/* =============================================
   deerlongcn.com 个人展示宣传页 · 主题样式
   风格：暗黑科技 + 红紫渐变 + 电光蓝
   ============================================= */

:root {
    --bg: #0d0b1a;
    --bg-2: #161230;
    --card: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text: #e8e6f5;
    --muted: #a6a2c4;
    --grad: linear-gradient(120deg, #ff5e7e 0%, #ff7a5c 30%, #8f5cff 70%, #2fc6ff 100%);
    --primary: #ff5e7e;
    --accent: #2fc6ff;
    --radius: 16px;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

.container {
    width: min(1100px, 90%);
    margin: 0 auto;
}

/* ---------- 渐变文字 ---------- */
.grad {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 0.9em 1.9em;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--grad);
    color: #160f24;
    box-shadow: 0 8px 30px rgba(255, 94, 126, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 40px rgba(255, 94, 126, 0.55);
}

.btn-ghost {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text);
}

.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1.05em 2.4em;
    font-size: 1.05rem;
}

/* 引流按钮脉冲动画 */
.btn-primary.btn-lg {
    animation: pulse 2.2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 94, 126, 0.55); }
    50% { box-shadow: 0 0 0 16px rgba(255, 94, 126, 0); }
}

/* ---------- 导航 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1rem 0;
    transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.navbar.scrolled {
    background: rgba(13, 11, 26, 0.85);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    padding: 0.6rem 0;
}

.nav-inner {
    width: min(1100px, 90%);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.logo span {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--muted);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--text);
}

.nav-cta {
    padding: 0.55em 1.3em;
    font-size: 0.9rem;
    border-color: var(--primary);
    color: var(--primary);
}

.nav-cta:hover {
    background: var(--primary);
    color: #160f24;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.nav-toggle span {
    width: 26px;
    height: 3px;
    border-radius: 2px;
    background: var(--text);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px 400px at 20% 20%, rgba(255, 94, 126, 0.25), transparent 70%),
        radial-gradient(600px 400px at 80% 30%, rgba(143, 92, 255, 0.25), transparent 70%),
        radial-gradient(500px 400px at 60% 90%, rgba(47, 198, 255, 0.2), transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
    max-width: 860px;
    animation: fadeUp 0.8s ease both;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.4rem;
    border-radius: 50%;
    padding: 4px;
    background: var(--grad);
    box-shadow: 0 0 40px rgba(255, 94, 126, 0.35);
    animation: float 5s ease-in-out infinite;
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-2);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-tag {
    display: inline-block;
    color: var(--accent);
    letter-spacing: 1px;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.4rem);
    line-height: 1.25;
    font-weight: 800;
    margin-bottom: 1.2rem;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--muted);
    max-width: 640px;
    margin: 0 auto 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-cta {
    animation: pulse 2.2s infinite;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 2rem;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat span {
    color: var(--muted);
    font-size: 0.9rem;
}

/* ---------- 引流横幅 ---------- */
.cta-banner {
    background: var(--grad);
    padding: 3rem 2.5rem;
    margin: 0 auto 80px;
    width: min(1000px, 90%);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.cta-text {
    flex: 1;
    min-width: 0;
}

.cta-banner h2 {
    color: #160f24;
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin-bottom: 0.6rem;
}

.cta-banner p {
    color: rgba(22, 15, 36, 0.85);
    margin-bottom: 1.6rem;
}

.cta-banner .btn-primary {
    background: #160f24;
    color: #fff;
}

.cta-banner .btn-primary:hover {
    color: #fff;
    background: #2a1d48;
}

/* 引流横幅图片展示（层叠效果） */
.cta-imgs {
    position: relative;
    width: 300px;
    height: 230px;
    flex-shrink: 0;
}

.cta-img {
    position: absolute;
    width: 150px;
    height: 210px;
    border-radius: 12px;
    border: 3px solid #fff;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    object-fit: cover;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cta-img.im1 {
    left: 0;
    top: 0;
    transform: rotate(-8deg);
    z-index: 1;
}

.cta-img.im2 {
    left: 75px;
    top: 5px;
    transform: rotate(2deg);
    z-index: 2;
}

.cta-img.im3 {
    left: 150px;
    top: 10px;
    transform: rotate(8deg);
    z-index: 3;
}

.cta-img:hover {
    transform: rotate(0deg) translateY(-8px);
    z-index: 5;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}

/* ---------- 通用区块 ---------- */
section:not(.hero):not(.cta-banner) {
    padding: 80px 0;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.4rem;
}

.section-sub {
    text-align: center;
    color: var(--muted);
    margin-bottom: 3rem;
}

/* ---------- 关于 / 卡片 ---------- */
.about-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
}

.card-icon {
    font-size: 2.4rem;
    display: inline-block;
    margin-bottom: 1rem;
}

.card h3 {
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--muted);
    font-size: 0.95rem;
}

.about-cta {
    text-align: center;
    margin-top: 3rem;
}

/* ---------- 技能 ---------- */
.skills {
    background: var(--bg-2);
}

.skill-grid {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
}

.skill-name {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    overflow: hidden;
}

.bar i {
    display: block;
    height: 100%;
    background: var(--grad);
    border-radius: 20px;
    width: 0;
    transition: width 1.2s ease;
}

/* ---------- 作品 ---------- */
.work-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
}

.work {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.8rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.work:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow);
}

.work-thumb {
    height: 150px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, var(--t), transparent 70%);
}

.work h3 {
    margin-bottom: 0.4rem;
}

.work p {
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.work-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.work-link:hover {
    text-decoration: underline;
}

/* ---------- 资源 ---------- */
.resources {
    background: var(--bg-2);
}

.res-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
}

.res {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.6rem;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.res:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
}

.res-ico {
    font-size: 2rem;
    display: inline-block;
    margin-bottom: 0.6rem;
}

.res h3 {
    font-size: 1.05rem;
}

.res-cta {
    text-align: center;
    margin-top: 3rem;
}

/* ---------- FAQ ---------- */
.faq {
    background: var(--bg);
}

.faq-list {
    max-width: 780px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary);
}

.faq-q {
    width: 100%;
    background: none;
    border: none;
    padding: 1.1rem 1.4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-align: left;
}

.faq-arrow {
    font-style: normal;
    color: var(--primary);
    font-size: 1.1rem;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-arrow {
    transform: rotate(180deg);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.faq-a p {
    padding: 0 1.4rem 1.2rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.faq-a a {
    color: var(--primary);
    font-weight: 600;
}

.faq-a a:hover {
    text-decoration: underline;
}

/* ---------- 底部 ---------- */
.footer {
    background: #0a0817;
    padding: 80px 0 40px;
}

.footer-cta {
    text-align: center;
    margin-bottom: 3rem;
}

.footer-cta h2 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    margin-bottom: 0.6rem;
}

.footer-cta p {
    color: var(--muted);
    margin-bottom: 2rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.6rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--muted);
    font-size: 0.9rem;
}

.social {
    display: flex;
    gap: 0.8rem;
}

.social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card);
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.social a:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

/* ---------- 回到顶部 ---------- */
.back-top {
    position: fixed;
    right: 24px;
    bottom: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--grad);
    color: #160f24;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    cursor: pointer;
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(255, 94, 126, 0.4);
}

.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    transform: translateY(-4px);
}

/* ---------- 滚动渐显 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
    .about-cards, .work-grid { grid-template-columns: 1fr; }
    .res-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        background: rgba(13, 11, 26, 0.97);
        backdrop-filter: blur(12px);
        transition: right 0.35s ease;
    }

    .nav-links.open { right: 0; }

    .nav-toggle { display: flex; }
    .nav-cta { display: none; }

    .hero { padding-top: 100px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-stats { gap: 2rem; }

    /* 引流横幅移动端：纵向排列 */
    .cta-inner { flex-direction: column; text-align: center; }
    .cta-imgs { margin: 0 auto; }

    section:not(.hero):not(.cta-banner) { padding: 60px 0; }
}

@media (max-width: 480px) {
    .res-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.9rem; }
    /* 小屏缩小引流图片区 */
    .cta-imgs { width: 240px; height: 200px; transform: scale(0.85); }
    .cta-img { width: 120px; height: 170px; }
    .cta-img.im2 { left: 60px; }
    .cta-img.im3 { left: 120px; }
}