top: 70px;
    }
    
    .o-hero__header__headline {
        font-size: 32px;
    }
    
    .o-hero__header__copy {
        font-size: 18px;
    }
    
    .o-hero__header__cta {
        flex-direction: column;
    }
    
    .c-button {
        width: 100%;
        text-align: center;
    }
    
    .c-type-headline-primary {
        font-size: 28px;
    }
    
    .c-nav__legal-links {
        flex-direction: column;
        gap: 16px;
    }
    
    .c-nav__legal_list {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .o-content-container {
        padding: 0 16px;
    }
    
    .o-hero__header__headline {
        font-size: 28px;
    }
    
    .page-downloads__hero {
        padding: 80px 0 40px;
    }
    
    .page-downloads__mobile-apps {
        padding: 60px 0;
    }
    
    .page-downloads__mobile-apps__text h2 {
        font-size: 28px;
    }
}