/**
 * Frontend Styles for Keyword Pages - Commercial Style
 * Inspired by professional B2B product pages
 * 
 * @package Keyword_Page_Generator
 */

/* ==========================================================================
   Mobile-First Base Styles
   ========================================================================== */

html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ==========================================================================
   CSS Variables for Easy Customization
   ========================================================================== */

:root {
    --kpg-primary-color: #0066cc;
    --kpg-primary-dark: #004c99;
    --kpg-secondary-color: #ff6b35;
    --kpg-text-primary: #2c3e50;
    --kpg-text-secondary: #5a6c7d;
    --kpg-text-light: #8492a6;
    --kpg-bg-light: #f8f9fa;
    --kpg-bg-white: #ffffff;
    --kpg-border-color: #e1e8ed;
    --kpg-shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --kpg-shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --kpg-shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --kpg-radius-sm: 4px;
    --kpg-radius-md: 8px;
    --kpg-radius-lg: 12px;
    --kpg-transition: all 0.3s ease;
}

/* ==========================================================================
   Container & Layout
   ========================================================================== */

/* Ensure all elements are mobile-friendly */
* {
    box-sizing: border-box;
}

/* Global text wrapping for mobile */
.kpg-page-wrapper,
.kpg-container,
.kpg-block,
.kpg-faq-list,
.kpg-faq-item {
    max-width: 100%;
    overflow-x: hidden;
}

/* 让关键词页面融入主题整体背景，只负责内部排版 */
.kpg-page-wrapper {
    background: transparent;
    min-height: 0;
    width: 100%;
    overflow-x: hidden;
}

.kpg-container {
    max-width: 1200px;
    margin: 40px auto 60px;
    padding: 0 20px 40px;
    background: var(--kpg-bg-white);
    box-sizing: border-box;
    /* 去掉整体容器阴影，避免页面两侧出现竖向阴影线 */
    box-shadow: none;
    border-radius: 12px;
}

/* ==========================================================================
   Page Header with Banner Style
   ========================================================================== */

.kpg-page-header {
    background: linear-gradient(135deg, var(--kpg-primary-color) 0%, var(--kpg-primary-dark) 100%);
    color: #ffffff;
    padding: 60px 0;
    margin: 0 -20px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    /* 不使用负margin向上，保持在导航栏下方 */
}

.kpg-page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)" /></svg>');
    opacity: 0.3;
}

.kpg-page-title {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    margin: 0;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

/* 面包屑对齐主题文章页风格，简洁小号文字 */
.kpg-breadcrumb {
    background: transparent;
    margin: 0 0 10px 0;
    padding: 10px 0 0;
    border: none;
    font-size: 0.9rem;
}

.kpg-breadcrumb a {
    color: var(--kpg-text-secondary);
    text-decoration: none;
    transition: var(--kpg-transition);
}

.kpg-breadcrumb a:hover {
    color: var(--kpg-primary-color);
    text-decoration: underline;
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */

.kpg-table-of-contents {
    background: var(--kpg-bg-white);
    border: 2px solid var(--kpg-border-color);
    border-radius: var(--kpg-radius-md);
    padding: 25px;
    margin: 0 0 40px 0;
    box-shadow: var(--kpg-shadow-sm);
}

.kpg-toc-header {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--kpg-text-primary);
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--kpg-primary-color);
}

.kpg-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc-counter;
}

.kpg-toc-list li {
    margin: 10px 0;
    counter-increment: toc-counter;
}

.kpg-toc-list li::before {
    content: counter(toc-counter) ". ";
    color: var(--kpg-primary-color);
    font-weight: 600;
    margin-right: 8px;
}

.kpg-toc-list a {
    color: var(--kpg-text-secondary);
    text-decoration: none;
    transition: var(--kpg-transition);
    font-weight: 500;
}

.kpg-toc-list a:hover {
    color: var(--kpg-primary-color);
    padding-left: 5px;
}

/* ==========================================================================
   Content Blocks Base
   ========================================================================== */

.kpg-content-blocks {
    display: flex;
    flex-direction: column;
    gap: 0;
    box-shadow: none;
    border-radius: 0;
    overflow: visible;
    background: var(--kpg-bg-white);
}

.kpg-block {
    background: var(--kpg-bg-white);
    border-radius: 0;
    padding: 40px 40px;
    box-shadow: none;
    transition: var(--kpg-transition);
    border-top: 1px solid var(--kpg-border-color);
    margin: 0;
}

.kpg-block:first-of-type {
    border-top: none;
}

.kpg-block:hover {
    box-shadow: none;
}


.kpg-block-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--kpg-text-primary);
    margin: 0 0 15px 0;
    padding-bottom: 20px;
    border-bottom: none;
    position: relative;
    text-align: center;
}

.kpg-block-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--kpg-secondary-color);
}

.kpg-block-description {
    color: var(--kpg-text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 25px 0 35px;
    text-align: center;
}

/* ==========================================================================
   Introduction Hero Block - Image + Text Side by Side
   ========================================================================== */

.kpg-block-introduction-hero {
    background: var(--kpg-bg-white);
    padding: 40px 40px 40px;
    box-shadow: none;
    border-radius: 0;
    margin: 0;
    border: none;
}

.kpg-introduction-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.kpg-introduction-image {
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.kpg-introduction-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--kpg-radius-lg);
    box-shadow: var(--kpg-shadow-lg);
}

.kpg-introduction-content {
    padding: 20px 0;
}

.kpg-introduction-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--kpg-text-primary);
    line-height: 1.2;
    margin: 0 0 30px 0;
}

.kpg-introduction-description {
    font-size: 1.15rem;
    line-height: 1.9;
    color: var(--kpg-text-secondary);
    margin-bottom: 40px;
}

.kpg-introduction-description p {
    margin-bottom: 1.2em;
}

.kpg-introduction-action {
    margin-top: 35px;
}

.kpg-introduction-button {
    display: inline-block;
    padding: 18px 50px;
    background: #000000;
    color: #ffffff;
    font-size: 1.15rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--kpg-radius-sm);
    transition: var(--kpg-transition);
    box-shadow: var(--kpg-shadow-md);
}

.kpg-introduction-button:hover {
    background: #111111;
    transform: translateY(-3px);
    box-shadow: var(--kpg-shadow-lg);
    color: #ffffff;
}

/* Old Introduction Block Style (Keep for backward compatibility) */
.kpg-block-introduction {
    background: linear-gradient(135deg, var(--kpg-primary-color) 0%, var(--kpg-primary-dark) 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.kpg-block-introduction::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.kpg-block-introduction .kpg-block-title {
    color: #ffffff;
    border-bottom-color: rgba(255, 255, 255, 0.3);
}

.kpg-block-introduction .kpg-block-title::after {
    background: var(--kpg-secondary-color);
}

.kpg-block-introduction .kpg-introduction-content {
    font-size: 1.15rem;
    line-height: 1.9;
    position: relative;
    z-index: 1;
}

.kpg-block-introduction .kpg-introduction-content p {
    margin-bottom: 1.2em;
}

/* ==========================================================================
   Advantages Block - Card Grid
   ========================================================================== */

.kpg-advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 35px;
}

.kpg-advantage-item {
    background: var(--kpg-bg-white);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid #e8e8e8;
    transition: var(--kpg-transition);
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.kpg-advantage-item:hover {
    border: 1px solid var(--kpg-primary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.kpg-advantage-icon {
    display: none;
}

.kpg-advantage-icon svg {
    width: 35px;
    height: 35px;
}

.kpg-advantage-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--kpg-text-primary);
    margin: 0 0 15px 0;
}

.kpg-advantage-description {
    color: var(--kpg-text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* ==========================================================================
   Products Block - Grid Layout
   ========================================================================== */

.kpg-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 35px;
}

.kpg-product-item {
    background: var(--kpg-bg-white);
    border: 1px solid var(--kpg-border-color);
    border-radius: var(--kpg-radius-md);
    overflow: hidden;
    transition: var(--kpg-transition);
    box-shadow: var(--kpg-shadow-sm);
}

.kpg-product-item:hover {
    box-shadow: var(--kpg-shadow-lg);
    transform: translateY(-8px);
    border-color: var(--kpg-primary-color);
}

.kpg-product-thumbnail {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--kpg-bg-light);
    position: relative;
}

.kpg-product-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.3) 100%);
    opacity: 0;
    transition: var(--kpg-transition);
}

.kpg-product-item:hover .kpg-product-thumbnail::after {
    opacity: 1;
}

.kpg-product-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--kpg-transition);
}

.kpg-product-item:hover .kpg-product-thumbnail img {
    transform: scale(1.1);
}

.kpg-product-content {
    padding: 25px;
}

.kpg-product-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 12px 0;
}

.kpg-product-title a {
    color: var(--kpg-text-primary);
    text-decoration: none;
    transition: var(--kpg-transition);
}

.kpg-product-title a:hover {
    color: var(--kpg-primary-color);
}

.kpg-product-excerpt {
    color: var(--kpg-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   Video Block
   ========================================================================== */

.kpg-video-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 0;
}

.kpg-video-item-wrapper {
    background: transparent;
    border-radius: 0;
    overflow: hidden;
    box-shadow: none;
    border: none;
}

.kpg-video-item-title {
    display: none;
}

.kpg-video-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.kpg-video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ==========================================================================
   Text Content Block
   ========================================================================== */

.kpg-text-content {
    font-size: 1.08rem;
    line-height: 1.9;
    color: var(--kpg-text-secondary);
}

.kpg-text-content p {
    margin-bottom: 1.5em;
}

.kpg-text-content h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--kpg-text-primary);
    margin: 2.5em 0 1em 0;
    padding-left: 15px;
    border-left: 4px solid var(--kpg-primary-color);
}

.kpg-text-content ul,
.kpg-text-content ol {
    margin: 1.5em 0;
    padding-left: 2.5em;
}

.kpg-text-content li {
    margin-bottom: 0.8em;
    line-height: 1.7;
}

.kpg-text-content img {
    max-width: 100%;
    height: auto;
    margin: 1.5em 0;
    border-radius: 8px;
}

.kpg-text-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.95rem;
}

.kpg-text-content table th,
.kpg-text-content table td {
    padding: 12px 15px;
    text-align: left;
    border: 1px solid var(--kpg-border-color);
}

.kpg-text-content table th {
    background: var(--kpg-bg-light);
    font-weight: 700;
    color: var(--kpg-text-primary);
}

.kpg-text-content table tr:nth-child(even) {
    background: var(--kpg-bg-light);
}

/* ==========================================================================
   FAQ Block - Accordion Style
   ========================================================================== */

.kpg-faq-list {
    margin-top: 35px;
}

.kpg-faq-item {
    background: #f9f9f9;
    border: none;
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: 8px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: var(--kpg-transition);
    overflow: visible;
    width: 100%;
    box-sizing: border-box;
    display: block;
    position: relative;
    clear: both;
}

.kpg-faq-item.active {
    overflow: visible;
}

.kpg-faq-item:last-child {
    margin-bottom: 0;
}

.kpg-faq-question-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    cursor: pointer;
    position: relative;
    z-index: 1;
    background: #f9f9f9;
    transition: background-color 0.2s ease;
    width: 100%;
    box-sizing: border-box;
    gap: 10px;
}

.kpg-faq-item:hover .kpg-faq-question-wrapper {
    background: #f5f5f5;
}

.kpg-faq-question {
    font-size: 1rem;
    font-weight: 700;
    color: #000;
    margin: 0;
    padding: 0;
    cursor: pointer;
    pointer-events: auto;
    flex: 1;
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    min-width: 0; /* Allow flex item to shrink below content size */
}

.kpg-faq-toggle {
    font-size: 1.5rem;
    font-weight: 700;
    color: #000;
    line-height: 1;
    flex-shrink: 0;
    cursor: pointer;
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    padding: 5px;
    min-width: 30px;
    min-height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 15px;
    transition: all 0.3s ease;
    width: 30px;
    text-align: center;
}

.kpg-faq-answer {
    color: #555;
    line-height: 1.8;
    padding: 0 !important;
    max-height: 0 !important;
    overflow: hidden !important;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: #ffffff;
    width: 100%;
    box-sizing: border-box;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
    display: block;
    position: relative;
    clear: both;
    opacity: 0;
    visibility: hidden;
}

.kpg-faq-item.active .kpg-faq-answer {
    padding: 20px !important;
    max-height: 5000px !important;
    display: block;
    overflow: visible;
    opacity: 1;
    visibility: visible;
}

.kpg-faq-answer p {
    margin: 0 0 12px 0;
    padding: 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
    display: block;
    line-height: 1.8;
    position: relative;
    clear: both;
}

.kpg-faq-answer p:last-child {
    margin-bottom: 0;
}

.kpg-faq-answer * {
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
    display: block;
    position: relative;
}

.kpg-faq-answer strong,
.kpg-faq-answer b {
    display: inline;
    font-weight: 700;
}

.kpg-faq-answer em,
.kpg-faq-answer i {
    display: inline;
    font-style: italic;
}

.kpg-faq-answer span {
    display: inline;
}

.kpg-faq-answer ul,
.kpg-faq-answer ol {
    display: block;
    margin: 12px 0;
    padding-left: 20px;
}

.kpg-faq-answer li {
    display: list-item;
    margin: 6px 0;
    line-height: 1.8;
}

/* ==========================================================================
   Blog Block
   ========================================================================== */

.kpg-blogs-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 35px;
}

.kpg-blog-item {
    background: var(--kpg-bg-white);
    border: 1px solid var(--kpg-border-color);
    border-radius: var(--kpg-radius-md);
    overflow: hidden;
    transition: var(--kpg-transition);
    box-shadow: var(--kpg-shadow-sm);
}

.kpg-blog-item:hover {
    box-shadow: var(--kpg-shadow-lg);
    transform: translateY(-5px);
}

.kpg-blog-thumbnail {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--kpg-bg-light);
    position: relative;
}

.kpg-blog-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--kpg-transition);
}

.kpg-blog-item:hover .kpg-blog-thumbnail img {
    transform: scale(1.08);
}

.kpg-blog-content {
    padding: 25px;
}

.kpg-blog-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 15px 0;
    line-height: 1.4;
}

.kpg-blog-title a {
    color: var(--kpg-text-primary);
    text-decoration: none;
    transition: var(--kpg-transition);
}

.kpg-blog-title a:hover {
    color: var(--kpg-primary-color);
}

.kpg-blog-description,
.kpg-blog-excerpt {
    color: var(--kpg-text-secondary);
    line-height: 1.7;
    font-size: 0.98rem;
}

/* ==========================================================================
   Reviews Block - Customer Testimonials
   ========================================================================== */

.kpg-reviews-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 35px;
}

.kpg-review-item {
    background: var(--kpg-bg-white);
    border-radius: var(--kpg-radius-md);
    padding: 35px;
    border: 2px solid var(--kpg-border-color);
    position: relative;
    box-shadow: var(--kpg-shadow-sm);
    transition: var(--kpg-transition);
}

.kpg-review-item:hover {
    border-color: var(--kpg-primary-color);
    box-shadow: var(--kpg-shadow-md);
}

.kpg-review-item::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 25px;
    font-size: 5rem;
    color: var(--kpg-border-color);
    font-family: Georgia, serif;
    line-height: 1;
    opacity: 0.5;
}

.kpg-review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.kpg-review-name-wrapper {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.kpg-review-name {
    font-weight: 700;
    color: var(--kpg-text-primary);
    font-size: 1.15rem;
}

.kpg-review-description {
    font-size: 0.9rem;
    color: var(--kpg-text-secondary);
    font-weight: 400;
}

.kpg-review-rating {
    display: flex;
    gap: 4px;
}

.kpg-star {
    color: #d1d5db;
    font-size: 1.25rem;
}

.kpg-star.filled {
    color: #fbbf24;
}

.kpg-review-content {
    color: var(--kpg-text-secondary);
    line-height: 1.8;
    position: relative;
    z-index: 1;
    font-size: 1.05rem;
}

/* ==========================================================================
   Keywords Block - Tag Cloud
   ========================================================================== */

.kpg-keywords-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 35px;
}

.kpg-keyword-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--kpg-primary-color) 0%, var(--kpg-primary-dark) 100%);
    color: #ffffff;
    padding: 12px 22px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--kpg-transition);
    box-shadow: var(--kpg-shadow-sm);
}

.kpg-keyword-tag:hover {
    transform: translateY(-3px);
    box-shadow: var(--kpg-shadow-md);
    background: linear-gradient(135deg, var(--kpg-primary-dark) 0%, var(--kpg-primary-color) 100%);
}

.kpg-keyword-tag svg {
    flex-shrink: 0;
}

/* Keyword link styles */
.kpg-keyword-link {
    text-decoration: none;
    color: #ffffff;
    cursor: pointer;
}

.kpg-keyword-link:hover {
    color: #ffffff;
    text-decoration: none;
}

.kpg-keyword-link:visited {
    color: #ffffff;
}

/* ==========================================================================
   Inquiry Form Block
   ========================================================================== */

/* 询盘表单块：在专题页里外观尽量与主题 /quote 页统一 */
.kpg-block-inquiry {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
}

.kpg-block-inquiry .kpg-block-title {
    /* 让标题居中，更接近 /quote 页 */
    text-align: center;
    margin-bottom: 24px;
}

.kpg-inquiry-form-wrapper {
    margin-top: 0;
}

/* 让内部表单容器宽度和 /quote 页保持一致 */
.kpg-inquiry-form-wrapper .quote-form-page {
    max-width: 800px;
    margin: 0 auto;
}

.kpg-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

.kpg-form-field {
    display: flex;
    flex-direction: column;
}

.kpg-form-field label {
    font-weight: 700;
    color: var(--kpg-text-primary);
    margin-bottom: 10px;
    font-size: 1rem;
}

.kpg-form-field input[type="text"],
.kpg-form-field input[type="email"],
.kpg-form-field input[type="tel"],
.kpg-form-field textarea {
    padding: 14px 18px;
    border: 2px solid var(--kpg-border-color);
    border-radius: var(--kpg-radius-sm);
    font-size: 1rem;
    transition: var(--kpg-transition);
    font-family: inherit;
}

.kpg-form-field input:focus,
.kpg-form-field textarea:focus {
    outline: none;
    border-color: var(--kpg-primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.kpg-form-submit {
    background: linear-gradient(135deg, var(--kpg-primary-color) 0%, var(--kpg-primary-dark) 100%);
    color: #ffffff;
    padding: 16px 50px;
    border: none;
    border-radius: var(--kpg-radius-sm);
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--kpg-transition);
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 35px auto 0;
    box-shadow: var(--kpg-shadow-md);
}

.kpg-form-submit:hover {
    transform: translateY(-3px);
    box-shadow: var(--kpg-shadow-lg);
}

.kpg-form-notice {
    text-align: center;
    padding: 25px;
    background: #fef3c7;
    border: 2px solid #fbbf24;
    border-radius: var(--kpg-radius-md);
    color: #92400e;
    font-weight: 600;
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.kpg-back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 55px;
    height: 55px;
    background: var(--kpg-primary-color);
    color: #ffffff;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--kpg-shadow-lg);
    transition: var(--kpg-transition);
    z-index: 999;
    text-decoration: none;
    border: 3px solid var(--kpg-bg-white);
}

.kpg-back-to-top:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,102,204,0.4);
    background: var(--kpg-primary-dark);
}

.kpg-back-to-top svg {
    width: 26px;
    height: 26px;
}

/* ==========================================================================
   No Content Message
   ========================================================================== */

.kpg-no-content {
    text-align: center;
    padding: 80px 40px;
    background: var(--kpg-bg-white);
    border-radius: var(--kpg-radius-lg);
    box-shadow: var(--kpg-shadow-md);
}

.kpg-no-content p {
    font-size: 1.2rem;
    color: var(--kpg-text-light);
    margin: 0;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 992px) {
    .kpg-page-title {
        font-size: 2.5rem;
    }
    
    .kpg-block-title {
        font-size: 1.9rem;
    }
    
    .kpg-advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .kpg-products-grid,
    .kpg-blogs-list,
    .kpg-reviews-list {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 992px) {
    .kpg-introduction-container {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 0;
    }
    
    .kpg-introduction-title {
        font-size: 2.2rem;
    }
    
    .kpg-blogs-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .kpg-block-introduction-hero {
        padding: 30px;
    }
}

@media (max-width: 768px) {
    .kpg-container {
        padding: 60px 15px 40px;
    }
    
    .kpg-page-header {
        padding: 40px 20px;
        margin: 0 -15px 30px;
    }
    
    .kpg-page-title {
        font-size: 2rem;
        line-height: 1.3;
    }
    
    .kpg-introduction-container {
        padding: 0;
        grid-template-columns: 1fr !important;
    }
    
    .kpg-introduction-title {
        font-size: 1.8rem;
        line-height: 1.4;
    }
    
    .kpg-introduction-description {
        font-size: 0.95rem;
        line-height: 1.7;
    }
    
    .kpg-introduction-image {
        min-height: 250px;
        width: 100%;
        max-width: 100%;
    }
    
    .kpg-introduction-image img {
        width: 100%;
        height: auto;
        object-fit: cover;
    }
    
    .kpg-block-introduction-hero {
        padding: 20px 15px;
    }
    
    .kpg-breadcrumb {
        margin: 0 0 15px 0;
        padding: 10px 0;
        font-size: 0.9rem;
    }
    
    .kpg-block {
        padding: 25px 15px;
    }
    
    .kpg-block-title {
        font-size: 1.6rem;
        line-height: 1.4;
        margin-bottom: 20px;
    }
    
    .kpg-advantages-grid,
    .kpg-products-grid,
    .kpg-blogs-list,
    .kpg-reviews-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .kpg-video-content {
        grid-template-columns: 1fr;
    }
    
    .kpg-video-item iframe {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 9;
        min-height: 200px;
    }
    
    .kpg-form-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .kpg-faq-item {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }
    
    .kpg-faq-question-wrapper {
        padding: 15px;
        font-size: 0.95rem;
        flex-wrap: nowrap;
        width: 100%;
        box-sizing: border-box;
    }
    
    .kpg-faq-question {
        font-size: 0.9rem;
        padding-right: 10px;
        flex: 1;
        min-width: 0;
        word-wrap: break-word;
        overflow-wrap: break-word;
        word-break: break-word;
    }
    
    .kpg-faq-answer {
        font-size: 0.9rem;
        line-height: 1.7;
        padding: 0 !important;
        max-height: 0 !important;
        overflow: hidden !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
        word-break: break-word;
        width: 100%;
        box-sizing: border-box;
        display: block;
        position: relative;
        clear: both;
        opacity: 0 !important;
        visibility: hidden !important;
    }
    
    .kpg-faq-item.active .kpg-faq-answer {
        padding: 15px !important;
        max-height: 5000px !important;
        box-sizing: border-box;
        display: block;
        overflow: visible;
        opacity: 1 !important;
        visibility: visible !important;
    }
    
    .kpg-faq-answer p {
        margin: 0 0 12px 0 !important;
        padding: 0 !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
        max-width: 100% !important;
        display: block !important;
        line-height: 1.7 !important;
        position: relative !important;
        clear: both !important;
    }
    
    .kpg-faq-answer p:last-child {
        margin-bottom: 0 !important;
    }
    
    .kpg-faq-answer div {
        display: block !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
        max-width: 100% !important;
        position: relative !important;
        clear: both !important;
    }
    
    .kpg-faq-answer span {
        display: inline !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    .kpg-faq-answer strong,
    .kpg-faq-answer b {
        display: inline !important;
    }
    
    .kpg-faq-answer * {
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .kpg-back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    /* Ensure all images are responsive */
    .kpg-block img {
        max-width: 100%;
        height: auto;
    }
    
    /* Optimize text readability on mobile */
    body {
        font-size: 16px;
        line-height: 1.6;
        -webkit-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }
}

@media (max-width: 576px) {
    .kpg-container {
        padding: 50px 10px 30px;
    }
    
    .kpg-page-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .kpg-introduction-title {
        font-size: 1.6rem;
    }
    
    .kpg-introduction-description {
        font-size: 0.9rem;
    }
    
    .kpg-table-of-contents {
        padding: 15px;
    }
    
    .kpg-advantage-item,
    .kpg-faq-item,
    .kpg-review-item {
        padding: 20px 15px;
    }
    
    .kpg-block {
        padding: 20px 10px;
    }
    
    .kpg-block-title {
        font-size: 1.4rem;
    }
    
    .kpg-faq-question {
        font-size: 0.9rem;
    }
    
    .kpg-faq-item {
        width: 100%;
        max-width: 100%;
    }
    
    .kpg-faq-question-wrapper {
        padding: 12px 10px;
        width: 100%;
        box-sizing: border-box;
    }
    
    .kpg-faq-question {
        font-size: 0.85rem;
        padding-right: 8px;
        flex: 1;
        min-width: 0;
        word-wrap: break-word;
        overflow-wrap: break-word;
        word-break: break-word;
    }
    
    .kpg-faq-answer {
        font-size: 0.85rem;
        padding: 0 !important;
        max-height: 0 !important;
        overflow: hidden !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
        word-break: break-word;
        width: 100%;
        box-sizing: border-box;
        display: block !important;
        position: relative !important;
        clear: both !important;
        line-height: 1.7 !important;
        opacity: 0 !important;
        visibility: hidden !important;
    }
    
    .kpg-faq-item.active .kpg-faq-answer {
        padding: 15px 10px !important;
        max-height: 5000px !important;
        box-sizing: border-box;
        display: block !important;
        overflow: visible !important;
        opacity: 1 !important;
        visibility: visible !important;
    }
    
    .kpg-faq-answer p {
        margin: 0 0 10px 0 !important;
        padding: 0 !important;
        display: block !important;
        line-height: 1.7 !important;
        position: relative !important;
        clear: both !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
        max-width: 100% !important;
    }
    
    .kpg-faq-answer p:last-child {
        margin-bottom: 0 !important;
    }
    
    .kpg-faq-answer div {
        display: block !important;
        margin: 0 !important;
        padding: 0 !important;
        position: relative !important;
        clear: both !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
        max-width: 100% !important;
    }
    
    .kpg-faq-answer span {
        display: inline !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }
    
    .kpg-faq-answer strong,
    .kpg-faq-answer b {
        display: inline !important;
        font-weight: 700 !important;
    }
    
    .kpg-faq-answer * {
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .kpg-introduction-button {
        padding: 12px 24px;
        font-size: 0.95rem;
        width: 100%;
        text-align: center;
    }
    
    /* Touch-friendly buttons */
    button, .button, a.button {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Optimize images for mobile */
    img {
        max-width: 100%;
        height: auto;
    }
    
    /* Prevent horizontal scroll */
    table {
        width: 100%;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* ==========================================================================
   Mobile Performance Optimizations
   ========================================================================== */

/* Reduce animations on mobile for better performance */
@media (max-width: 768px) {
    * {
        animation-duration: 0.01ms !important;
        animation-delay: 0.01ms !important;
        transition-duration: 0.01ms !important;
        transition-delay: 0.01ms !important;
    }
    
    /* Keep essential transitions */
    .kpg-faq-answer {
        transition: max-height 0.3s ease, padding 0.3s ease !important;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    a, button, input, select, textarea {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Remove hover effects on touch devices */
    .kpg-advantage-item:hover,
    .kpg-faq-item:hover,
    .kpg-review-item:hover {
        box-shadow: var(--kpg-shadow-sm);
        transform: none;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .kpg-breadcrumb,
    .kpg-table-of-contents,
    .kpg-block-inquiry,
    .kpg-back-to-top {
        display: none;
    }
    
    .kpg-page-header {
        background: none;
        color: #000000;
        padding: 20px 0;
    }
    
    .kpg-page-title {
        color: #000000;
        text-shadow: none;
    }
    
    .kpg-block {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #cccccc;
        margin-bottom: 20px;
    }
}