/* ================================
   橙通网络 - 美化版样式
   ================================ */

/* 1. 全局变量定义 */
:root {
    --primary-color: #ff6b35;      /* 活力橙 */
    --primary-dark: #e55a2b;       /* 深橙色 */
    --secondary-color: #1a1a2e;    /* 深蓝黑 */
    --accent-color: #00d4aa;       /* 科技青 */
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --light-bg: #f8f9fa;
    --gradient: linear-gradient(135deg, #ff6b35 0%, #ff8e53 100%);
    --shadow: 0 10px 40px rgba(0,0,0,0.1);
    --shadow-hover: 0 20px 60px rgba(255,107,53,0.2);
}

/* 2. 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
}

/* 3. 导航栏美化 */
#header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: fixed;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.mainmenu {
    padding: 15px 0;
}

.logo img {
    height: 50px;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    padding: 10px 20px !important;
    position: relative;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--gradient);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 60%;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

/* 4. Hero 区域 */
#hero-area {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    padding-top: 120px;
    position: relative;
    overflow: hidden;
}

#hero-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    animation: float 20s linear infinite;
}

@keyframes float {
    from { transform: translateY(0); }
    to { transform: translateY(-50px); }
}

#hero-area h5 {
    color: var(--primary-color);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

#hero-area h1 {
    color: var(--white);
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 25px;
    background: linear-gradient(90deg, #fff 0%, #00d4aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#hero-area p {
    color: rgba(255,255,255,0.8);
    font-size: 18px;
    max-width: 500px;
}

.caption-img img {
    max-width: 100%;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* 5. 按钮样式 */
.btn-primary {
    background: var(--gradient);
    border: none;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    color: var(--white);
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(255,107,53,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255,107,53,0.4);
    background: var(--primary-dark);
}

/* 6. 区块标题 */
.sec-heading {
    margin-bottom: 60px;
}

.sec-heading h6 {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;

margin-bottom: 10px;
}

.sec-heading h2 {
color: var(--secondary-color);
font-size: 42px;
font-weight: 700;
margin-bottom: 15px;
}

.sec-heading p {
color: var(--text-light);
font-size: 18px;
max-width: 600px;
margin: 0 auto;
}

/* 7. 产品卡片 */
.feature-single,
.discount-cont,
.question-single {
background: var(--white);
padding: 40px;
border-radius: 20px;
box-shadow: var(--shadow);
transition: all 0.3s ease;
margin-bottom: 30px;
}

.feature-single:hover,
.discount-cont:hover,
.question-single:hover {
transform: translateY(-10px);
box-shadow: var(--shadow-hover);
}

/* 8. 背景区域 */
.bg-gray {
background: var(--light-bg);
}

section {
padding: 100px 0;
}

/* 9. 图片效果 */
.discount-img img,
.caption-img img {
border-radius: 20px;
box-shadow: var(--shadow);
transition: all 0.3s ease;
}

.discount-img img:hover,
.caption-img img:hover {
transform: scale(1.02);
box-shadow: var(--shadow-hover);
}

/* 10. FAQ/联系区域 */
#faq-area {
background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

#faq-area .sec-heading h6,
#faq-area .sec-heading h2,
#faq-area .sec-heading p {
color: var(--white);
}

#faq-area .question-single {
background: rgba(255,255,255,0.1);
backdrop-filter: blur(10px);
border: 1px solid rgba(255,255,255,0.1);
}

#faq-area .question-single h4 {
color: var(--primary-color);
font-weight: 600;
margin-bottom: 15px;
}

#faq-area .question-single p {
color: rgba(255,255,255,0.8);
font-size: 16px;
}

/* 11. 折扣区域 */
#discount-area {
padding: 80px 0;
}

#discount-area h6 {
color: var(--primary-color);
font-size: 16px;
font-weight: 600;
letter-spacing: 2px;
}

#discount-area h2 {
color: var(--secondary-color);
font-size: 38px;
font-weight: 700;
margin: 15px 0;
}

#discount-area p {
color: var(--text-light);
font-size: 16px;
}

/* 12. 页脚 */
#footer {
background: var(--secondary-color);
padding: 30px 0;
}

.footer-btm p {
color: rgba(255,255,255,0.6);
font-size: 14px;
}

.footer-btm a {
color: var(--primary-color);
text-decoration: none;
}

/* 13. 响应式 */
@media (max-width: 768px) {
#hero-area h1 {
font-size: 32px;
}
#hero-area {
    padding-top: 100px;
}
.sec-heading h2 {
    font-size: 28px;
}
section {
    padding: 60px 0;
}
.feature-single,
.discount-cont,
.question-single {
    padding: 25px;
}
}

/* 14. 滚动条美化 */
::-webkit-scrollbar {
width: 10px;
}

::-webkit-scrollbar-track {
background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
background: var(--gradient);
border-radius: 5px;
}

/* 15. 动画 */
.fade-in {
animation: fadeIn 0.8s ease;
}

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