/* ----------------------------------
模板名称: Avrix - 数字机构作品集模板
作者: validtheme
描述: 这是一个现代化的数字机构作品集模板
版本: 1.1 (优化版)
-------------------------------------*/


/* 变量定义 - 使用CSS自定义属性定义颜色、字体等变量，便于统一管理和修改 */
:root {
    /* 字体变量 */
    --font-default: 'Manrope', sans-serif;
    --font-heading: 'Manrope', sans-serif;
    --fontawesome: "Font Awesome 5 Pro";
    
    /* 颜色变量 */
    --black: #000000;
    --dark: #1a1a1a;
    --dark-secondary: #262525;
    --white: #ffffff;
    --color-primary: #5138ee;
    --color-secondary: #02ebad;
    --color-heading: #04000b;
    --color-paragraph: #666666;
    
    /* 效果变量 */
    --box-shadow-primary: -1px 3px 10px 0 rgba(0, 0, 0, 0.6);
    --box-shadow-secondary: 0 10px 30px 0 rgba(44, 130, 237, 0.4);
    --box-shadow-regular: 0 2px 12px 0 #e7e7e7;
    --bg-gray: #f1f3f5;
    --bg-gradient: linear-gradient(45deg, #02ebad 0%, #5a57fb 50%);
    
    /* 过渡动画变量 */
    --transition-primary: all 0.35s ease-in-out;
    --transition-fast: all 0.25s ease-in-out;
}

/* ============================================================== 
     # 浏览器重置与基础样式
=================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body,
html {
    height: 100%;
    scroll-behavior: smooth;
}

/* ============================================================== 
    # 模板默认样式
=================================================================== */
body {
    font-family: var(--font-default, sans-serif);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.8;
    overflow-x: hidden;
    background-color: var(--white);
    color: var(--color-paragraph);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    font-weight: 600;
    line-height: 1.2;
    font-family: var(--font-heading, sans-serif);
    margin-bottom: 15px;
}

h1 { font-size: clamp(2rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.5rem, 3.5vw, 1.75rem); }
h4 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h5 { font-size: clamp(1.125rem, 2.5vw, 1.25rem); }
h6 { font-size: clamp(1rem, 2vw, 1.125rem); }

/* 链接和按钮样式 */
a, .btn, button {
    transition: var(--transition-primary);
    outline: none;
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
}

/* 段落样式 */
p {
    color: var(--color-paragraph);
    margin-bottom: 1.5rem;
    font-weight: 500;
    font-family: var(--font-default, sans-serif);
    text-align: left; /* 明确设置居左对齐 */
}

/* ============================================================== 
    # 辅助类CSS
=================================================================== */
.text-light {
    color: var(--white);
}

.text-light h1,
.text-light h2,
.text-light h3,
.text-light h4,
.text-light h5,
.text-light h6,
.text-light p,
.text-light span,
.text-light a {
    color: var(--white);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================================== 
     # 手风琴式作品集区域样式
=================================================================== */
.accrdion-portfolio-area, 
.accrdion-portfolio-area div {
    height: 80%;
    min-height: 70vh;
}

.accordion-portfolio-lists {
    overflow: hidden;
    margin: 0 auto;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
    transition: var(--transition-primary);
    min-height: auto;
    position: relative;
    height: 100%;
    width: 92%;
}

.accordion-portfolio-lists li {
    cursor: pointer;
    position: relative;
    z-index: 1;
    overflow: hidden;
    margin: 0;
    padding: 1.6rem;
    list-style: none;
    width: 16.66666667%;
    height: inherit;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    transition: var(--transition-fast);
    border-radius: 1.875rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    border: 0.4375rem solid var(--white);
    border-bottom: none;
}

.accordion-portfolio-lists li::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--bg-gradient);
    z-index: -1;
    opacity: 0.75;
    transition: var(--transition-primary);
}

.accordion-portfolio-lists li:nth-child(2)::after {
    background: #fba065;
}

.accordion-portfolio-lists li:nth-child(3)::after {
    background: #bccd7e;
}

.accordion-portfolio-lists li:nth-child(4)::after {
    background: #6a850b;
}

.accordion-portfolio-lists li.out::after {
    opacity: 0;
}

.accordion-portfolio-lists li .accordion-overlay.big-section {
    width: 100%;
}

.accordion-portfolio-lists li.out {
    width: 50%;
}

.accrdion-portfolio-area .accordion-overlay {
    display: inline-block;
    height: auto;
    min-height: auto;
    padding: 1.875rem;
    border-radius: 1.25rem;
    position: relative;
    z-index: 1;
}

.accordion-portfolio-lists li h3 {
    position: absolute;
    left: 50%;
    margin: 0;
    font-weight: 700;
    padding: 0;
    transform: translateX(-50%);
    top: 3.125rem;
    writing-mode: vertical-rl;
    transition: var(--transition-primary);
    font-size: 1.375rem;
}

.accordion-portfolio-lists li.out h3 {
    writing-mode: horizontal-tb;
    left: auto;
    transform: none;
    right: 3.125rem;
    display: none;
    border-radius: 0.625rem;
}

.accordion-portfolio-lists li > span {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-weight: 900;
    font-size: 5rem;
    bottom: -3.125rem;
    -webkit-text-stroke: 1px var(--white);
    color: transparent;
    transition: var(--transition-primary);
}

.accordion-portfolio-lists li.out > span {
    bottom: -12.5rem;
    opacity: 0;
    transition-duration: 0.1s;
}

.accordion-portfolio-lists li::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 30%;
    width: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 1) 0%, transparent 100%);
    z-index: -1;
    transition: var(--transition-primary);
    opacity: 0;
    visibility: hidden;
}

.accordion-portfolio-lists li.out::before {
    height: 80%;
    opacity: 1;
    visibility: visible;
}

.accrdion-portfolio-area .accordion-overlay span {
    display: inline-block;
    border-radius: 1.875rem;
    margin-bottom: 0.625rem;
    text-transform: uppercase;
    font-size: 0.875rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
    padding-left: 7.1875rem;
    transition: var(--transition-primary);
    transform: translateX(6.25rem);
    opacity: 0;
}

.accrdion-portfolio-area .out .accordion-overlay span {
    transform: translateX(0);
    opacity: 1;
    transition-delay: 0.15s;
}

.accrdion-portfolio-area .accordion-overlay span::after {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    height: 1px;
    width: 6.25rem;
    background: var(--white);
}

.accrdion-portfolio-area .accordion-overlay h2 {
    margin: 0;
    font-weight: 900;
    transition: var(--transition-primary);
    transform: translateX(-6.25rem);
    opacity: 0;
}

.accrdion-portfolio-area .out .accordion-overlay h2 {
    transform: translateX(0);
    opacity: 1;
    transition-delay: 0.15s;
}

.accrdion-portfolio-area .accordion-overlay p {
    z-index: 1;
    position: relative;
    color: var(--white);
    margin: 0;
    margin-top: 0.9375rem;
    transition: var(--transition-primary);
    transform: translateX(3.125rem);
    opacity: 0;
}

.accrdion-portfolio-area .out .accordion-overlay p {
    opacity: 0.9;
    transform: translateX(0);
    transition-delay: 0.15s;
}

.accrdion-portfolio-area .accordion-overlay > a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 4.375rem;
    width: 4.375rem;
    background: var(--dark);
    border-radius: 50%;
    margin-top: 1.5625rem;
    opacity: 0;
    transform: translateY(1.5625rem);
    font-size: 1.875rem;
    border: 2px solid var(--white);
    transition: var(--transition-primary);
}

.accrdion-portfolio-area .accordion-overlay a i {
    transform: rotate(-45deg);
    -webkit-text-stroke: 1px var(--white);
    color: transparent;
}

.accrdion-portfolio-area .out .accordion-overlay a {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

/* ============================================================== 
    # 响应式CSS
=================================================================== */

/* 平板设备 (宽度768px-991px) */
@media (max-width: 991px) {
    html {
        height: auto;
    }

    .accordion-portfolio-lists {
        display: block;
        height: auto;
    }

    .accrdion-portfolio-area, 
    .accrdion-portfolio-area div {
        height: auto;
        min-height: auto;
    }

    .accordion-portfolio-lists li {
        width: 100%;
        height: 5.625rem;
        display: block;
        border: none;
        margin-top: 0.9375rem;
        border-radius: 0.625rem;
        padding: 2.1875rem;
    }

    .accordion-portfolio-lists li h3 {
        writing-mode: horizontal-tb;
        padding: 0.9375rem;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        right: 0.9375rem;
        left: 6.25rem;
        text-align: right;
    }

    .accordion-portfolio-lists li > span {
        left: 1.875rem;
        top: 50%;
        transform: translateY(-50%);
        font-size: 3.75rem;
        bottom: auto;
    }

    .accordion-portfolio-lists li.out {
        width: 100%;
        padding-top: 12.5rem;
        height: auto;
    }

    .accordion-portfolio-lists li.out h3 {
        display: none;
    }

    .accrdion-portfolio-area .out .accordion-overlay h2 {
        font-size: 1.5rem;
    }

    .accordion-portfolio-lists li.out::before {
        height: 100%;
    }

    .accordion-portfolio-lists li::after {
        opacity: 0.8;
    }

    .accrdion-portfolio-area .out .accordion-overlay p {
        padding: 0;
    }
}

/* 移动设备 (最大宽度767px) */
@media (max-width: 767px) {
    html {
        height: auto;
    }

    .accrdion-portfolio-area .accordion-overlay span {
        background: var(--bg-gradient);
        padding: 0.25rem 1.25rem;
        margin-bottom: 0.9375rem;
        transform: translateX(0);
        padding-left: 1.25rem;
    }

    .accrdion-portfolio-area .accordion-overlay span::after {
        display: none;
    }

    .accrdion-portfolio-area .accordion-overlay {
        padding: 0;
        text-align: center;
        width: 100%;
    }

    .accrdion-portfolio-area .accordion-overlay h2 {
        transform: translateX(0) !important;
    }
    
    /* 为小屏幕优化字体大小 */
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    /* 优化手风琴项目间距 */
    .accordion-portfolio-lists li {
        margin-top: 0.625rem;
        padding: 1.25rem;
    }
}

/* 减少动画对性能的影响 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --color-heading: #000000;
        --color-paragraph: #333333;
    }
    
    .accordion-portfolio-lists li::after {
        opacity: 0.9;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #ffffff;
        --dark: #2a2a2a;
        --color-heading: #f0f0f0;
        --color-paragraph: #cccccc;
        --bg-gray: #1a1a1a;
    }
}