/* ============================================
   冲出屏幕效果 - 极简震撼设计
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 85%; /* 整体缩放到85%，平衡大小与紧凑度 */
}

:root {
    --black: #0a0a0a;
    --white: #ffffff;
    --gray: #1a1a1a;
    --accent: #ff3d00;  /* 强烈的橙红色 */
    --spacing-xs: 1.5rem;
    --spacing-md: 3rem;
    --spacing-lg: 6rem;

    /* 响应式字体系统 - 使用clamp实现平滑过渡 */
    /* 格式: clamp(最小值, 首选值, 最大值) */
    --font-hero-title: clamp(4.5rem, 7.5vw, 11rem);   /* 英雄标题：4.5rem-11rem */
    --font-section-title: clamp(3rem, 4.5vw, 5.5rem); /* 章节标题：3rem-5.5rem */
    --font-philosophy-title: clamp(3.2rem, 4.5vw, 5rem); /* 理念标题：3.2rem-5rem */
    --font-subtitle: clamp(1.1rem, 1.4vw, 1.4rem);    /* 副标题：1.1rem-1.4rem */
    --font-body: clamp(1rem, 1.15vw, 1.15rem);        /* 正文：1rem-1.15rem */
    --font-nav: clamp(0.8rem, 0.85vw, 0.9rem);        /* 导航：0.8rem-0.9rem */
    --font-cta: clamp(0.95rem, 1.1vw, 1.05rem);       /* 按钮：0.95rem-1.05rem */
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--black);
    color: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* 3D背景画布 */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* 导航 */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: clamp(0.8rem, 1.5vw, 1.5rem) clamp(1.5rem, 3vw, 3rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(1.2rem, 1.8vw, 1.6rem);
    letter-spacing: 0.2em;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-size: var(--font-nav);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--accent);
}

.nav-link:hover::after {
    width: 100%;
}

/* ============================================
   首屏 - 冲出屏幕效果
   ============================================ */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    perspective: 1000px; /* 3D透视 */
}

.hero-content {
    text-align: center;
    z-index: 10;
    animation: fadeInUp 1.5s ease-out;
}

.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: var(--font-hero-title);
    line-height: 0.9;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
    transform: translateZ(100px); /* 3D向前推进 */
    animation: titleZoomIn 2s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-subtitle {
    font-size: var(--font-subtitle);
    font-weight: 300;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 3rem;
    opacity: 0.8;
}

.hero-cta {
    padding: 1.5rem 4rem;
    font-size: var(--font-cta);
    font-weight: 600;
    background: var(--accent);
    color: var(--white);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    transform: translateZ(50px);
    position: relative;
    overflow: hidden;
}

.hero-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--white);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.hero-cta:hover {
    transform: translateZ(80px) scale(1.1);
    box-shadow: 0 20px 60px rgba(255, 61, 0, 0.5);
}

.hero-cta:hover::before {
    width: 300px;
    height: 300px;
}

/* 冲出屏幕的3D文字 */
.flying-text {
    position: absolute;
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(4rem, 5vw, 6rem);
    color: rgba(255, 255, 255, 0.05);
    letter-spacing: 0.2em;
    pointer-events: none;
    animation: flyTowards 20s linear infinite;
    transform-style: preserve-3d;
}

#flying-text-1 {
    top: 10%;
    left: -200px;
    animation-delay: 0s;
}

#flying-text-2 {
    top: 50%;
    right: -200px;
    animation-delay: 6s;
    animation-direction: reverse;
}

#flying-text-3 {
    bottom: 10%;
    left: -200px;
    animation-delay: 12s;
}

@keyframes flyTowards {
    0% {
        transform: translateX(0) translateZ(-1000px) scale(0.5);
        opacity: 0;
    }
    10% {
        opacity: 0.05;
    }
    90% {
        opacity: 0.05;
    }
    100% {
        transform: translateX(calc(100vw + 400px)) translateZ(500px) scale(2);
        opacity: 0;
    }
}

/* ============================================
   核心理念 - 流式布局 + 动态视觉
   ============================================ */
.section {
    min-height: 40vh;
    padding: clamp(3rem, 5vw, 6rem) clamp(1.5rem, 3vw, 3rem);
    position: relative;
}

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

.section-content {
    max-width: 1400px;
    margin: 0 auto;
    perspective: 2000px;
}

.section-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: var(--font-section-title);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    text-align: center;
    animation: titleZoomIn 1.5s ease-out;
}

/* 核心理念容器 */
.philosophy-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 4vw, 5rem);
    align-items: center;
    min-height: 80vh;
}

/* 左侧：流式文字 */
.philosophy-text {
    padding-right: 2rem;
}

.philosophy-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: var(--font-philosophy-title);
    line-height: 1.1;
    letter-spacing: 0.05em;
    margin-bottom: 3rem;
    color: var(--white);
}

.philosophy-flow {
    font-size: var(--font-body);
    line-height: 2.2;
    color: rgba(255, 255, 255, 0.8);
}

.philosophy-flow p {
    margin-bottom: 2rem;
    text-align: justify;
    hyphens: auto;
    min-height: 2rem; /* 保持布局稳定 */
}

/* 打字机效果样式 */
.typing-text {
    display: inline;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.typing-text:not(:empty)::after {
    content: '▌';
    animation: blink 0.8s infinite;
    color: var(--accent);
    margin-left: 2px;
}

.philosophy-title .typing-text:not(:empty)::after {
    font-size: 0.9em;
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.philosophy-flow strong,
.philosophy-flow strong.typing-text {
    color: var(--accent);
    font-weight: 600;
}

.philosophy-flow em,
.philosophy-flow em.typing-text {
    font-style: normal;
    border-bottom: 2px solid var(--accent);
}

.philosophy-highlight,
.philosophy-highlight .typing-text {
    font-size: clamp(1.15rem, 1.5vw, 1.5rem);
    font-weight: 600;
    color: var(--accent);
    margin-top: 2rem;
    text-align: left;
    display: block;
}

/* 右侧：动态视觉 */
.philosophy-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1.5rem, 2.5vw, 2.5rem);
    perspective: 1000px;
}

.visual-element {
    width: clamp(200px, 24vw, 350px);
    height: clamp(200px, 24vw, 350px);
    position: relative;
    transform-style: preserve-3d;
    /* 移除整体旋转，让每个环独立旋转 */
}

.core-ring {
    position: absolute;
    border: 2px solid var(--accent);
    border-radius: 50%;
    opacity: 0.4;
    transform-style: preserve-3d;
}

.ring-1 {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    animation: ringRotateY 15s linear infinite;
}

.ring-2 {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    animation: ringRotateX 12s linear infinite;
}

.ring-3 {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    animation: ringRotateZ 18s linear infinite;
}

.core-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: clamp(65px, 8vw, 100px);
    height: clamp(65px, 8vw, 100px);
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: coreGlow 2s ease-in-out infinite;
}

.core-text {
    font-size: clamp(2rem, 3vw, 3.5rem);
    color: var(--white);
    font-weight: 300;
}

.visual-keywords {
    display: flex;
    gap: clamp(1rem, 1.5vw, 2rem);
    flex-wrap: wrap;
    justify-content: center;
}

.keyword {
    padding: clamp(0.5rem, 0.8vw, 0.8rem) clamp(1.2rem, 2vw, 2rem);
    border: 1px solid rgba(255, 61, 0, 0.3);
    font-size: clamp(0.75rem, 0.85vw, 0.9rem);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--white);
    opacity: 0.6;
    transition: all 0.4s ease;
    animation: keywordFade 4s ease-in-out infinite;
    animation-delay: calc(var(--delay) * 1s);
}

.keyword:hover {
    opacity: 1;
    border-color: var(--accent);
    background: rgba(255, 61, 0, 0.1);
    transform: translateY(-5px);
}

@keyframes ringRotateY {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(360deg);
    }
}

@keyframes ringRotateX {
    0% {
        transform: rotateX(0deg);
    }
    100% {
        transform: rotateX(360deg);
    }
}

@keyframes ringRotateZ {
    0% {
        transform: rotateZ(0deg) rotateY(45deg);
    }
    100% {
        transform: rotateZ(360deg) rotateY(45deg);
    }
}

@keyframes coreGlow {
    0%, 100% {
        box-shadow: 0 0 40px rgba(255, 61, 0, 0.3);
    }
    50% {
        box-shadow: 0 0 80px rgba(255, 61, 0, 0.6);
    }
}

@keyframes keywordFade {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

/* ============================================
   博客文章 - 不规则3D网格
   ============================================ */
.blog-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: clamp(0.8rem, 1.2vw, 1.5rem);
    perspective: 1500px;
    position: relative;
}

.blog-bg-number {
    position: absolute;
    top: -100px;
    right: -100px;
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(20rem, 30vw, 35rem);
    color: rgba(255, 61, 0, 0.03);
    pointer-events: none;
    z-index: 0;
}

.blog-bg-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, rgba(255, 61, 0, 0.05) 1px, transparent 1px),
        linear-gradient(rgba(255, 61, 0, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.blog-card {
    background: var(--black);
    border: 2px solid rgba(255, 61, 0, 0.2);
    position: relative;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    transform: rotateZ(var(--rotate, 0deg));
    cursor: pointer;
    overflow: hidden;
    z-index: 1;
}

.blog-card-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    text-decoration: none;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 61, 0, 0.1), transparent);
    transition: left 0.8s ease;
}

.blog-card:hover::before {
    left: 100%;
}

.blog-card-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2.5rem, 3.5vw, 4rem);
    color: rgba(255, 61, 0, 0.1);
    line-height: 1;
    z-index: 0;
}

.blog-card-content {
    padding: clamp(1.2rem, 2vw, 2.5rem);
    position: relative;
    z-index: 1;
}

.blog-card-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.blog-date {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.blog-tag {
    padding: 0.3rem 1rem;
    background: rgba(255, 61, 0, 0.1);
    border: 1px solid rgba(255, 61, 0, 0.3);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.blog-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.3;
}

.blog-card p {
    font-size: 1rem;
    opacity: 0.7;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.blog-card-arrow {
    font-size: 2rem;
    color: var(--accent);
    transition: transform 0.4s ease;
}

.blog-card:hover {
    transform: translateZ(80px) scale(1.05);
    border-color: var(--accent);
    box-shadow:
        0 30px 80px rgba(255, 61, 0, 0.3),
        0 0 0 1px rgba(255, 61, 0, 0.5);
    z-index: 10;
}

.blog-card:hover .blog-card-arrow {
    transform: translateX(10px);
}

.blog-card:hover .blog-card-number {
    color: rgba(255, 61, 0, 0.2);
    transform: scale(1.1);
}

/* 大卡片 */
.blog-card-large {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
    min-height: clamp(280px, 35vw, 420px);
}

.blog-card-large h3 {
    font-size: clamp(1.5rem, 2vw, 2.5rem);
}

.blog-card-large .blog-card-number {
    font-size: clamp(4rem, 5vw, 6.5rem);
}

/* 中卡片 */
.blog-card-medium {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
}

/* 小卡片 */
.blog-card-small {
    grid-column: 3 / 4;
}

.blog-card-small:nth-of-type(3) {
    grid-row: 1 / 2;
}

.blog-card-small:nth-of-type(4) {
    grid-row: 2 / 3;
}

/* ============================================
   关于部分
   ============================================ */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro {
    font-size: clamp(1.5rem, 2.5vw, 2.5rem);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.about-text p {
    font-size: clamp(0.95rem, 1.1vw, 1.1rem);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.contact-btn {
    padding: 1.5rem 4rem;
    font-size: var(--font-cta);
    font-weight: 600;
    background: transparent;
    color: var(--white);
    border: 2px solid var(--accent);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    transition: all 0.4s ease;
    margin-top: 2rem;
}

.contact-btn:hover {
    background: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255, 61, 0, 0.4);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    padding: 3rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ============================================
   动画关键帧
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes titleZoomIn {
    0% {
        opacity: 0;
        transform: translateZ(-500px) scale(0.5);
    }
    100% {
        opacity: 1;
        transform: translateZ(100px) scale(1);
    }
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    /* 字体大小已通过clamp()自动响应，无需手动覆盖 */
    
    .philosophy-container {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .philosophy-text {
        padding-right: 0;
        order: 2;
    }
    
    .philosophy-visual {
        order: 1;
    }
    
    .visual-element {
        width: 300px;
        height: 300px;
    }
    
    .blog-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
    }
    
    .blog-card-large {
        grid-column: 1 / 3;
        grid-row: 1 / 2;
    }
    
    .blog-card-medium {
        grid-column: 1 / 2;
        grid-row: 2 / 3;
    }
    
    .blog-card-small:nth-of-type(3) {
        grid-column: 2 / 3;
        grid-row: 2 / 3;
    }
    
    .blog-card-small:nth-of-type(4) {
        grid-column: 1 / 3;
        grid-row: 3 / 4;
    }
}

@media (max-width: 768px) {
    /* 字体大小已通过clamp()自动响应，无需手动覆盖 */
    
    .visual-element {
        width: 250px;
        height: 250px;
    }
    
    .keyword {
        padding: 0.6rem 1.5rem;
        font-size: 0.8rem;
    }
    
    .nav {
        padding: 1.5rem 2rem;
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    .flying-text {
        display: none;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .blog-card-large,
    .blog-card-medium,
    .blog-card-small {
        grid-column: 1;
        min-height: auto;
    }
    
    .blog-card-large h3 {
        font-size: clamp(1.5rem, 2vw, 2rem);
    }
    
    .blog-bg-number {
        font-size: clamp(15rem, 20vw, 20rem);
        top: -50px;
        right: -50px;
    }
    
    .blog-card-content {
        padding: 2rem;
    }
}

/* 减少动效支持 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}